Control de la ventilación y regulación del estado ácido-base del pez al hombre / Control of ventilation and regulation of acid-base status from fish to man

RESUMEN Este artículo analiza ciertos aspectos evolutivos en el intercambio gaseoso, el desa rrollo pulmonar, la bomba respiratoria, el estado ácido-base y el control de la ventila ción en relación con un evento trascendente: el pasaje de la vida acuática a la terres tre. Su estudio puede permitir comprender ciertos aspectos con los que lidiamos en la práctica clínica: ¿Por qué las personas con debilidad muscular respiratoria extrema respiran como ranas (respiración frog)?, ¿Por qué los recién nacidos con dificultad respiratoria tienen aleteo nasal y quejido espiratorio?, ¿cómo es posible que los mús culos abdominales, típicamente espiratorios, asistan a la inspiración en casos de la parálisis diafragmática?, ¿por qué en la insuficiencia respiratoria el patrón respiratorio tiene menos variabilidad y se torna más rígido? y, por último, ¿es posible imaginar un pH neutro que no tenga el valor de 7,0, para qué sirve este conocimiento y como se deben interpretar los gases en hipotermia? La transición del agua a la tierra es una de las más importantes e inspiradoras de las grandes transiciones en la evolución de los vertebrados. Ante la sorprendente diversi dad de organismos vivos, es tentador imaginar una cantidad enorme de adaptaciones evolutivas para resolver los diferentes desafíos que cada especie tiene para la vida en la tierra. Hay desarrollos tempranos que comparten algunos factores cruciales y algunas de las redes genéticas regulatorias cercanas y lejanas están conservadas. Somos testigos de hallazgos clínicos que son el testimonio de especies que han vivido en épocas remotas y nos han legado su historia evolutiva.

ABSTRACT This article analyzes certain evolutionary aspects of gas exchange, lung development, the respiratory pump, the acid-base status and control of ventilation in relation to a significant event: the passing from aquatic to terrestrial life. By studying this, we can understand certain aspects that are present in the clinical practice: Why do people with extreme respiratory muscle weakness breathe as frogs? (frog breathing); why do newborns with breathing difficulties have nasal flaring and expiratory grunting?; how is it possible that abdominal muscles, which are typically expiratory, assist with inspira tion in cases of diaphragmatic paralysis?; why does the breathing pattern of respiratory failure has less variability and becomes more rigid? and, finally, is it possible to imagine a neutral pH that doesn't have the 7.0 value?; what's the use of this knowledge, and how should gases in hypothermia be interpreted? Water-to-land transition is one of the most important and inspiring major transitions of vertebrate evolution. Given the amazing diversity of living organisms, it is tempting to imagine an enormous amount of evolutionary adaptation processes to solve the different challenges of living on earth faced by each species. There are certain early development processes that share some crucial factors, and some of the close and distant gene regulatory networks are conserved. We are witnesses of clinical findings that serve as testimony of the species that lived in remote times and left us their evo lutionary history.

Male Sjogren抯 syndrome presenting with respiratory paralysis due to hypokalemia

Respiratory paralysis due to hypokalemia is a rare entity in Sjogren抯syndrome. Apart from distal renal tubular acidosis (RTA) and hypokalemia the clinical symptoms like dryness of eye, mouth and parotid swelling were absent in our case. Due to this rarity in this pattern of presenting the symptoms, the differential diagnosis of autoimmune disease is often missed and it will eventually end up in a fatal condition. Hypokalemia causes muscle weakness gradually and there will be sudden onset of respiratory paralysis which could be dangerous to the individual. Although there is the presence of rare combination of symptoms clinical history, blood gas analysis, urine analysis and ANA profile will help in the appropriate diagnosis. Herewe report a rare case of male Sjogren抯 syndrome presenting with respiratory paralysis due to hypokalemia.

Bilateral diaphragmatic paralysis and Lyme neuroborreliosis. Ten-years of follow-up / Parálisis diafragmática bilateral y neuroborreliosis de Lyme. Diez años de seguimiento

Abstract Borrelia burgdorferi infection (Lyme disease) is one of the few identifiable causes of neuralgic amyotrophy (AN). Bilateral diaphragmatic paralysis is considered rare in borreliosis, and the pattern of long-term recovery of diaphragm function is also uncertain. Transdiaphragmatic pressure is the gold standard for diagnosing bilateral diaphragmatic paralysis, a study that has been reported on a few occasions. We pres ent a case of AN associated with borrelia infection and bilateral diaphragmatic paralysis that provides a detailed follow-up of the spirometric evolution, the maximum static pressures in the mouth, and the transdiaphragmatic pressure from the onset of symptoms and in the long term. This case allows us to know one of the possible evolutionary profiles of diaphragmatic dysfunction in AN due to borreliosis.

Resumen La infección por Borrelia burgdorferi (enfermedad de Lyme) es una de las pocas causas identificables de amiotrofia neurálgica. La parálisis diafragmática bilateral es considerada rara en la borreliosis y el patrón de recuperación a largo plazo de la función del diafragma también es incierto. La presión transdiafragmática es el patrón de oro para el diagnóstico de parálisis diafragmática bilateral, un estudio que ha sido informado en pocas ocasiones. Se presenta un caso de amiotrofia neurálgica asociado a infección por Borrelia y parálisis diafrag mática bilateral, que aporta un seguimiento detallado de la evolución espirométrica, de las presiones estáticas máximas en la boca y de la presión transdiafragmática desde el inicio de los síntomas y a largo plazo. Este caso permite conocer uno de los posibles perfiles evolutivos de la disfunción diafragmática en la amiotrofia neurálgica por borreliosis.

A study of 50 cases of Organophosphorus poisoning and its complications

Background: In developing countries, the widespread use of organophosphorus compounds (OPCs) has been accompanied by increasing incidence of poisoning with these agents, both suicidal and accidental. This is attributed mainly to their easy availability, indiscriminate handling, storage and lack of knowledge about the serious consequences of poisoning. Of the various substance used for suicidal attempts in India, OPCs form a significant group. Since the clinical manifestation of OPC poisoning is diverse ranging from mild symptoms to fatal complications in the course of time, we need proper management of the situation. Materials and methods: We studied 50 patients of organophosphorus poisoning. We checked vital parameters, general examination and systemic examination. We also checked for various parameters on like cholinesterase level, complete blood counts, renal function test with electrolytes, liver function test. Results: In this study majority of patients fell in 20-30 years of age group with male predominance from lower and middle socio-economical class and most common reason was suicidal. Precipitating event were domestic problem, marital friction and financial problem. Most common clinical features were vomiting, miosis and giddiness. Majority of the patients belonged to mild grade. The average S.cholinesterase level was low as severity increases. More doses of PAM and atropine are required in severe poisoning. Most common complication was respiratory paralysis. Death was more in severe poisoning. Conclusion: OPC is one of the most common poisoning in India. Reason for poisoning is most commonly suicidal. It is common in male with low socio-economical class mainly due to domestic Janak Chokshi, Kothi Zuber Suleman, Bhavikkumar Prajapati. A study of 50 cases of Organophosphorus poisoning and its complications. IAIM, 2019; 6(1): 16-22. Page 17 problems, financial issue and unhappy married life. In patients of OP poisoning presenting symptoms and S.ChE level directly correlated with severity. Therapeutic required dose of PAM and atropine are different in different grade of severity. Survival amongst patients is definitely better if atropine and PAM are being given with Mechanical ventilator support in cases of respiratory insufficiency.

Clinical and laboratory diagnosis of congenital Zika virus syndrome and diaphragmatic unilateral palsy: case report / Diagnostico clínico e laboratorial do Zika vírus congênito e paralisia diafragmática unilateral: o relato de um caso

Abstract Introduction: several birth defects associated to congenital Zika virus infection have been reported, although the clinical features have not been fully characterized. Description: this is the first case report on unilateral diaphragmatic paralysis diagnosed on a neonate with congenital Zika confirmed by the examination of the amniotic fluid through polymerase chain reaction (ZIKV RT-PCR) and the examination of cerebrospinal fluid by serological test (IgM ZIKV-ELISA) after birth. The main manifestations detected by intrauterine ultrasound were: microcephaly, ventriculomegaly, intracranial calcifications, enlarged cisterna magna, increased amniotic fluid index and fetal akinesia syndrome. The newborn had acute respiratory failure in the first hours of life, requiring mechanical ventila-tion. The X- ray of the chest showed unilateral diaphragmatic paralysis and cardiomegaly. Discussion: diaphragmatic palsy in congenital Zika has not been previously reported, the etiopathogenic mechanisms of this event in congenital Zika virus needs to be elucidated.

Resumo Introdução: apesar de vários defeitos de nascimento associados à infecção congênita pelo Zika vírus terem sido descritos, o quadro clínico ainda não foi completamente caracterizado. Descrição: este é o primeiro relato de caso de paralisia diafragmática unilateral em um neonato com diagnóstico confirmado de Zika congênita pelo exame do líquido amniótico utilizando a reação da polimerase em cadeia (ZIKV PCR-RT) e pelo exame sorológico do líquido cefaloraquidiano (ZIKV IgM-ELISA), após o nascimento. As principais manifestações detectadas pela ultrassonografia intraútero no período gestacional foram: microcefalia, ventriculomegalia, calcificações intracranianas, cisterna magna alargada, aumento do índice de liquido amniótico e síndrome da acinesia fetal. O recém-nascido apresentou falência respiratória aguda nas primarias horas de vida, necessitando de ventilação mecânica. A radiografia de tórax realizada mostrou paralisia diafragmática unilateral e cardiomegalia. Discussão: a paralisia diafragmática na Zika congênita não havia sido previamente relatada, havendo a necessidade de investigação dos mecanismos etiopatogênicos dessa manifestação na infecção congênita pelo Zika vírus.

Síndrome intermedio en intoxicación aguda por organofosforados: reporte de caso / Intermediate syndrome in acute organophosphorus poisoning: a case report

La intoxicación con organofosforados es una de las más frecuentes en seres humanos, debido a la amplia disponibilidad de estas sustancias en el mercado de los países en desarrollo. Además de las crisis colinérgicas, esta intoxicación puede generar cuadros de compromiso neuromuscular después de la exposición aguda. Entre ellos, se encuentra la parálisis tipo dos o síndrome intermedio, una alteración que produce una alta morbimortalidad porque compromete los músculos de la caja torácica, lo que lleva a una parálisis respiratoria. Este artículo presenta una paciente de 16 años, remitida a la Clínica Universitaria Bolivariana (CUB), tras una intoxicación con organofosforados, quien fue ingresada a urgencias en un síndrome colinérgico agudo. Después de la administración de atropina, desarrolla como complicación temprana el síndrome intermedio, lo que obligó al manejo con ventilación mecánica durante la fase de compromiso ventilatorio. Durante la recuperación, se evidencia que el compromiso neuromuscular involucra las cuatro extremidades, el cual se va recuperando sin ningún tipo de intervención farmacológica, como fenómeno característico en este tipo de compromisos.

Organophosphate poisoning is one of the most frequent intoxications in human beings, due to the wide availability of these substances in the developing countries; besides the cholinergic crisis, this poisoning can cause neuromuscular compromise after acute exposition. Among them, there is paralysis type two or intermediate syndrome, a rare disorder that can increase morbidity and mortality if it appears, due to the compromise of the rib cage muscles, leading to a respiratory paralysis.This article presents a 16 years old female, who was refered to the "Clinica Universitaria Bolivariana" (CUB) after an organophosphorus poisoning and was admitted to the emergency room with an acute cholinergic syndrome. After antidotal treatment with atropine, she developed the intermediate syndrome as an acute complication that was managed with mechanical ventilation during the ventilatory compromise. During the recovery phase, it is evident that the neuromuscular compromise involves the four limbs, but it begun to recover gradually without any pharmacological intervention, a phenomenon that is characteristic of such liabilities

Parálisis diafragmática secundaria a bloqueo de plexo braquial vía infraclavicular para cirugía de miembro superior / Diaphragmatic paresis secondary to infraclavicular brachial plexus block for upper limb surgery

En las últimas décadas, ha sido exponencial el incremento del uso de la anestesia regional, y es cada vez mayor el número de pacientes que se benefician de bloqueos de nervio periférico, ya sea anestésicos o analgésicos. El uso de la anestesia regional ha demostrado ser una herramienta útil en el manejo analgésico post operatorio. La vía infraclavicular para bloqueo de plexo braquial es frecuentemente utilizada en la cirugía de miembro superior.

Introduction. Regional anesthesia techniques have grown exponentially in the last decades, and there is a growing number of patients who can benefit from anesthetic or analgesic peripheral nerve blocks. The use of Regional Anesthesia has shown to be a helpful tool for postoperative analgesic management. The infraclavicular approach to the brachial plexus block is widely used in upper extremity surgery.

Noninvasive determination of inspiratory pressure in patients with spinal cord injury: what is the best method? / Determinação não-invasiva da pressão inspiratória em pacientes com lesão medular traumática: qual é o melhor método?

The aim of the study was to evaluate the performance of sniff nasal inspiratory pressure (SNIP) and MIP in individuals with spinal cord injury. We evaluated 26 patients with spinal cord injury. Mean FVC in those with tetraplegia was 52 ± 19 percent of predicted, compared with 78 ± 23 percent of predicted in those with paraplegia (p < 0.05). In contrast, the percentage of predicted SNIP was lower in those with tetraplegia than in those with paraplegia (p < 0.05). In all participants, SNIP correlated significantly with the level of the injury (r = 0.489; 95 percent CI: 0.125-0.737). The impact that the greater discriminatory power of SNIP has on the diagnosis of impaired pulmonary function in spinal cord-injured patients should be investigated further.

O objetivo deste estudo foi verificar o desempenho da pressão inspiratória nasal durante o fungar (PInas) e da PImáx em indivíduos com lesão medular traumática. Foram avaliados 26 pacientes com lesão medular traumática. Os pacientes tetraplégicos e paraplégicos exibiram diferentes médias do percentual do previsto da CVF, respectivamente, 52 ± 19 por cento e 78 ± 23 por cento (p < 0,05). Ao contrário da PImáx, o percentual do previsto médio da PInas foi inferior nos tetraplégicos (p < 0,05) e, em todos os participantes, a correlação com o nível da lesão foi significativa (r = 0,489; IC95 por cento: 0,125-0,737). O impacto do melhor discernimento da PInas no diagnóstico das alterações da função inspiratória de pacientes com lesão medular traumática merece ser aprofundado.

A Case of Acute Respiratory Muscle Weakness Complicated by Sjogren Syndrome

Sjogren syndrome is a chronic autoimmune disease characterized by lymphocytic infiltration of exocrine glands resulting in dry mouth and eyes. Approximately one-third of patients present with systemic manifestations, but respiratory muscle involvements have been rarely reported. We report a case of acute respiratory failure complicated by primary Sjogren syndrome. Muscle biopsy revealed perivascular lymphocytic infiltrations. Corticosteroid therapy improved respiratory muscle weakness. Sjogren syndrome should be considered as one of the underlying diseases causing acute respiratory failure.