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1.
Biotechnol Genet Eng Rev ; : 1-11, 2023 Apr 17.
Artigo em Inglês | MEDLINE | ID: mdl-37066803

RESUMO

This randomized controlled study aimed to prospectively evaluate the application effects of other venous access in patients undergoing cardiopulmonary resuscitation. A total of 212 patients who underwent respiratory and cardiac arrest were randomly divided into peripheral intravenous (IV) access group (IV group, n = 69), femoral vein catheterization group (FVC group, n = 72), and internal jugular vein catheterization group (IJVC group, n = 71). The puncture time, first administration time, pressure interruption time caused by the establishment of fluid pathway, endotracheal intubation time, complications, ROSC time, and ETCO2 were recorded. The time of establishing venous access was: IVIJVC>IV, P = 0.04). There was no significant difference in EtCO2 between the FVC, IV group, and IJVC group (PVC>IJVC>IV, P = 0.17). Due to catheterization, the time of suspending chest compression in the FVC group was significantly lower than in the IJVC group (5s vs. 12s). The time of establishing an artificial airway in the IV (38s) and FVC (35s) group were significantly longer than that in IJVC (52s) group. Central venous catheterization is more effective than peripheral venous catheterization in cardiopulmonary resuscitation. Moreover, femoral vein access was more effective than internal jugular vein access.

2.
Clin Case Rep ; 11(3): e7005, 2023 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-36911633

RESUMO

We report a case of life-threatening airway obstruction due to retropharyngeal-cervicomediastinal hematomas following transjugular intrahepatic portosystemic shunt or acute variceal bleeding in cirrhosis. Even though this is a rare complication, clinicians should maintain a high index of suspicion and evaluate and treat it promptly to prevent a fatal outcome.

3.
Am J Physiol Heart Circ Physiol ; 323(4): H763-H773, 2022 10 01.
Artigo em Inglês | MEDLINE | ID: mdl-36018757

RESUMO

Cardiac arrhythmias are associated with cardiovascular morbidity and mortality. Cardiac electrophysiology studies (EPS) use intracardiac catheter recording and stimulation for profound evaluation of the heart's electrical properties. The main clinical application is investigation and treatment of rhythm disorders. These techniques have been translated to the murine setting to open opportunities for detailed evaluation of the impact of different characteristics (including genetics) and interventions on cardiac electrophysiology and -pathology. Currently, a detailed description of the technique of murine transjugular EPS (which is the standard route of catheter introduction) is lacking. This article provides detailed information on EPS in mice via the transjugular route. This includes catheter placement, stimulation protocols, intracardiac tracing interpretation, artifact reduction, and surface ECG recording. In addition, reference values as obtained in C57BL/6N mice are presented for common electrophysiological parameters. This detailed methodological description aims to increase accessibility and standardization of EPS in mice. Ultimately, also human research and patient care may benefit from translation of the knowledge obtained in preclinical models using this technique.NEW & NOTEWORTHY Electrophysiology studies (EPS) allow in-depth evaluation of cardiac electrophysiology and -pathology. These techniques have been adapted to the murine setting for (translational) studies, mainly focusing on arrhythmogenesis. Despite the frequent application of EPS via the transjugular route, a thorough description of the technique is currently lacking. This article aims to function as a comprehensive guide, also elaborating (for the first time) on nonsurgical aspects such as catheter positioning, tracing artifacts, stimulation protocols, and reference values.


Assuntos
Arritmias Cardíacas , Técnicas Eletrofisiológicas Cardíacas , Animais , Eletrocardiografia , Técnicas Eletrofisiológicas Cardíacas/métodos , Coração , Humanos , Camundongos , Camundongos Endogâmicos C57BL
4.
BMC Med Educ ; 22(1): 420, 2022 Jun 02.
Artigo em Inglês | MEDLINE | ID: mdl-35655205

RESUMO

BACKGROUND: In the intensive care unit (ICU), internal jugular vein puncture and catheterization are basic rescue operations that physicians need to complete quickly and independently. It is necessary to improve the first-attempt success rate of internal jugular vein catheterization, shorten the catheterization duration and reduce the incidence of complications for standardized training residents (STRs). OBJECTIVE: To improve first-attempt insertion success rates of internal jugular vein catheterization for STRs. METHODS: Based on the PDCA cycle management method and current situation investigation, the PDCA management objectives were set, and the implementation content, monitoring items and continuous improvement plan were formulated. The data of residents who were trained in the ICU of Fangcun Hospital, Second Affiliated Hospital of Guangzhou University of Chinese Medicine, from January 2016 to April 2016 and managed by the PDCA cycle (PDCA group), were compared with the data of residents trained in the same department from August 2015 to November 2015 before the implementation of PDCA (historic control group), the first-attempt success rate of puncture and catheterization, the duration of puncture and catheterization, and the incidence of complications were analysed. RESULTS: Thirty-six cases of internal jugular vein catheterization were performed by the PDCA group, 21 cases (58%) were performed by residents in the third year of standardized training, and 15 cases (42%) were performed by residents in the second year of standardized training. Compared with the historic control group, there was no significant difference in the seniority of residents (X2 = 0.240, P = 0.625) or the 'majors of the residents (X2 = 1.306, P = 0.835). The first-attempt success rate of puncture in the PDCA group was 94% (34/36), which was significantly higher than that of the historic control group (55% (11/20) (P = 0.001). In the PDCA group, the first-attempt success rate of puncture among third-year standardized training residents was 95% (20/21), and the first-attempt success rate in the second-year was 93% (14/15), which were significantly higher than the corresponding rates of 62% (8/13) and 43% (3/7) respectively, in the historic control group (all P = 0.021). The duration of catheterization was [4 (3,5)] min after PDCA, which was significantly shorter than that in the historic control group [9 (6.25,13.00)] min (Z = - 5.214, P < 0.001). The incidence rate of complications in the PDCA group was 0% (0 /36), which was significantly lower than the rate of 20% (4 / 20) in the historic control group (P < 0.013). CONCLUSION: PDCA cycle management can help improve the first-attempt success rate of internal jugular vein puncture and catheterization, shorten the duration of puncture and catheterization, and reduce the incidence of complications. The idea and method of PDCA cycle management can be applied to other training and management protocols for STRs.


Assuntos
Cateterismo Venoso Central , Veias Jugulares , Cateterismo Venoso Central/efeitos adversos , Humanos , Incidência , Unidades de Terapia Intensiva
5.
Cureus ; 14(5): e24862, 2022 May.
Artigo em Inglês | MEDLINE | ID: mdl-35702478

RESUMO

Port-a-Cath also known as a subcutaneous implantable catheter is a common device used in patients undergoing drug infusions. Port-a-Cath placements are widely used among cancer patients who need multiple intravenous infusions with chemotherapeutic agents. The surgical approach to implanting a Port-a-Cath is associated with risks and benefits; however, it may also be associated with serious complications. We describe a rare case of a large right-sided hemothorax following right internal jugular vein cannulation after Port-a-Cath placement. We discuss possible causes of hemothorax in this patient and describe possible factors such as abnormal anatomy of vessels and body habitus contributing to this complication. We also highlight the use of imaging such as ultrasound-guided techniques and the importance of postoperative chest radiographs to screen for possible complications.

6.
Cureus ; 13(6): e15753, 2021 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-34290931

RESUMO

BACKGROUND: Ultrasound (US)-guided internal jugular vein (IJV) catheterization in newborns is usually performed in the operating room with general anesthesia. This study aimed to show that US-guided IJV catheterization can be successfully performed with local anesthesia and sedation in newborns. METHODS: The files of newborn patients who underwent US-guided IJV catheterization between May 2017 and May 2020 were examined. Two groups were created according to the type of anesthesia applied during the procedure. The general characteristics of the newborns, the success of the procedure, the number of punctures, and the complication rates in both groups were compared. RESULTS: A total of 53 newborns were included in this study. Of the 62 procedures, 30 were performed under general anesthesia (group A) and 32 were performed under sedation (group B). Twenty-six (86.6%) of the newborns in group A and 19 (59.3%) in group B were catheterized at the first puncture. The median puncture numbers in groups A and B were 1 (1-3) and 1 (1-5), respectively. All of the patients in group A were successfully catheterized (n = 30; 100%), and all but one in group B could be catheterized (n = 32; 96.8%). CONCLUSION: No significant differences in complications or procedural success rates were observed between newborns undergoing general anesthesia or sedation. US-guided IJV catheterization can be safely performed with sedation alone.

7.
Egypt Heart J ; 72(1): 19, 2020 Apr 07.
Artigo em Inglês | MEDLINE | ID: mdl-32266513

RESUMO

BACKGROUND: Subclavian artery injury during internal jugular vein catheterization is a rare yet potentially life-threatening complication leading to hemothorax and exsanguination. The percutaneous endovascular approach offers a less invasive and effective alternative to the high-risk surgical repair in emergent situations. CASE PRESENTATION: We present a case of a 6-year-old child suffering from hemolytic uremic syndrome requiring urgent hemodialysis, for which IJV (internal jugular vein) cannulation was attempted. This procedure led to iatrogenic subclavian arterial perforation causing massive hemothorax with hemodynamic compromise. CT angiogram showed a through and through perforation in the first part of right subclavian artery between common carotid and vertebral artery. A definitive assessment of the extent of ongoing leak was made through an invasive angiogram in the catheterization laboratory. The perforation was successfully closed percutaneously with a covered stent without compromising any branch vessels. CONCLUSION: Arterial injury although rare is a potentially life-threatening complication of IJV cannulation which warrants immediate attention and corrective measures. Ultrasound guidance can reduce the risk of such life-threatening complications. Percutaneous management offers a less invasive, less time consuming, and effective alternative in critically ill patients in emergency situations.

8.
Rev. bras. anestesiol ; 69(4): 413-416, July-Aug. 2019. graf
Artigo em Inglês | LILACS | ID: biblio-1042008

RESUMO

Abstract Background and objectives Ultrasound-guided internal jugular vein catheterization is a common and generally safe procedure in the operating room. However, inadvertent puncture of a noncompressible artery such as the subclavian artery, though rare, may be associated with life-threatening sequelae, including hemomediastinum, hemothorax, and pseudoaneurysm. Case report We describe a case of the successful endovascular repair of right subclavian artery injury in a 75-year-old woman. Subclavian artery was injured secondary to ultrasound-guided right internal jugular vein catheterization under general anesthesia for orthopedic surgery. Conclusion Under general anesthesia several factors such as hypotension can mask the signs of subclavian artery injury. This case report indicates that clinicians should be aware of the complications of central venous catheterization and take prompt action.


Resumo Justificativa e objetivos A cateterização da veia jugular interna guiada por ultrassom é um procedimento comum e geralmente seguro em sala cirúrgica. No entanto, a punção inadvertida de uma artéria não compressível, como a artéria subclávia, embora rara, pode estar associada a sequelas e risco para vida, incluindo hemomediastino, hemotórax e pseudoaneurisma. Relato de caso Descrevemos um caso bem-sucedido da correção endovascular de lesão da artéria subclávia direita em uma paciente de 75 anos. A artéria subclávia foi lesionada após cateterização guiada por ultrassom da veia jugular interna direita sob anestesia geral para cirurgia ortopédica. Conclusão Sob anestesia geral, vários fatores, como a hipotensão, podem mascarar os sinais de lesão da artéria subclávia. Este relato de caso indica que os médicos devem estar cientes das complicações da cateterização venosa central e tomar medidas imediatas.


Assuntos
Humanos , Feminino , Idoso , Artéria Subclávia/lesões , Cateterismo Venoso Central/efeitos adversos , Lesões do Sistema Vascular/etiologia , Procedimentos Endovasculares/métodos , Cateterismo Venoso Central/métodos , Ultrassonografia de Intervenção/métodos , Procedimentos Ortopédicos/métodos , Veias Jugulares/diagnóstico por imagem
9.
Braz J Anesthesiol ; 69(4): 413-416, 2019.
Artigo em Português | MEDLINE | ID: mdl-31353065

RESUMO

BACKGROUND AND OBJECTIVES: Ultrasound-guided internal jugular vein catheterization is a common and generally safe procedure in the operating room. However, inadvertent puncture of a noncompressible artery such as the subclavian artery, though rare, may be associated with life-threatening sequelae, including hemomediastinum, hemothorax, and pseudoaneurysm. CASE REPORT: We describe a case of the successful endovascular repair of right subclavian artery injury in a 75-year-old woman. Subclavian artery was injured secondary to ultrasound-guided right internal jugular vein catheterization under general anesthesia for orthopedic surgery. CONCLUSION: Under general anesthesia several factors such as hypotension can mask the signs of subclavian artery injury. This case report indicates that clinicians should be aware of the complications of central venous catheterization and take prompt action.


Assuntos
Cateterismo Venoso Central/efeitos adversos , Procedimentos Endovasculares/métodos , Artéria Subclávia/lesões , Lesões do Sistema Vascular/etiologia , Idoso , Cateterismo Venoso Central/métodos , Feminino , Humanos , Veias Jugulares/diagnóstico por imagem , Procedimentos Ortopédicos/métodos , Ultrassonografia de Intervenção/métodos
10.
Asian J Surg ; 42(1): 362-366, 2019 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-29804710

RESUMO

BACKGROUND: The ipsilateral nipple has been used as a directional guide for needle advance during internal jugular vein (IJV) catheterization. We attempted to validate the utility of the ipsilateral nipple during IJV catheterization. METHODS: One hundred and two patients scheduled for elective surgery were enrolled. In the 15° Trendelenberg position with 30° head rotation, the apex of the triangle formed by the sternocleidomastoid muscle and the clavicle was identified. The angle formed by the line connecting the apex and the ipsilateral nipple and the actual course of the IJV was measured. The distance between the apex of the anatomical triangle and the IJV center identified were measured via ultrasound. RESULTS: The angle formed by the line connecting the apex and the ipsilateral nipple and the IJV was 16 ± 7.6° and was greater in females than males (14.8 ± 1.1 vs 17.4 ± 1.0°, P = 0.043). Regression analysis showed that height, weight, gender, and age did not affect the angle as an independent factor. The apex of the anatomical triangle was 0.5 cm medial to the IJV center and was shorter in females compared to males (0.33 ± 0.12 vs 0.6 ± 0.09 cm, P = 0.039). CONCLUSION: Our study shows that when the needle is inserted at the apex of the anatomical triangle directed towards the ipsilateral nipple, it crosses the IJV at 16°. Since the common carotid artery is usually medial to the IJV, directing the needle towards the ipsilateral nipple seems to be a safe way to avoid the common carotid artery and successfully puncture the IJV.


Assuntos
Cateterismo Venoso Central/métodos , Veias Jugulares , Mamilos/anatomia & histologia , Adolescente , Adulto , Idoso , Idoso de 80 Anos ou mais , Clavícula/anatomia & histologia , Clavícula/diagnóstico por imagem , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Músculo Esquelético/anatomia & histologia , Músculo Esquelético/diagnóstico por imagem , Mamilos/diagnóstico por imagem , Estudos Prospectivos , Caracteres Sexuais , Ultrassonografia , Adulto Jovem
11.
Int J Comput Assist Radiol Surg ; 13(4): 495-505, 2018 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-28861693

RESUMO

PURPOSE: Real-time ultrasound has become a crucial aspect of several image-guided interventions. One of the main constraints of such an approach is the difficulty in interpretability of the limited field of view of the image, a problem that has recently been addressed using mixed reality, such as augmented reality and augmented virtuality. The growing popularity and maturity of mixed reality has led to a series of informal guidelines to direct development of new systems and to facilitate regulatory approval. However, the goals of mixed reality image guidance systems and the guidelines for their development have not been thoroughly discussed. The purpose of this paper is to identify and critically examine development guidelines in the context of a mixed reality ultrasound guidance system through a case study. METHODS: A mixed reality ultrasound guidance system tailored to central line insertions was developed in close collaboration with an expert user. This system outperformed ultrasound-only guidance in a novice user study and has obtained clearance for clinical use in humans. A phantom study with 25 experienced physicians was carried out to compare the performance of the mixed reality ultrasound system against conventional ultrasound-only guidance. Despite the previous promising results, there was no statistically significant difference between the two systems. RESULTS: Guidelines for developing mixed reality image guidance systems cannot be applied indiscriminately. Each design decision, no matter how well justified, should be the subject of scientific and technical investigation. Iterative and small-scale evaluation can readily unearth issues and previously unknown or implicit system requirements. CONCLUSIONS: We recommend a wary eye in development of mixed reality ultrasound image guidance systems emphasizing small-scale iterative evaluation alongside system development. Ultimately, we recommend that the image-guided intervention community furthers and deepens this discussion into best practices in developing image-guided interventions.


Assuntos
Cateterismo Venoso Central/métodos , Sistemas Computacionais , Imagens de Fantasmas , Cirurgia Assistida por Computador/métodos , Ultrassonografia/métodos , Humanos
12.
Indian J Nephrol ; 27(2): 148-150, 2017.
Artigo em Inglês | MEDLINE | ID: mdl-28356671

RESUMO

Internal jugular vein (IJV) catheterization has become the preferred approach for temporary vascular access for hemodialysis. However, complications such as internal carotid artery puncture, vessel erosion, thrombosis, and infection may occur. We report a case of brachial plexus palsy due to compression by right subclavian artery pseudoaneurysm as a result of IJV catheterization in a patient who was under maintenance hemodialysis.

13.
Biomed J ; 39(4): 283-288, 2016 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-27793271

RESUMO

BACKGROUND: Absolute necessity in acute kidney injury (AKI) and ignorance in chronic kidney disease (CKD) make the use of un-cuffed, non-tunneled catheters an indispensable vascular access for hemodialysis. Although these catheters should be inserted under radiological guidance, it may not be feasible in certain circumstances. The aim of the present study was to evaluate safety and outcome of non-imaging assisted insertion of these catheters in internal jugular vein (IJV) for hemodialysis. METHODS: We analyzed 233 attempts of non-imaging assisted un-cuffed, non-tunneled IJV catheterization at our center. The immediate insertion complications, duration of use, rate and type of infection and other complications were assessed. RESULTS: Out of the 233 attempts, 223 (213-right, 10-left) were successful. The most common indication was AKI (n = 127, 54.5%), followed by CKD (n = 99, 42.5%). Successful catheterization at first attempt was achieved in 78.9%. Insertion complications were noted in 12.8% and included arterial puncture (5.2%), hematoma (3.0%) and malposition (2.1%). Amongst 219 catheters followed for 4825 days, the mean duration of use was 22 days. Catheter related infections occurred in 42 patients with an incidence of 8.7 per 1000 catheter days. Bacteraemia was present in 10/36 cases (27.7%), positive catheter tip cultures in 71.4% cases and staphylococcal species were the most common organism. Cumulative hazard analysis by Cox regression revealed a linear increase in the risk for infection with each week. CONCLUSION: Non-imaging assisted insertion of uncuffed, non-tunneled catheters is associated with slightly higher rate of insertion complication but comparable outcome in terms of infection rate or days of use.


Assuntos
Cateteres Venosos Centrais , Veias Jugulares , Cateterismo Venoso Central , Humanos , Incidência , Diálise Renal
14.
Artigo em Inglês | MEDLINE | ID: mdl-26333900
15.
Neurol Res ; 37(7): 578-87, 2015 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-25668478

RESUMO

OBJECTIVES: In severe aneurysmal subarachnoid hemorrhage (aSAH), pathological changes in cerebral energy metabolism can be detected either by local measurements using cerebral microdialysis (cMD) together with brain tissue oxygen probe or by global measurements of arterio-jugular difference performed with retrograde jugular vein catheter. Our main objective was to compare the two methods of detection and assess whether combining biomarkers from both procedures could improve outcome prediction, which has never been studied before. METHODS: This study included 400 sets of paired arterial and jugular venous samples and 3138 brain microdialyzates obtained from 18 poor-grade aSAH patients. Using Glasgow outcome scale (GOS), neurochemical data from unfavorable (GOS 1-3) and favorable (GOS 4-5) outcome groups were compared. RESULTS: The lactate/pyruvate ratio was found as the most sensitive marker for predicting unfavorable outcome (90%), although not specific. In contrast, hypoxic lactate events and those of metabolic ratio (MR) < 3.44, most frequently observed in the unfavorable outcome group than in the favorable one (13.9 vs 0.9% and 33.3 vs 3.75% respectively), were shown to be more specific biomarkers (86%) to predict unfavorable outcome, but less sensitive ( < 70%). The combination of these three biomarkers improved the accuracy of outcome prediction (sensitivity 90% and specificity 71%). DISCUSSION: Both retrograde jugular venous catheterization (RJVC) and cMD contribute to monitor poor-grade aSAH patients. In this preliminary study, we show that these two techniques are complementary and their combination increases the accuracy of outcome prediction.


Assuntos
Encéfalo/metabolismo , Cateterismo/métodos , Aneurisma Intracraniano/metabolismo , Veias Jugulares/metabolismo , Microdiálise/métodos , Hemorragia Subaracnóidea/metabolismo , Adolescente , Adulto , Biomarcadores/metabolismo , Feminino , Escala de Resultado de Glasgow , Humanos , Aneurisma Intracraniano/diagnóstico , Ácido Láctico/metabolismo , Masculino , Pessoa de Meia-Idade , Oxigênio/metabolismo , Prognóstico , Estudos Prospectivos , Ácido Pirúvico/metabolismo , Sensibilidade e Especificidade , Hemorragia Subaracnóidea/diagnóstico
16.
Int J Clin Exp Med ; 8(10): 18543-7, 2015.
Artigo em Inglês | MEDLINE | ID: mdl-26770467

RESUMO

The number of patients requiring chronic hemodialysis via a tunneled cuffed catheter is increasing. The right internal jugular vein (IJV) is generally the preferred site of percutaneous insertion. In certain situations, for example, in patients with a history of multiple access failures, catheterization of the left IJV is an important option. In this report, we present two rare cases of catheter malposition after left IJV catheterization; catheter adjustments, with the help of chest radiographs, resulted in a positive outcome in both cases. These cases exemplify the difficulties associated with left IJV catheterization, of which there are few reports in the published literature.

17.
Artigo em Chinês | WPRIM (Pacífico Ocidental) | ID: wpr-845702

RESUMO

Objective To establish and optimize the rat jugular vein catheterization model in our lab, and perform a crossover study using this model to compare the pharmacokinetic characters of a newly developed midazolam formulation to the existing preparation. Methods Six SD rats (half male and half female) received the right jugular vein catheterization when the rats were sufficiently anesthetized. One week after the operation, all the rats were used to conduct a cross-over double period pharmacokinetic study. Totally1.33 mg/kg midazolam solutions from automatic needle and clinic available injection were adminisered to the jugular vein catheterization rats via im route. The washout period was 5 days. Exact volume of blood samples at designed time points were taken through the catheter. After preparation, the concentrations of midazolam in rat plasma were determined by using established LC-MS/MS method. The corresponding pharmacokinetic parameters were calculated by WinNolin software. Results The rat jugular vein catheterization model was successfully built. Blood was easily sampled and rats were well tolerated, meeting the requirement of repeated blooding. This model solved the bottleneck of cross-over study performed in rats. The pharmacokinetic behavior of newly developed midazolam formulation had no difference with that of clinic injections. The relative bioavailability was around 99% . Conclusion   Rat jugular vein catheterization model is proved to be that of a propagating technique to do the cross-over study and to evaluate the pharmacokinetic characters of novel formulations.

18.
Artigo em Chinês | WPRIM (Pacífico Ocidental) | ID: wpr-467805

RESUMO

Objective To establish and optimize the rat jugular vein catheterization model in our lab, and perform a cross-over study using this model to compare the pharmacokinetic characters of a newly developed midazolam formulation to the existing preparation. Methods Six SD rats (half male and half female) received the right jugular vein catheterization when the rats were sufficiently anesthetized. One week after the operation, all the rats were used to conduct a cross-over double period pharmacokinetic study. Totally1.33 mg/kg midazolam solutions from automatic needle and clinic available injection were adminisered to the jugular vein catheterization rats via im route. The washout period was 5 days. Exact volume of blood samples at designed time points were taken through the catheter. After preparation, the concentrations of midazolam in rat plasma were determined by using established LC-MS/MS method. The corresponding pharmacokinetic parameters were calculated by WinNolin software. Results The rat jugular vein catheterization model was successfully built. Blood was easily sampled and rats were well tolerated, meeting the requirement of repeated blooding. This model solved the bottleneck of cross-over study performed in rats. The pharmacokinetic behavior of newly developed midazolam formulation had no difference with that of clinic injections. The relative bioavailability was around 99%. Conclusion Rat jugular vein catheterization model is proved to be that of a propagating technique to do the cross-over study and to evaluate the pharmacokinetic characters of novel formulations.

19.
Artigo em Chinês | WPRIM (Pacífico Ocidental) | ID: wpr-499963

RESUMO

Objective To explore the most effective formula to predict the catheterization length of the right internal jugular vein by an-terior approach. Methods Sixty-seven cases performed with right internal jugular vein catheterization from January 2013 to June 2013 were enrolled in this study and 4 formulas were selected to predict the catheterization lengths. Comparing their predicted lengths with the actual lengths defined as the lengths of the internal catheters which terminals were inserted to a accurate position,and analyse their predictive validi-ty. Results The predictive error percentages of the 4 formulas were all less than 15%. Comparing the predicted lengths and the actual lengths, there was no difference between the predicted length of the 1st formula and the actual one(P>0. 05),and the predicted lengths of the other three formulas were significantly less than the actual ones(P0. 05). Conclusion The predictive error of all the 4 formulas is less than 15%, and the 1st formula is simple,practical and associated with a much smaller error,more suitable to estimate the length of the right internal jugular vein catheterization by anterior approach.

20.
Indian J Crit Care Med ; 12(4): 201-3, 2008 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-19742265

RESUMO

A rare malposition of central venous catheter in the left superior intercostal vein is described. The diagnostic features and the possible ways to prevent this complication are discussed.

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