Eventos adversos durante transporte intra-hospitalar de pacientes críticos em hospital de grande porte / Adverse events during intrahospital transport of critically ill patients in a large hospital

RESUMO Objetivo: Descrever a incidência de eventos clínicos e não clínicos durante o transporte intra-hospitalar de pacientes críticos e analisar os fatores de risco associados. Métodos: Estudo de coorte, com coleta retrospectiva, no período de outubro de 2016 a outubro de 2017, tendo sido analisados todos os transportes intra-hospitalares para fins diagnósticos e terapêuticos em hospital de grande porte, que contava com seis unidades de terapia intensiva adulto, sendo avaliados os eventos adversos e os fatores de risco relacionados. Resultados: No período, foram realizados 1.559 transportes intra-hospitalares, em 1.348 pacientes, com média de idade de 66 ± 17 anos, tempo médio de transporte de 43 ± 34 minutos. Durante o transporte, 19,8% dos pacientes estavam em uso de drogas vasoativas; 13,7% em uso de sedativos e 10,6% estavam sob ventilação mecânica. Eventos clínicos ocorreram em 117 transportes (7,5%) e não clínicos em 125 transportes (8,0%). Falhas de comunicação foram prevalentes, no entanto, aplicando-se análise multivariada, uso de sedativos, noradrenalina e nitroprussiato, e o tempo de transporte maior que 36,5 minutos estiveram associados a eventos adversos clínicos. Uso de dobutamina e tempo de transporte superior a 36,5 minutos estiveram associados a eventos não clínicos. Ao final do transporte, 98,1% dos pacientes apresentaram condições clínicas inalteradas em relação ao seu estado basal. Conclusão: Transportes intra-hospitalares estão relacionados à alta incidência de eventos adversos; o tempo de transporte e a utilização de sedativos e drogas vasoativas estiveram relacionados a esses eventos.

ABSTRACT Objective: To describe the incidence of clinical and non-clinical events during intrahospital transport of critically ill patients and to analyze the associated risk factors. Methods: Cohort study with retrospective data collected from October 2016 to October 2017. All cases of intrahospital transport for diagnostic and therapeutic purposes in a large hospital with six adult intensive care units were analyzed, and the adverse events and related risk factors were evaluated. Results: During the study period, 1,559 intrahospital transports were performed with 1,348 patients, with a mean age of 66 ± 17 years and a mean transport time of 43 ± 34 minutes. During transport, 19.8% of the patients were using vasoactive drugs; 13.7% were under sedation; and 10.6% were under mechanical ventilation. Clinical events occurred in 117 transports (7.5%), and non-clinical events occurred in 125 (8.0%) transports. Communication failures were prevalent; however, the multivariate analysis showed that the use of sedatives, noradrenaline and nitroprusside and a transport time greater than 36.5 minutes were associated with adverse clinical events. The use of dobutamine and a transport time greater than 36.5 minutes were associated with non-clinical events. At the end of transport, 98.1% of the patients presented unchanged clinical conditions compared with baseline. Conclusion: Intrahospital transport is related to a high incidence of adverse events, and transport time and the use of sedatives and vasoactive drugs were related to these events.

Nitroprusiato: una droga confiable para la estimación de la reserva de flujo fraccional coronario / Nitroprusside: a reliable drug for fractional flow reserve assessment

La angiografía coronaria permanece como "gold standard" para el diagnóstico y toma de decisiones en la enfermedad coronaria. Sin embargo, la significación de lesiones con estenosis de 50-70 por ciento es difícil. La medición de la reserva de flujo fraccional (FFR) es una herramienta útil para dilucidar esta interrogante. Generalmente se usa adenosina (A) en bolo intracoronario para inducir máxima vasodilatación y hay poca evidencia para drogas alternativas con este objeto. En este estudio evaluamos el uso de nitroprusiato (N) como droga alternativa. Métodos y Resultados: Se efectuó un estudio clínico aleatorizado. A (120 ug IC) y posteriormente N (50 ug IC), o vice-versa, se usaron para evaluar cada lesión. Se evaluaron 60 lesiones en 44 pacientes (24 hombres) de 63.5 +/- 9.6 años, con masa corporal 28.95 +/- 3.32 kg/m2. Las lesiones se localizaron en arteria descendente anterior en 46.7 por ciento, coronaria derecha en 26.7 por ciento, circunfleja en 11.7 por ciento y 13.9 por ciento en las otras arterias. La estenosis coronaria promedio evaluada por angiografía cuantitativa fue 49.5 por ciento (95 por ciento CI: 46.5 - 52.5 por ciento). La presión arterial media (PAM) basal fue similar en ambos grupos (pre - A: 106.5 +/- 18.2 mmHg, pre - N: 105.6 +/- 18.8 mmHg, NS) o después de A, pero se observó un descenso transitorio después de NP (descenso promedio de 12.5 mmHg, 95 por ciento CI: 9.2 a15.7 mmHg, 2p < 0.001). Este efecto estaba asociado a la hiperemia prolongada lograda con N. (duración de hiperemia con N: 39.2 +/- 8.7 s., y con A of 15.3 +/- 3.2 s. 2p < 0.001). Hubo excelente correlación entre los resultados de A y de N respecto de FFR (r 0.986)...

Abstract: Coronary angiography remains the gold standard for diagnosing coronary artery disease and making therapeutic decisions. However the significance of intermediate lesions (between 50-70%) is difficult to evaluate. Fractional flow reserve (FFR) measurement is an important tool for the evaluation of these lesions. To achieve maximum vasodilatation, Intracoronary (IC) bolus or a continuous intravenous infusion of (A) is usually used. There is very little data for an alternative drug. The aim of this study was to evaluate Sodium nitroprusside (N) 50 IC bolus as an alternative to A for to determine FFR.Method and Results: A multicentric, randomized clinical trial was conducted. A, (120 IC) and subsequently N (50 IC) or vice versa was used for every lesion. 60 coronary lesions were evaluated in 44 patients (24 men and 20 women), mean age 63.5 ± 9.6 years and BMI 28.95 ± 3.32 kg/m2. The lesions were located in the left anterior descending artery in 46.7% of patients, the right coronary in 26.7%, the circumflex in 11.7% and others in 13.9%. Mean coronary artery stenosis as assessed by quantitative coronary angiography (QCA) was 49.5% (95% CI: 46.5 - 52.5%).The mean arterial pressure (MAP) was similar in groups at baseline.(pre - A: 106.5 ± 18.2 mmHg, pre - N: 105.6 ± 18.8 mmHg, NS), or after A, but there was a transient decrease in MAP when N was administered (average decline of MAP: 12.5 mmHg, (95% CI: 9.2 to 15.7 mmHg, 2p < 0.001). This effect was due to the prolonged hypere-mia time achieved with the drug (hyperemia duration with nitroprusside 39.2 ± 8.7 sec. and with adenosine of 15.3 ± 3.2 sec. 2p < 0.001). We could demonstrate an excellent correlation between IC nitroprusside and IC adenosine with regard to FFR measurement, (correlation coefficient = 0.986, p < 0.001)...

Terapia da insuficiência cardíaca avançada ajustada por objetivos hemodinâmicos obtidos pela monitorização invasiva / Advanced heart failure therapy adapted to hemodynamic objectives acquired from invasive hemodynamic monitoring

OBJETIVO: Avaliar o tratamento da insuficiência cardíaca (IC) avançada em relação à redução das pressões de enchimento ventricular, com a utilização de doses maiores de vasodilatadores, através da monitorização hemodinâmica invasiva. MÉTODOS: Foram estudados 19 pacientes com IC avançada, nos quais foi instalado o cateter de Swan-Ganz para guiar a administração de diurético intravenoso (IV) e nitroprussiato de sódio, com o objetivo de se reduzir de forma significativa as pressões de enchimento ventricular. Depois de alcançado esse objetivo ou 48 horas, foram introduzidas drogas orais até serem retirados os fármacos venosos, mantendo o benefício hemodinâmico. RESULTADOS: Dos 19 pacientes estudados, 16 (84 por cento) eram do sexo masculino. A idade média foi de 66 ± 11,4 anos; a fração de ejeção média foi de 26 ± 6,3 por cento; 2 pacientes (10,5 por cento) apresentavam classe funcional (CF) III e 17 (89,5 por cento), CF IV. Houve queda da pressão de oclusão da artéria pulmonar de 23 ± 11,50 mmHg para 16 ± 4,05 mmHg (p=0,008), do índice de resistência vascular sistêmica de 3.023 ± 1.153,71 dynes/s/cm-5/m² para 1.834 ± 719,34 dynes/s/cm-5/m² (p=0,0001) e aumento do índice cardíaco de 2,1 ± 0,56 l/min/m² para 2,8 ± 0,73 l/min/m² (p=0,0003). Um subgrupo com hipovolemia foi identificado. CONCLUSÃO: Foi possível reduzir as pressões de enchimento ventricular para valores significativamente menores, obtendo melhora significativa do índice cardíaco, do índice de resistência vascular sistêmica e da pressão média da artéria pulmonar, utilizando-se doses significativamente maiores de vasodilatadores.

Ergotamine-Induced Upper Extremity Ischemia: A Case Report

Ergotamine-induced limb ischemia is an extremely rare case. We present a case of a 64-year-old man, who developed ischemia on the right upper extremity due to long-term use of Ergot for migraine headache. Angiography revealed diffused, smooth, and tapered narrowing of the brachial artery. The patient was successfully treated with intravenous nitroprusside.

Clinical profile of severe scorpion envenomation in children at rural setting.

he present study is an attempt to evaluate the clinical manifestations of severe scorpion sting in children and their management at a rural setting. Twelve patients with severe scorpion sting referred from primary health center are presented in this report. Eight children had pulmonary edema and hypotension; two had pulmonary edema and hypertension while one each presented with hypertension and tachycardia in isolation. Oral prazosin, dobutamine infusion and sodium nitroprusside drip (SNP) were used as therapeutic options based on the symptomatology. Two children died of massive pulmonary edema despite use of SNP and dopamine drip. Anti scorpion venom did not prevent the cardiovascular manifestations of severe scorpion sting. Early administration of prazosin alleviated the severity of scorpion envenomation

Intraventricular sodium nitroprusside therapy: a future promise for refractory subarachnoid hemorrhage-induced vasospasm.

A prospective study was carried out to evaluate the efficacy of intraventricular sodium nitroprousside (SNP) in the reversal of refractory vasospasm secondary to aneurysmal subarachnoid hemorrhage (SAH). Ten patients of aneurysmal SAH with symptomatic vasospasm, corroborated on Transcranial Doppler (TCD) and/or angiography, were included in the study. The mean age distribution of the patients was 50.8 years (range 33-65 years) with an equal number of males and females. Once vasospasm was refractory even after 12 hours of SAH therapy, intraventricular SNP was instilled in an escalating dose and the reversal of vasospasm was monitored on TCD and/or angiography. All patients showed improvement in TCD velocity on day 0 through day 3. Partial to complete reversal of vasospasm was demonstrated on angiography in all the patients, though not in all the vessels. Two patients who had weakness of limbs due to vasospasm improved following intraventricular SNP therapy. Vomiting was the commonest adverse effect (7/10). Three patients had mild fluctuation in blood pressure. The overall outcome was good in 6 out of 10 patients. The study suggests that intraventricular SNP therapy is effective in reversing the changes even in established cases of SAH-induced vasospasm.

Crisis de esclerodermia renal: rol de la vasculopatía esclerodérmica en la inducción de fibrosis cutáneo-visceral en dos casos / Renal scleroderma crisis: role of sclerodermic vasculopathy in the induction of cutaneous and visceral fibrosis: report of 2 cases

Although fibrosis and vasculopathy coexist in most patients with progressive systemic sclerosis, it is not clear if these events are the result of an unique etiologic factor or if one is consequence of the other. We report two cases of progressive systemic sclerosis that evolved to a renal scleroderma crisis. A 36 years old female presented with a Sjögren syndrome and painful subcutaneous nodules whose biopsy showed perivascular lymphocytic infiltration, perivascular thickening and normal skin. The ESR was 100 mm/h. She developed an hypertensive crisis and progressive renal failure, followed by a rapidly evolving progressive systemic sclerosis. The patient died in the course of this crisis. A 32 years old female with a progressive systemic sclerosis refractory to D-penicillamine treatment, receiving cyclosporin, presented a renal scleroderma crisis, that was successfully treated, with complete recovery of renal function. We highlight the different evolution of these cases, probably due to an early diagnosis and a better experience in the management of this condition

Estudio comparativo con clonidina y propanolol en pacientes llevados a rinoseptoplastía / Comparative trial between chlonidine and propanolol in patients who submitted to rhinoseptoplasty

Se les practicó renoseptoplastía bajo anestesia general balanceada e hipotensión arterial controlada, a 32 pacientes de uno y otro sexo, en buenas condiciones generales. Fueron divididos en dos grupos, al primero se le prescribió por vía oral, como medicación preanestésica 3 µg/kg de peso de clorhidrato de clonidina y el segundo grupo recibió por vía oral 0.5 mg/kg de peso de propranolol la noche anterior y una hora antes de la inducción anestésica. La clonidina se consideró un excelente coadyuvante de la anestesia general para inducir hipotensión controlada, requiriéndose ocasionalmente como fármaco de refuerzo, mínimas cantidades de nitroprusiato de sodio para mantener la presión arterial media en 50 Trr

Efectos de la hemodilución normovolémica sobre la presión arterial central y periférica / Effects of the normovolemic hemodilution on central and peripheral blood pressure

Estudiamos el efecto de la hemodilución normovolémica sobre la presión arterial y periférica. A once perros anestesiados con pentobarbital y ventilados mecánicamente se les midió con catéteres Millar la presión arterial central y periférica, ubicando transductores en aorta y arteria femoral superficial respectivamente. En aorta torácica se instaló transductor electromagnético de flujo. Se administró fenilefrina (FNF) 0,4 y 1 µg/kg. y nitroprusiato (NTP) 2 y 4 µg/kg. Se midió presiones asistólica, diastólica y media, tanto central como periférica, así como flujo medio y presión crítica de cierre (PCC). La PCC se determinó por extrapolación del decaimiento exponencial de la presión arterial cuando el flujo sanguíneo se detuvo mecánicamente. Estas mediciones se realizaron en condiciones basal y alcanzado el máximo efecto de las drogas. Luego se realizó hemodilución extrayendo 30 a 35 ml/kl de sangre, y reponiendo suero fisiológico temperado, manteniendo constante la presión arterial sistólica. Finalmente se procedió a repetir las drogas vasoactivas y las mediciones hemodinámicas respectivas. La hemodilución disminuyó la PCC y la resistencia, con el consecuente aumento el flujo, sin alterar la presión arterial media. La disminución en la resistencia ocurrió independientemente de si en su cálculo se consideró o no la PCC. los efectos de FNF y NTP sobre la presión arterial central y periférica estuvieron de acuerdo a su farmacología y se mantuvieron después de la hemodilución. Sin embargo, hemodilución más NTP disminuyó la diferencia entre las presiones arteriales sistólicas periférica central. Estos resultados nos sugiere que la PCC está determinada, en parte, por las características reológicas de sangre

Efectos cardiovasculares del óxido nítrico a nivel espinal en ratas anestesiadas / Cardiovascular effects of spinal nitric oxide in anesthetized rats

En ratas anestesiadas con pentobarbital, la inyección intratecal del precursor de la síntesis de óxido nítrico, la L-arginina (10 y 20 µmoles), produjo una disminución en la presión arterial media, mientras que el inhibidor de la síntesis de óxido nítrico, el NG-nitro-L-arginina metil éster (L-NAME: 0,1-10 µmoles) produjo un efecto presor dosis-dependiente. La respuesta presora al L-NAME fue prevenida por el pretratamiento con L-arginina. Los isómeros inactivos (D-NAME y D-arginina) no modificaron la presión arterial media. El dador de óxido nítrico, nitroprusiato de sodio (0,125-0,250 µmoles) indujo una respuesta hipotensora seguida por un efecto presor. La respuesta dual al nitroprusiato de sodio, como así también el efecto hipotensor de L-arginina fueron abolidos por un inhibidor de la guanilato ciclasa, el azul de metileno (0,30 µmoles, inyección intratecal). El bloqueo de la transmisión nicotínica ganglionar con hexametonio (10 mg/kg, i.v.) redujo los efectos hipotensores de L-arginina y nitroprusiato de sodio y previno casi totalmente los efectos presores de L-NAME y nitroprusiato de sodio. El efecto presor del L-NAME fue abolido por el antagonista de receptores de glutamato de tipo NMDA, el ácido 2-amino-5-fosfonovalérico (AVP: 30 nmoles, inyección intratecal). Estos resultados sugieren que en la médula espinal de ratas anestesiadas con pentobarbital, el óxido nítrico produce efectos tanto inhibitorios como excitatorios sobre la actividad preganglionar simpática relacionada con el control de la presión arterial. La síntesis de óxido nítrico estaría tónicamente activada a través de la estimulación de receptores a glutamato de tipo NMDA

Comparison of sodium nitroprusside added peritoneal dialysis and standard haemodialysis.

Thirty patients of acute or acute on chronic renal failure (ACRF) were randomly divided into two group of 15 cases each. Group A patients received 36 cycles of intermittent peritoneal dialysis (PD) with an exchange volume of one litre and duration of one hour per cycle. The 36 cycles of PD were divided into 12 clearance periods of 3 cycles each. Sodium Nitroprusside (SNP) was added in a dose of 4 mg/litre of dialysate in alternate clearance periods. Group B patients were given 4 hours of haemodialysis (HD) to compare the efficacy of two modes of dialysis. Symptomatic relief was observed in various uraemic signs and symptoms like vomiting, level of consciousness, fluid overload, hiccough and asterexis in most of the patients in both the groups. The percentage fall in blood urea and serum creatinine was 57.02 Vs 58.04 mg% and 46.9 Vs 47.8 mg% in group A and B respectively (P 70.5 each). Total dialysate urea removal following PD and HD was 118.8 +/- 57.3 gm and 98.5 +/- 37.0 gm respectively and also there was no significant difference in total creatinine removal. No untoward effects were observed with PD. However, following HD, 5 patients developed hypotension, supraventricular tachycardia was observed in one and disequilibrium syndrome in 8 of them. Therefore, it can be concluded that SNP added PD is comparable to 4 hours of haemodialysis both clinically as well as biochemically and in situations where facilities for HD do not exist or it is contraindicated, PD may be preferred mode of therapy.

Effect of intraperitoneal administration of sodium nitroprusside on the efficacy of peritoneal dialysis.

A prospective randomised trial of intraperitoneal sodium nitroprusside (SNP) administration on the efficacy of acute intermittent peritoneal dialysis was carried out in 40 adult patients of acute or acute on chronic renal failure. A total of 36 cycles of peritoneal dialysis (PD) with an exchange volume of 1 litre and duration of 1 hour per cycle were given to each patient. The 36 cycles of PD were divided into 12 clearance periods (I-XII) of 3 cycles each. SNP was added in a dosage of 4 mg/l of dialysate in clearance period II, IV, VI and VIII. Of 40 patients, 20 were subjected to standard PD (Gp A) while the other 20 received SNP added PD (Gp B). The peritoneal clearance of urea, creatinine, percentage fall of blood urea, serum creatinine and protein loss during the various clearance periods were compared in the two groups. It was observed that group B patients had significantly higher peritoneal clearance and the percentage reduction in the blood levels of urea and creatinine. Protein loss per clearance period was also significantly higher in group B patients. Twenty two cycles of SNP added PD were as effective as 36 cycles of standard PD. No systematic untoward effects of SNP were observed. It is therefore, concluded that intraperitoneal SNP administration is a safe and effective way of increasing the efficacy of PD thus reducing the duration of treatment.

Hipotensión inducida transitoria: nitroprusiato de sodio vs hidralazina / Transoperative induced hypotension: a comparative study between hydralasine and sodium nitropuside

Se presenta un estudio prospectivo y longitudinal en un total de 20 pacientes (N=20), divididos en dos grupos, correspondiendo el grupo 1, (n=10), a los pacientes a los cuales se le administró Hidralazina endovenosa (9.6 mg ñ 0.96) y el grupo 2 (n= 10) a los pacientes a los cuales se les administró Nitroprusiato de Sodio en infusión (1.3 ñ 0.70 mg/kg/min); ambos medicamentos fueron administrados en la fase transoperatoria con la finalidad de producir hipotensión inducida. Fueron analizados los resultados, mediante prueba t de Student observándose diferencias significativas con p > 0.05, en la presión arterial diastólica final y en la presión arterial media final así como en el tiempo de latencia de los fármacos y en el tiempo de duración de la hipotensión; no se encontraron diferencias significativas en las variables del patrón gasométrico, y en las del gasto urinario (p> 0.05). Se sugiere el uso de la hidralazina como alternativa en los procedimientos de hipotensión Inducida transoperatoria

Toxicidade pelo tiocianato decorrente do uso prolongado de nitroprussiato de sódio na insuficiência cardíaca grave / Thiocyanate toxicity arising from prolonged use of sodium nitroprusside in severe heart failure

PURPOSE--To evaluate the toxicity of thiocyanate induced by the infusion of sodium nitroprusside in patients with severe congestive failure. METHODS--We studied 23 patients with congestive heart failure, in class IV (NYHA) under continuous infusion of sodium nitroprusside with doses varying between 0.5 and 5.5 micrograms/kg/min. Clinical evaluation, thiocyanate serum dosage and laboratorial evaluation of renal, hepatic and pulmonary functions were done. RESULTS--Seventeen patients (74 per cent) presented toxic levels of thiocyanate (over 10 micrograms/ml), with the average of 29.9 +/- 4.4 micrograms/ml. Only renal function was related to the presence of intoxication. Clinical evaluation was not accurate to diagnose the thiocyanate toxicity in the patients. CONCLUSION--Sodium nitroprusside is potentially toxic, especially when the renal function is abnormal. Thiocyanate dosage is useful in diagnosing nitroprusside induced toxicity and then it contributes to an adequate treatment and prevention of clinical toxicity

Baroreceptor reflex function in rats submitted to chronic inhibition of nitric oxide synthesis

1. The chronic inhibition of nitric oxide synthesis by N omega-nitro-L-arginine-methyl ester (L-NAME) leads to arterial hypertension accompanied by a significant increase in cardiac sympathetic tone and an almost complete abolition of the vagal tone in conscious adult male Wistar rats. The main aim of the present study was to examine the baroreceptor heart rate reflex function in L-NAME-treated rats (N = 10). 2. Spontaneous daily oral intake of L-NAME (1 mg/ml for 6 days) caused marked hypertension and tachycardia (176 +/- 5 mmHg and 418 +/- 16 bpm), when compared to untreated rats (111 +/- 2 mmHg and 354 +/- 8 bpm). 3. Baroreflex gain was determined in conscious freely moving rats by sigmoidal curve fitting analysis using alternate intravenous injections of phenylephrine (0.2-10.0 micrograms/kg) and sodium nitroprusside (0.5-20.0 micrograms/kg) to produce pressor-induced bradycardia and depressor-induced tachycardia, respectively. The baroreflex gain (sensitivity) was significantly enhanced in L-NAME-treated rats compared to control rats (10.9 +/- 2.5 vs 4.5 +/- 0.3 bpm/mmHg, respectively) mainly due to exaggerated reflex bradycardia responses to increases in arterial hypertension. 4. The data indicate that chronic inhibition of nitric oxide synthesis enhances the bradycardic component of the baroreflex function