Critical hemodynamic therapy oriented resuscitation helping reduce lung water production and improve survival / 中华医学杂志(英文版)

Background:@#Increased extravascular lung water (EVLW) in shock is common in the critically ill patients. This study aimed to explore the effect of cardiac output (CO) on EVLW and its relevant influence on prognosis.@*Methods:@#The hemodynamic data of 428 patients with pulse-indicated continuous CO catheterization from Department of Critical Care Medicine, Peking Union Medical College Hospital were retrospectively collected and analyzed. The patients were assigned to acute respiratory distress syndrome group, cardiogenic shock group, septic shock group, and combined shock (cardiogenic and septic) group according to their symptoms. Information on 28-day mortality and renal function was also collected.@*Results:@#The CO and EVLW index (EVLWI) in the cardiogenic and combined shock groups were lower than those in the other groups (acute respiratory distress syndrome group vs. cardiogenic shock group vs. septic shock group vs. combined shock group: CO, 5.1 [4.0, 6.2] vs. 4.7 [4.0, 5.7] vs. 5.5 [4.3, 6.7] vs. 4.6 [3.5, 5.7] at 0 to 24 h, P=0.009; 4.6 [3.8, 5.6] vs. 4.8 [4.1, 5.7] vs. 5.3 [4.4, 6.5] vs. 4.5 [3.8, 5.3] at 24 to 48 h, P=0.048; 4.5 [4.1, 5.4] vs. 4.8 [3.8, 5.5] vs. 5.3 [4.0, 6.4] vs. 4.0 [3.2, 5.4] at 48 to 72 h, P=0.006; EVLWI, 11.4 [8.7, 19.1] vs. 7.9 [6.6, 10.0] vs. 8.8 [7.4, 11.0] vs. 8.2 [6.7, 11.3] at 0 to 24 h, P < 0.001; 11.8 [7.7, 17.2] vs. 7.8 [6.3, 10.2] vs. 8.7 [6.6, 12.2] vs. 8.0 [6.6, 11.1] at 24 to 48 h, P < 0.001; and 11.3 [7.7, 18.7] vs. 7.5 [6.3, 10.0] vs. 8.8 [6.3, 12.2] vs. 8.4 [6.4, 11.2] at 48 to 72 h, P < 0.001. The trend of the EVLWI in the septic shock group was higher than that in the cardiogenic shock group (P < 0.05). Moreover, there existed some difference in the pulmonary vascular permeability index among the cardiogenic shock group, the septic shock group, and the combined shock group, without statistical significance (P > 0.05). In addition, there was no significant difference in tissue perfusion or renal function among the four groups during the observation period (P > 0.05). However, the cardiogenic shock group had a higher 28-day survival rate than the other three groups [log rank (Mantel-Cox) = 31.169, P < 0.001].@*Conclusion:@#Tissue-aimed lower CO could reduce the EVLWI and achieve a better prognosis.

Resuscitation incoherence and dynamic circulation-perfusion coupling in circulatory shock / 中华医学杂志(英文版)

Objective:@#Poor tissue perfusion/cellular hypoxia may persist despite restoration of the macrocirculation (Macro). This article reviewed the literatures of coherence between hemodynamics and tissue perfusion in circulatory shock.@*Data sources:@#We retrieved information from the PubMed database up to January 2018 using various search terms or/and their combinations, including resuscitation, circulatory shock, septic shock, tissue perfusion, hemodynamic coherence, and microcirculation (Micro).@*Study selection:@#The data from peer-reviewed journals printed in English on the relationships of tissue perfusion, shock, and resuscitation were included.@*Results:@#A binary (coherence/incoherence, coupled/uncoupled, or associated/disassociated) mode is used to describe resuscitation coherence. The phenomenon of resuscitation incoherence (RI) has gained great attention. However, the RI concept requires a more practical, systematic, and comprehensive framework for use in clinical practice. Moreover, we introduce a conceptual framework of RI to evaluate the interrelationship of the Macro, Micro, and cell. The RI is divided into four types (Type 1: Macro-Micro incoherence + impaired cell; Type 2: Macro-Micro incoherence + normal cell; Type 3: Micro-Cell incoherence + normal Micro; and Type 4: both Macro-Micro and Micro-cell incoherence). Furthermore, we propose the concept of dynamic circulation-perfusion coupling to evaluate the relationship of circulation and tissue perfusion during circulatory shock.@*Conclusions:@#The concept of RI and dynamic circulation-perfusion coupling should be considered in the management of circulatory shock. Moreover, these concepts require further studies in clinical practice.

Fluid therapy for acute bowel obstruction: The value and its evaluation / 中国实用外科杂志

Bowel obstruction is one of the common acuteabdominal diseases in surgery. The primary task of itstreatment is to replace the effective circulating blood volumelost caused by loss of digestive juice and increased exudationof inflammation through fluid therapy,and stabilize thehemodynamic state of patients. Therefore,optimizing thetiming,amount and composition of fluid therapy according tothe pathophysiological characteristics of fluid loss in patientswith bowel obstruction,and evaluating the effect of fluidtherapy scientifically and reasonably by the cardiac preload,tissue perfusion and oxygen metabolism are the keys to improve fluid therapy for bowel obstruction.

Evaluación de la perfusión tisular en pacientes con choque séptico normodinámico versus hiperdinámico / Evaluation of tissue perfusion in patients with normodynamic versus hyperdynamic septic shock / Perfusão tecidual em pacientes com choque séptico

Resumen: Introducción: Desde que se documentaron las alteraciones del flujo sanguíneo a nivel microvascular en los pacientes con choque séptico, numerosos estudios a través de los años se han encargado de establecer el impacto pronóstico de dichas alteraciones en este grupo de pacientes. Material y métodos: Se realizó un estudio de cohorte ambispectivo, longitudinal, descriptivo y analítico en pacientes con diagnóstico de choque séptico ingresados a la Unidad de Cuidados Intensivos (UCI) en el periodo comprendido entre el 15 de junio de 2015 y el 30 de julio de 2018. Los pacientes se clasificaron al ingreso en SvcO2 ≥ 80% (choque séptico hiperdinámico) y SvcO2 < 80% (choque séptico normodinámico). Se utilizaron las variables de perfusión tisular lactato, Δp(v-a)CO2, Δp(v-a)CO2 /Δ(a-v)O2 y ERO2. Todos los análisis estadísticos se realizaron con el programa SPSSTM 22.0. Resultados: En el periodo considerado, 82 pacientes cumplieron con los criterios de inclusión; de ellos, 60 (73.1%) se clasificaron como estado de choque normodinámico y 22 (26.9%) como hiperdinámico. El análisis multivariado reportó el ERO2 con OR 20.373 (IC 95%: 2.451-169.320; p = 0.005), el lactato con OR 0.533 (IC 95%: 0.146-1.948; p = 0.341), el Δ(v-a)CO2 con OR 4.848 (IC 95%: 1.201-19.565; p = 0.027) y el Δ(v-a)CO2/Δ(a-v)O2 con OR 0.276 (IC 95%: 0.058-1.309; p = 0.105). Conclusión: Los pacientes con choque séptico presentan alteraciones de la perfusión tisular y la microcirculación; estas alteraciones no dependerán del estado hemodinámico (hiperdinamia o normodinamia) del paciente. Con una gasometría arterial y una gasometría venosa central podemos valorar la perfusión tisular y la microcirculación, midiendo variables como lactato, Δp(v-a)CO2, Δp(v-a)CO2/Δ(a-v)O2 y ERO2 sin necesidad de dispositivos sofisticados.

Abstract: Introduction: Since microvascular blood flow alterations were documented in patients with septic shock, numerous studies over the years have established the prognostic impact of these alterations in this group of patients. Material and methods: A cohort, ambispective, longitudinal, descriptive and analytical study was performed in patients with a diagnosis of septic shock admitted to the Intensive Care Unit (ICU) in the period from June 15, 2015 to July 30, 2018. Patients were classified on admission in those with SvcO2 ≥ 80% (hyperdynamic septic shock) and those with SvcO2 < 80% (normodynamic septic shock). The following tissue perfusion variables were used: lactate, Δp(v-a)CO2, Δp(v-a)CO2/Δ(a-v)O2 and ERO2. All statistical analyzes were done with the SPSSTM 22.0 program. Results: In the period considered, 82 patients met the inclusion criteria, 60 of which (73.1%) were classified as in normodynamic shock status and 22 (26.9%) as hyperdynamic. The multivariate analysis reported the ERO2 with OR 20,373 (95% CI: 2.451-169.320, p = 0.005), the lactate with OR 0.533 (95% CI: 0.146-1.948, p = 0.341), the Δ(va)CO2 with OR 4.848 (95% CI: 1.201-19.565, p = 0.027) and Δ(va)CO2/Δ(av)O2 with OR 0.276 (95% CI: 0.058-1.309, p = 0.105). Conclusion: Patients with septic shock have alterations of tissue perfusion and microcirculation; these alterations will not depend on their hemodynamic state (hyperdynamia or normodynamia). With an arterial blood gas analysis and a central venous blood gas analysis, we can assess tissue perfusion and microcirculation, measuring variables such as lactate, Δp(v-a)CO2, Δp(v-a)CO2/Δ(a-v)O2 and ERO2 without the need for sophisticated devices.

Resumo: Introdução: Desde que foram documentadas as alterações do fluxo sanguíneo microvascular em pacientes com choque séptico, numerosos estudos ao longo dos anos têm sido responsáveis por estabelecer o impacto prognóstico dessas alterações nesse grupo de pacientes. Material e métodos: Realizou-se um estudo de coorte, ambispectivo, longitudinal, descritivo e analítico em pacientes com diagnóstico de choque séptico internados na Unidade de Terapia Intensiva (UTI) no período de 15 de junho de 2015 a 30 de julho de 2018. Os pacientes foram classificados na admissão de acordo com SvcO2 ≥ 80% (choque séptico hiperdinâmico) e SvcO2 < 80% (choque séptico normodinâmico). Foram utilizadas as variáveis de perfusão tecidual: lactato, Δp (v-a) CO2, Δp (v-a) CO2 /Δ (a-v) O2 e ERO2. Todas as análises estatísticas foram realizadas com o programa SPSS 22.0. Resultados: No período considerado, 82 pacientes preencheram os critérios de inclusão, sendo 60 pacientes (73.1%) classificados como estado de choque normodinâmico e 22 pacientes (26.9%) como hiperdinâmicos. A análise multivariada relatou o ERO2 com OR 20.373 (95% IC: 2.451-169.320, p = 0.005), o lactato com OR 0.533 (IC 95%: 0.146-1.948, p = 0.341), o Δ (v-a) CO2 com OR 4.848 (IC 95%: 1.201-19.565, p = 0.027) e Δ (v-a) CO2/Δ (a-v) O2 com OR 0.276 (IC 95%: 0.058-1.309, p = 0.105). Conclusão: Os pacientes com choque séptico apresentam alterações de perfusão tecidual e microcirculação, sendo que estas não dependerão do estado hemodinâmico (hiperdinamia ou normodinamia) do paciente. Com uma gasometria arterial e uma gasometria venosa central, podemos avaliar a perfusão tecidual e microcirculação, medindo variáveis como: lactato, Δp (v-a) CO2, Δp (v-a) CO2 /Δ (a-v) O2 e ERO2 sem a necessidade de dispositivos sofisticados.

Correlation of transcutaneous oxygen pressure and blood lactate in patients with septic shock / 中华内科杂志

To analyze the correlation between transcutaneous oxygen pressure (PtcO2) and blood lactate in patients with septic shock. Fifty-sixpatients with septic shock were prospectively investigated. PtcO2 was monitored continuously for 6 hours, and arterial blood gas was measured at baseline (T0) and 6 hours (T6). Records of PtcO2, were analyzed for the correlation with lactate level and lactate clearance rate. PtcO2 valuesin the high lactate clearance group and the low one were compared.The lowest value of PtcO2 at T6 and duration of PtcO2<40 mmHg (1 mmHg=0.133 kPa) were both correlated with lactate level and lactate clearance rateat T6. The low predictive value of PtcO2 was 29 mmHg of lactate clearance under 20％with a sensitivity 85.2％and a specificity 65.5％. The low predictive value of PtcO2 in high lactate clearance group was significantly higher than that in low lactate clearance group, while the duration of PtcO2<40 mmHg was shorter than the latter. During 6 h continuous monitoring, patients with a significant low PtcO2 or prolonged duration of low PtcO2 have relatively high lactate or low lactate clearance after resuscitation.

Effect of goal-directed fluid therapy on the tissue perfusion of elderly patients undergoing laparoscopic radical cystectomy / 临床麻醉学杂志

Objective To evaluate the effects of goal-directed fluid therapy on the tissue perfusion of elderly patients undergoing Laparoscopic Radical Cystectomy.Methods Thirty patients aged 60-82 years with ASA physical status Ⅰ or Ⅱ who were presenting for elective laparoscopic radical cystectomy were randomly divided into routine fluid replacement group (group C,n=15) and GDFT group (group G,n=15).Patients in group C received routine fluid replacement.Patients in group G were treated under goal-directed fluid infusion strategy with a target of SVV≤13%,CI≥2.5 L·min-1·m-2 and ScvO2≥73% under the monitoring of PiCCO.The indexes of hemodynamics and tissue perfusion were collected and recorded at 7 time points: before induction of anesthesia (T1),5 minutes after intubation (T2),5 minutes after pneumoperitoneum and change positions (T3),1 hour after pneumoperitoneum (T4),5 minutes after the abdomen was opened (T5),1 hour after the abdomen was opened (T6) and the end of surgery (T7).Results Compared with group C,group G received less fluid.MAP and SVV between two groups were no statistical significance.The CI in group G in time point T4,T6 and T7 was significantly higher than that in group C (P<0.05).The HR in group G in time point T5 and T6 was significantly higher than that in group C (P<0.05).The aLac in group G in time point T4 and T5 was significantly lower than that in group C (P<0.05).Pcv-aCO2,DO2I and O2ERe between the two groups were not statistically different.Postoperative rehabilitation indexes between the two groups were not statistically significant.Conclusion The GDFT guided under SVV,CI and ScvO2 can keep the effective circulatory volume and pressure to ensure the whole body perfusion,reduce aLac and improve microcirculation without affecting the balance of oxygen supply and demand and the postoperative complication.

The effects of continuous glucose monitoring used in septic shock patients with different tissue perfusion / 中国中西医结合急救杂志

Objective To compare the consistency between interstitial fluid glucose and arterial blood glucose in septic shock patients with different tissue perfusion levels.Methods A prospective investigative study was conducted. Sixty-one septic shock patients with ages above 18 years old admitted to the Department of Critical Care Medicine of Peking Union Medical College Hospital, Chinese Academy of Medical Sciences from April 2013 to December 2013 were enrolled. The real-time continuous glucose monitoring system (RTCGMS) and arterial blood gas analyzer were used to measure the patients' interstitial fluid glucose and arterial blood glucose, and according to the criteria of International Organization for Standardization (ISO) and the median of relative absolute difference (Median RAD), the consistency between interstitial fluid glucose and arterial blood glucose was calculated. Based on the lactate (Lac) level and pulse oxygen perfusion index (PI), the septic shock patients were divided into groups with different degrees of tissue perfusion, the consistency between the interstitial fluid glucose and arterial blood glucose among septic shock patients with different degrees of tissue perfusion was compared by using Bootstrap re-sampling technique.Results Negative correlation existed between PI and Lac (r= -0.272,P 8 mmol/L, their consistency between interstitial fluid glucose and arterial blood glucose was better than that in those with Lac > 2-4 mmol/L, and the 95% credibility intervals (CI) of ISO standardized deviation value was 0.026-38.710 (P 0.7%-1.4%, the 95%CI of median RAD difference value was 0.002-0.076, and the 95%CI of ISO standardized deviation value was -27.000 to -0.583 (allP 3.0%, their consistency between interstitial fluid glucose and arterial glucose was better than that in those with PI ≤ 0.7%, PI > 0.7%-1.4% and PI > 1.4%-3.0%, and the 95%CI of ISO standardized deviation values were 3.322-28.302, 11.988-40.265 and 5.170-33.333 respectively (allP 8 mmol/L or PI ≤ 0.7%), the worse the tissue perfusion, the better the consistency between interstitial fluid glucose and arterial blood glucose; when septic shock patients were under normal local tissue perfusion (PI > 3.0%), the better the local tissue perfusion, the better the consistency between interstitial fluid glucose and arterial blood glucose.

The clinical evaluation of ulinastatin on improvement of renal syndrome hemorrhagic fever with small vas-cular injury / 实用医学杂志

Objective To explore the clinical effect of ulinastatin on capillary injury improvement of renal syndrome hemorrhagic fever and renal leakage. Methods Patients were divided into 2 groups according to the random number table. The experimental group(25 cases)was given with ulinastatin and the control group(25 cases) was given 5% sugar solution as a blank control. All patients were treated with nutritional support ,rehydration , prevention of bleeding and other symptoms. In addition,according to the number of days of fever in the experimental group,the patients were divided into two groups. The experimental group A(9 cases)had fever 1 ~ 4 days;the experimental group B(16 cases)had fever 5 ~ 7 days. All patients were measured in microalbuminuria ,serum creatinine,plasma albumin and other clinical indicators after 7 day treatment. Results Compared with the control group,microalbuminuria of the experimental group was significantly decreased;Creatinine recovery rate was faster than that in the control group;Plasma albumin had significantly increased;The number of symptomatic days of concurrent perfusion of other tissues had also significantly reduced. Compared with the experimental group B , microalbuminuria of the experimental group A was significantly decreased;Creatinine recovery rate was faster than that in the experimental group B;Plasma albumin had significantly increased;The number of symptomatic days of concurrent perfusion of other tissues was also significantly reduced. Conclusion Ulinastatin could effectively treat vascular injury and syndrome due to capillary leakage caused by epidemic hemorrhagic fever virus ,and the best effect occurs in early application in the fever.

Effects of Dobutamine on Related Indexes of Patients with ARDS Caused by Septic Shock / 中国药房

OBJECTIVE:To explore the effects of dobutamine on hemodynamics,tissue perfusion and respiratory function in patients with ARDS caused by septic shock. METHODS:Totally 26 patients with ARDS caused by septic shock were given Dobu-tamine hydrochloride injection 5 μg/(kg·min) by continuous pump for 20 min ,increasing by 5 μg/(kg·min) every 20 min to 15μg/(kg·min)for 6 h. Mean artery pressure(MAP)maintained at about 65 mmHg during continuous pump. Hemodynamic index-es [HR,MAP,cardiac output(CO),stroke volume(SV),total end diastolic volume(GEDV),intrathoracic blood volume index (ITBI),extravascular lung water index (ELWI),systemic vascular resistance index (SVRI)],tissue perfusion indexes (norepi-nephrine,urine volume,blood oxygen saturation,blood lactate)and ventilator parameter indexes(positive breathing pressure,min-ute ventilation volume,respiratory rate,peak inspiratory pressure and plateau pressure)of all patients were recorded before medica-tion,6,24,48 h after medication. RESULTS:There were no statistical significances in HR,MAP,GEDV,ITBI,blood oxygen saturation,blood lactate and respiratory rate before and after treatment (P>0.05). CO,SV,urine volume and minute ventilation volume of all patients 6,24,48 h after medication were significantly higher than before medication,and those indexes increased gradually as medication time. ELWI,SVRI,positive breathing pressure,peak inspiratory pressure and plateau pressure of all pa-tients after medication were significantly lower than before medication,and those indexes decreased gradually as medication time, with statistical significance(P0.05). CONCLUSIONS:The early application of dobutamine ELWI,tis-sue perfusion and respiratory function in patients with ARDS caused by septic shock,and can keep hemodynamics stable.

The influence of left ventricular-arterial coupling on the prognosis of elderly patients with septic shock / 中华内科杂志

Objective To investigate the influence of left ventricular-arterial coupling(VAC) on clinical prognosis of elderly patients with septic shock.Methods A total of 56 elderly septic shoek patients were enrolled in this study,all of whom were admitted to Department of Intensive Care Unit in Zhejiang Hospital from August 2014 to October 2015.The patients were divided into two groups according to the status of left ventricular-arterial coupling when septic shock was diagnosed,which were left ventricular-arterial uncoupling group(UC group) and left ventricular-arterial coupling group(C group).Various parameters were recorded,including blood lactate level,central venous oxygen saturation(ScvO2),serum level of N-terminal pro-brain natriuretic peptide(NT-proBNP) and cardiac troponin Ⅰ (cTN Ⅰ),dose of vasoactive drugs,the total fluid volume and urine volume per hour within 24 hours.The 28-day survival rate was a key index of prognosis.Multivariate logistic regression was taken to analyze risk factors related to death within 28 day.Results Compared with C group,UC group had lower values of left ventricular ejection fraction[(42.43 ±4.76)％ vs (53.17±3.01)％;P＜0.01] and cardiac index[(2.36±0.68) L· min-1 · m 2vs (2.93±0.45)L · min-1 · m-2;P ＜0.01].Yet serum levels of NT-proBNP[lg NT-proBNP 3.93 ±0.53 vs 3.40 ±0.63;P =0.004] and cTN Ⅰ [lg cTN Ⅰ-0.16 ± 0.68 vs-1.03 ± 0.69;P ＜ 0.001] in UC group were higher than those in C group.Moreover,the total fluid volume within 24 hours [(3 806.3 ± 831.4) ml vs (3 142.0±770.0) ml;P =0.016],blood lactate level[(5.61 ±2.68) mmol/L vs (3.93 ± 1.59)mmol/L;P =0.043] and dose of norepinephrine[(0.630 ±0.300) μg · kg-1 · min-1 vs (0.292 ±0.234)μg · kg-1 · min-1;P =0.001] in UC group were greater than those in C group,while ScvO2 [(60.75 ±2.91)％ vs (64.42 ±2.19)％;P＜0.001] and urine volume per hour[(0.518 ±0.358) ml vs (0.926 ±0.678) ml;P =0.007] were less than those in C group.Compared with C group,UC group had a lower 28-day survival rate [43.2％ (19/44) vs 9/12;P =0.049].Ea/Ees ratio was negatively correlated with LVEF,ScvO2 (r =-0.686,P ＜ 0.001;r =-0.411,P =0.002),positively correlated with NT-proBNP,cTN Ⅰ (r =0.294,P =0.028;r =0.363,P =0.006),yet no obvious correlation was noticed with blood lactate level (r =0.170,P =0.21).Multiple logistic regression analysis showed that VAC(OR =11.187,95％ CI 2.489-50.285;P =0.002),lactate level (OR =1.727,95 ％ CI 1.164-2.563;P =0.007) and lg cTN Ⅰ (OR =0.247,95 ％ CI 0.079-0.779;P =0.017) were independent risk factors affecting 28-day mortality.Conclutions In elderly patients with septic shock,left ventricular-arterial uncoupling indicates a lower 28-day survival rate,worse cardiac function and tissue perfusion.Ea/Ees ratio might sever as a predictive indicator of 28-day mortality.

Effect of goal-directed fluid therapy on the oxygen delivery and consumption and tissue perfusion in pa-tients with continuous hyperthermic peritoneal perfusion / 临床麻醉学杂志

Objective To discuss the effects of the goal-directed fluid therapy on the haemody-namics,oxygen delivery and consumption and tissue perfusion in patients with continuous hyperther-mic peritoneal perfusion.Methods Eighty patients (61 males,19 females,aging from 30 to 60years old,ASA grade Ⅰ-Ⅲ)undergoing continuous hyperthermic peritoneal perfusion were selected and di-vided into 2 groups (n=40).Conventional liquid treatment group(group C)and Stroke Volume Vari-ation-directed liquid treatment group(group S).All patients were received general anesthesia and mo-nitored with FloTrac/Vigile systerm.MAP,HR,CVP,CI,PaO2 ,SaO2 ,PvO2 ,ScvO2 and Lac were all recorded in the time before anesthesia(T0 ),5 min after endotracheal intubation (T1 ),before CHPP (T2 ),CHPP for 30 min (T3 ),CHPP for 60 min (on the end,T4 ),30 min after CHPP (T5 ), and at the end of surgery (T6 ).According to the formula to calculate oxygen transport (DO2 I)and oxygen consumption index (VO2 I).Results Compared with group C,the amount of fluid, crystalloid solution,and urine volume were all much lower and colloidal solution was much higher in group S (P <0.05).Compared with T1 ,MAP decreased in the two groups at T3 and T4 ,yet HR in-creased and CVP decreased in group C at T4 (P <0.05).CVP increased in group C at T6 and in group S at T3-T5 .At the time points of T3 to T6 ,MAP and CI in group S were significantly higher than those in group C,while CVP and HR were much lower in group S (P <0.05).Compared with T1 , the DO2 I in group C were lower at T4 ,T5 (P <0.05),while VO2 I,O2 ER and Lac in group C in-creased at T3-T6 (P <0.05),also ScvO2 decreased at the same time (P <0.05).Compared with T1 , the VO2 I increased at T4-T6 ,but ScvO2 decreased at T3 ,T4 in group S (P <0.05).DO2 I in group S were higher than those in group C at T4 and T5 ,whereas,VO2 I,O2 ER and Lac level in group S were much lower than those in group C,and ScvO2 were significantly higher than those at T3-T6 in group C (P <0.05).Conclusion Stroke variation degree-oriented liquid treatment could effectively maintain hemodynamic stability,increase the body's oxygen supply,reduce oxygen consumption and improve tissue perfusion.

Vacuum therapy in penile rehabilitation after radical prostatectomy: Review of hemodynamic and antihypoxic evidence / 亚洲男科学杂志(英文版)

Generally, hypoxia is a normal physiological condition in the flaccid penis, which is interrupted by regular nocturnal erections in men with normal erectile function. [1] Lack of spontaneous and nocturnal erections after radical prostatectomy due to neuropraxia results in persistent hypoxia of cavernosal tissue, which leads to apoptosis and degeneration of cavernosal smooth muscle fibers. Therefore, overcoming hypoxia is believed to play a crucial role during neuropraxia. The use of a vacuum erectile device (VED) in penile rehabilitation is reportedly effective and may prevent loss of penile length. The corporal blood after VED use is increased and consists of both arterial and venous blood, as revealed by color Doppler sonography and blood gas analysis. A similar phenomenon was observed in negative pressure wound therapy (NPWT). However, NPWT employs a lower negative pressure than VED, and a hypoperfused zone, which increases in response to negative pressure adjacent to the wound edge, was observed. Nonetheless, questions regarding ideal subatmospheric pressure levels, modes of action, and therapeutic duration of VED remain unanswered. Moreover, it remains unclear whether a hypoperfused zone or PO 2 gradient appears in the penis during VED therapy. To optimize a clinical VED protocol in penile rehabilitation, further research on the mechanism of VED, especially real-time PO 2 measurements in different parts of the penis, should be performed.

Monitorización de la perfusión tisular en el paciente críticamente enfermo / Monitoring tissue perfusion in critically ill patients

La hipoperfusión tisular contribuye a la disfunción orgánica múltiple, por lo que deberá de ser monitoreada en los pacientes críticamente enfermos; El choque de cualquier etiología, se caracteriza por la inadecuada perfusión de los tejidos del organismo, produciendo una situación de desequilibrio entre el aporte y la demanda de oxígeno. Sin embargo, la evaluación hemodinámica temprana que se lleva a cabo mediante hallazgos físicos, entre ellos signos vitales, presión venosa central y volumen urinario no detectan la hipoxia tisular global persistente. La monitorización actual para la valoración de la oxigenación tisular durante la reanimación del paciente crítico está basada principalmente en los parámetros de transporte y consumo de oxígeno derivados de la hemodinámica global.

Tissue hypoperfusion contributes to multiple organ dysfunction, so it should be monitored in critically ill patients; The shock of any etiology, is characterized by the inadequate tissue perfusion, producing a situation of imbalance between the contribution and the oxygen demand. However, early hemodynamic evaluation using physical findings, including vital signs, central venous pressure and urinary volume, does not detect persistent global tissue hypoxia. The current monitoring for evaluation of tissue oxygenation during critical patient resuscitation is based mainly on oxygen transport and oxygen consumption parameters derived from global hemodynamics.

Effect of esmolol on fluid responsiveness and hemodynamic parameters in patients with septic shock / 中华危重病急救医学

Objective To study the effects of esmolol on fluid responsiveness and hemodynamic parameters in patients with septic shock.Methods A prospective self-control study was conducted.Fifteen septic shock patients undergoing mechanical ventilation admitted to Department of Critical Care Medicine of Yijishan Hospital from January 2015 to August 2015 were enrolled.All patients enrolled in this study were given the treatment based on American College of Chest Physicians/Society of Critical Care Medicine (ACCP/SCCM) Consensus 2012.Esmolol was intravenously injected at a beginning rate of 6 mg·kg-1·h-1, and then the dose was adjusted to reduce heart rate by 10％ from baseline.The changes in hemodynamic and systemic oxygen metabolism indexes were monitored by pulse indicator continuous cardiac output (PiCCO) before and 2 hours after the esmolol administration, and the fluid responsiveness was evaluated by stroke volume variation (SVV).SVV ≥ 10％ was considered to be a positive fluid responsiveness.Results In 15 patients, 9 were male and 6 female, with an age of 65 ± 16.Among them 10 patients suffered from pulmonary infection, and 5 patients with abdominal infection.Acute physiology and chronic health evaluation Ⅱ (APACHE Ⅱ) score was 21 ±9;sequential organ failure score (SOFA) was 8 ±4.28-day mortality was 40.0％.SVV was significantly decreased after esmolol infusion as compared with baseline [(14 ± 5)％ vs.(17 ±7)％, t =2.400, P =0.031].Heart rate [HR (bpm): 100±4 vs.112±8, t =8.161, P =0.000], cardiac output [CO (L/min):6.13 ± 1.45 vs.7.88 ± 1.82, t =4.046, P =0.001], cardiac index [CI (mL·s-1·m-2): 51.51 ± 11.00 vs.66.18 ± 11.48, t =4.131, P =0.001], stroke volume index [SVI (mL/m2): 31.0 ± 6.4 vs.35.4 ± 6.5, t =2.577, P =0.020], the maximum rate of left ventricular pressure rise [dp/dt max (mmHg/s): 927±231 vs.1 194±294, t =3.775, P =0.002], global ejection fraction (GEF: 0.21 ±0.05 vs.0.24±0.06, t =3.091, P =0.008), cardiac function index (CFI: 5.03 ± 1.37 vs.6.59 ± 1.92, t =4.769, P =0.000) showed significant decrease during esmolol infusion.On the other hand, central venous pressure [CVP (mmHg, 1 mmHg =0.133 kPa): 9±3 vs.8±3, t =-3.617, P =0.003], diastolic blood pressure (DBP, mmHg: 69± 15 vs.66± 13, t =-2.656, P =0.019), systemic vascular resistance index (SVRI, kPa·s·L-1·m-2:206.8±69.8 vs.206.8±69.8, t =-3.255, P =0.006) were significantly increased during esmolol infusion.No significant difference was found in systolic blood pressure [SBP (mmHg): 120 ± 25 vs.123 ± 18, t =0.678, P =0.509],mean arterial pressure [MAP (mmHg): 86 ± 18 vs.85 ± 14, t =-0.693, P =0.500], global end diastolic volume index [GEDVI (mL/m2): 614 ± 84 vs.618 ± 64, t =0.218, P =0.830], extravascular lung water index [EVLWI (mL/kg):5.99±1.50 vs.5.73±1.14, t =-1.329, P =0.205], central venous oxygen saturation (ScvO2: 0.711±0.035 vs.0.704 ± 0.048, t =-0.298, P =0.773), arterial blood lactate [Lac (mmol/L): 3.1± 0.3 vs.3.0 ± 0.4, t =-0.997, P =0.345],and difference of central venous-arterial carbon dioxide partial pressure [Pcv-aCO2 (mmHg): 4.1 ± 0.9 vs.4.7 ± 0.5,t =1.445, P =0.182] as compared with those before esmolol treatment.Conclusion Heart rate control with esmolol infusion may reduce fluid responsiveness, cardiac function, heart rate and cardiac output without adverse effect on systemic perfusion in septic shock patients.

Effect of early goal directed therapy on tissue perfusion and oxygen metabolism in patients with septic shock / 中国医师进修杂志

Objective To observe the effect of early goal directed therapy (EGDT) on tissue perfusion,microcirculation and oxygen metabolism in patients with septic shock.Methods A prospective observational study was carried out in 69 patients with early septic shock within 24 hours.The eligible patients were treated with the standard procedure of EGDT.The partial pressure of transcutaneous oxygen (PtcO2) and transcutaneous carbon dioxide (PtcCO2) was monitored and the changes of hemodynamic data,tissue oxygen,microcirculation before and after reaching the criteria of EGDT were recorded.Results Compared with that before treatment,PtcO2,tissue oxygenation index (PtcO2/FiO2) after EGDT was increased [(78.1 ± 30.8) mmHg (1 mmHg =0.133 kPa) vs.(62.8 ± 24.1) mmHg and (141.7 ± 78.3) mmHg vs.(110.8 ± 60.5) mmHg],PtcCO2 and percutaneous arterial carbon dioxide partial pressure difference was decreased[(29.0 ±4.1) mmHg vs.(39.1 ±6.4) mmHg and (1.4 ±0.5) mmHg vs.(1.7 ±0.8) mmHg],there was significant difference(P＜ 0.05).There was no significant difference in PtcO2,PtcO2/FiO2,PtcCO2,central venous blood oxygen saturation,lactic acid,oxygen and oxygen consumption (P ＞ 0.05).Conclusion EGDT can improve local tissue perfusion and microcirculation in patients with septic shock,body tissue perfusion index before and after EGDT may not be able to reflect the local tissue perfusion.

A correlation of pulse pressure and prognosis of refractory septic shock patients / 中华内科杂志

Objective To explore the correlation of pulse pressure(PP) and outcome in refractory septic shock patients.Methods A total of 68 patients with refractory septic shock consecutively admitted in our ICU from January 2012 to December 2012 were retrospectively studied.Hemodynamic data and arterial lactate concentration were collected at the time of admission and 24 hours after admission.The outcome of Day 28 post-diagnosis was also recorded.Results (1) Compared with the survivors,heart rate(HR) at 24hours after admission was higher in non-survivors,while 24 h lactate clearance rate (rLac) was lower in them (P ＜ 0.05).Other hemodynamic parameters showed no difference between the non-survivors and the survivors at 24 hours after admission,including central venous pressure (CVP),mean arterial pressure (MAP),systolic blood pressure(SBP),diastolic blood pressure(DBP),PP,pulse pressure/heart rate (PP/HR),pulse pressure/mean arterial pressure(PP/MAP),pulse pressure/systolic pressure(PP/SBP),pulse pressure/diastolic pressure (PP/DBP),the value of SBP above MAP (SMP) and the value of DBP below MAP(MDP).(2)The mortality rate was higher in the patients with HR≥100 b/min than those with HR ＜ 100 b/min,but without statistical significance (56.25％ vs 36.11％,P =0.096).Compared with the survivors,no matter with HR≥100 b/min or HR ＜ 100 b/min,lactate(Lac) at the 24 hours after admission was higher in all the non-survivors (P ＜ 0.05),while with lower rLac (P ＜ 0.05).In those with HR ≥100 b/min,the following hemodynamic parameters were higher in the non-survivors than in the survivors,including PP,PP/HR,PP/MAP,PP/SBP,PP/DBP,SMP and MDP (all P values ＜ 0.05),while no statistical difference was observed in those with HR ＜ 100 b/min.(3)The mortality rate showed no statistical difference in those with MAP≥85 mmHg(1 mmHg =0.133 kPa) and with MAP ＜ 85 mmHg(42.42％ vs 48.57％,P =0.611).No matter MAP≥85 mmHg or MAP ＜ 85 mmHg,compared with the survivors,all the non-survivors had higher Lac at the 24 hours after admission (P ＜ 0.05),while with lower rLac (P ＜ 0.05).In those with MAP≥85 mmHg,HR was higher in the non-survivors than the survivors (P ＜ 0.05).In those with MAP ＜ 85 mmHg,compared with the survivors,the non-survivors had higher PP,PP/MAP,PP/SBP,PP/DBP,SMP and MDP (P ＜0.05),while with lower DBP (P ＜0.05).Conclusion PP is correlated with the outcome in refractory septic shock patients.When the HR and MAP differ,PP has different effect on the outcome and contributes more to the tissue perfusion and outcome in those with higher HR and lower MAP.

Effect of EGDT on tissue perfusion in patients with septic shock / 中华急诊医学杂志

Objective To observe the effect of early goal directed therapy (EGDT) on tissue perfusion,microcirculation and tissue oxygenation in patients with septic shock.Methods A prospective observational study was carried out in 20 patients with early septic shock admitted to ICU within 24 hours after onset.Patients with one of following conditions,including stroke,brain injury,other types of shock,severe heart failure,acute myocardium infarction,ages below 18,pregnancy,terminal stage of disease,cardiac arrest,extensive bums,mouth bleeding,oromandiblular dyetonia (difficult to open the mouth),and the time elapsed over 24 hours after onset of septic shock,were excluded.The eligible patients were treated with the standard procedure of EGDT.The partial pressure of transcutaneous oxygen and carbon dioxide (PtcO2,PtcCO2) was monitored and hemodynamic data were recorded.Sidestream dark field imaging device was applied to detect the sublingual microcirculation.Hemodynamics,tissue oxygen,and sublingual microcirculation were compared before treatment and after EGDT.When the variables met the normal distribution,t test was applied.Otherwise,Wilcoxon test was used.Correlation between variables was analyzed with Pearson Correlation Analysis.Results Of 20 patients,19 met all 4 elements in criteria of EGDT after treatment and were eligible for study.PtcO2 and PtcCO2 were monitored in 19 patients.Sublingual microcirculation was obtained in four of them.(1) After the criteria of EGDT were entirely met,PtcO2 increased from (62.7 ± 24.0) mm Hg to (78.0 ± 30.9) mm Hg (P ＜ 0.05) ; tissue oxygenation index (PtcO2/FiO2) was (110.7 ± 60.4) mm Hg before treatment and (141.6 ± 78.2) mm Hg after EGDT (P ＜ 0.05).PtcCO2 and PaCO2 gap (difference between PtcCO2 and PaCO2) decreased significantly after EGDT (P ＜ 0.05).(2) Both proportion of small vessels with perfusion (PVP) and microcirculatory flow index of small vessels (MFI) showed a trend of increase after EGDT,but there were no significant differences between pre-and post-EGDT (P was 0.051 and 0.074 respectively).(3) PtcO2,PtcO2/FiO2,and PtcCO2 were not linearly related to central venous saturation,lactate,oxygen delivery,and oxygen consumption (All P ＞ 0.05).Conclusions Peripheral perfusion improved after EGDT in patients with septic shock but those hemodynamic variables might not exactly reflect the authenticity of global perfusion.

Effect of early goal directed therapy on tissue perfusion in patients with septic shock / 世界急诊医学杂志（英文）

@#BACKGROUND: This study aimed to observe the effect of early goal directed therapy (EGDT) on tissue perfusion, microcirculation and tissue oxygenation in patients with septic shock. METHODS: Patients with early septic shock (<24 hours) who had been admitted to the ICU of Zhongda Hospital Affiliated to Southeast University from September 2009 through May 2011 were enrolled (research time: 12 months), and they didn't meet the criteria of EGDT. Patients who had one of the following were excluded: stroke, brain injury, other types of shock, severe heart failure, acute myocardial infarction, age below 18 years, pregnancy, end-stage disease, cardiac arrest, extensive burns, oral bleeding, difficulty in opening the mouth, and the onset of septic shock beyond 24 hours. Patients treated with the standard protocol of EGDT were included. Transcutaneous pressure of oxygen and carbon dioxide (PtcO2, PtcCO2) were monitored and hemodynamic measurements were obtained. Side-stream dark field (SDF) imaging device was applied to obtain sublingual microcirculation. Hemodynamics, tissue oxygen, and sublingual microcirculation were compared before and after EGDT. If the variable meets the normal distribution, Student's t test was applied. Otherwise, Wilcoxon's rank-sum test was used. Correlation between variables was analyzed with Pearson's product-moment correlation coefficient method. RESULTS: Twenty patients were involved, but one patient wasn't analyzed because he didn't meet the EGDT criteria. PtcO2 and PtcCO2 were monitored in 19 patients, of whom sublingual microcirculation was obtained. After EGDT, PtcO2 increased from 62.7±24.0 mmHg to 78.0±30.9 mmHg (P<0.05) and tissue oxygenation index (PtcO2/FiO2) was 110.7±60.4 mmHg before EGDT and 141.6±78.2 mmHg after EGDT (P<0.05). The difference between PtcCO2 and PCO2 decreased significantly after EGDT (P<0.05). The density of perfused small vessels (PPV) and microcirculatory flow index of small vessels (MFI) tended to increase, but there were no significant differences between them (P>0.05). PtcO2, PtcO2/FiO2, and PtcCO2 were not linearly related to central venous saturation, lactate, oxygen delivery, and oxygen consumption (P>0.05). CONCLUSION: Peripheral perfusion was improved after EGDT in patients with septic shock, and it was not exactly reflected by the index of systemic perfusion.

Clinical application of thrombus aspiration catheters during percutaneous coronary intervention and coronary angiography in patients with acute myocardial infarction / 中国综合临床

Objective To observe the safety and efficiency of DIVER thrombus aspiration catheter application during percutaneous coronary intervention(PCI) in patients with acute myocardial infarction(AMI)and to evaluate its impacts on the myocardial reperfusion,cardiac function and in-stent restenosis after 9months.Methods A total of 86 cases of ST-segment elevation patients of AMI treated with PCI and confirmed complete occlusion lesion by angiography from November 2008 to December 2010 were randomly divided into two groups:aspiration group(n =43)with DIVER thrombus aspiration cathetcrs were used,and non-aspiration group (n =43).ST-segment recovery within two hours,TIMI grade,the in-hospital adverse major cardiac events,the levels of Pro-BNP,coronary function determined by ultrasound heartbeat graph and the results of coronary angiography after PCI for 9 months were compared between two groups.Results There was significant difference on ST-segment recovery within two hours between these two groups[95.35％(41/43)vs 79.02％(34/43),x2 =11.862,P =0.0006].The incidence of TIMI 3 grade flow was significantly higher,the incidence of TIMI 2(slow flow)and TIMI 0-1(no-reflow)grade flow were much lower in aspiration group than those in non-aspiration group immediately after PCI[TIMI 3:93.02％(40/43) vs 81.40％(35/43),x2 =6.06,P =0.0335 ; TIMI 2:6.98％(3/43) vs 13.95 ％(6/43),x2 =3.12,P =0.0495 ; TIMI 0-1:0 vs 6.98 ％(3/43),x2 =5.29,P =0.0352].There was no difference on LVEF[(0.420±0.054) ％ vs(0.408±0.052)％,t =1.0496,P =0.766and LVEDD(56.5±4.5)mm vs(57.6±4.4)mm,t =1.0419,P =0.7832]between these two groups one day after PCL LVEF was significandy higher in aspiration group than that in non-aspiration group one and nine months after PCI[(0.452±0.050) ％ vs(0.432±0.049) ％,t =3.3957,P =0.0482 ;(0.469±0.053) ％ vs (0.413±0.052)％,t =4.9457,P =0.0336].LVEDD was significantly smaller in aspiration group than that in non-aspiration group one and nine months after PCI[(49.6±5.1) mm vs(53.4±4.6) mm,t =3.4548,P =0.0473 ;(46.5±4.4) mm vs(50.2±4.8) mm,t =3.7260,P =0.0421].There were no cardiovascular events (angina,myocardial infarction,heart failure,cardiac death)in both groups during 9 months follow-up.The coronary angiography results showed that the occurrence rate of in-stent restenosis in aspiration group was significantly lower than that in non-aspiration group(2.33％ vs 6.98％,x2 =4.4351,P =0.0463).Conclusion The application of DIVER thrombus aspiration catheters during PCI in all patients with AMI was safe and effective,it can improve the myocardial tissue perfusion and the post-operative cardiac function and can lower the occurrence rate of in-stent restenosis.

Typical and atypical enteropathogenic Escherichia coli bacterial translocation associated with tissue hypoperfusion in rats

Although enteropathogenic Escherichia coli (EPEC) are well-recognized diarrheal agents, their ability to translocate and cause extraintestinal alterations is not known. We investigated whether a typical EPEC (tEPEC) and an atypical EPEC (aEPEC) strain translocate and cause microcirculation injury under conditions of intestinal bacterial overgrowth. Bacterial translocation (BT) was induced in female Wistar-EPM rats (200-250 g) by oroduodenal catheterization and inoculation of 10 mL 10(10) colony forming unit (CFU)/mL, with the bacteria being confined between the duodenum and ileum with ligatures. After 2 h, mesenteric lymph nodes (MLN), liver and spleen were cultured for translocated bacteria and BT-related microcirculation changes were monitored in mesenteric and abdominal organs by intravital microscopy and laser Doppler flow, respectively. tEPEC (N = 11) and aEPEC (N = 11) were recovered from MLN (100 percent), spleen (36.4 and 45.5 percent), and liver (45.5 and 72.7 percent) of the animals, respectively. Recovery of the positive control E. coli R-6 (N = 6) was 100 percent for all compartments. Bacteria were not recovered from extraintestinal sites of controls inoculated with non-pathogenic E. coli strains HB101 (N = 6) and HS (N = 10), or saline. Mesenteric microcirculation injuries were detected with both EPEC strains, but only aEPEC was similar to E. coli R-6 with regard to systemic tissue hypoperfusion. In conclusion, overgrowth of certain aEPEC strains may lead to BT and impairment of the microcirculation in systemic organs.