Papel del pediatra de urgencias durante la pandemia por SARS-CoV-2 / Role of the pediatric emergency department during SARS-CoV-2 pandemic

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[Covid-19 pandemic impact in pediatricians: stress factors and their consequences]. / El impacto de la epidemia Covid-19 en los pediatras: factores estresantes y sus consecuencias.

Previous studies have demonstrated that the COVID-19 pandemic has had negative psychological consequences on healthcare professionals, however, specific data on pediatricians are scarce. Ob jective: To evaluate anxiety among pediatricians after the first COVID-19 wave as well as to identify possible related risk factors. MATERIAL AND METHOD: A cross-sectional multicentric survey study was designed and sent to Spanish pediatricians through the Asociación Española de Pediatría's e-mail lists. Demographic, socio-familial, occupational, emotional self-perception, psychosomatic symptoms, smoking, alcohol, and psychotropic drugs use data were collected. The State-Trait Anxiety Scale (STAI) was included, and its association with qualitative and quantitative variables of the sample was studied. RESULTS: 440 surveys were registered. 42.2% of the participants expressed moderate-intense anxiety symptomatology according to the Anxiety-State scale and 26.9% on the Anxiety-Trait scale. Isolation at home was associated with a higher score on both scales. A change in the work situation of the cohabitant resulted in a higher score on the Anxiety-State scale. 41.1% of the respondents clas sified the psychological impact suffered as mild, 50% as moderate, and 8.9% as severe. Up to 71.8% of the participants manifested some psychosomatic symptoms, with a linear association between the concurrence of symptoms and higher scores on the two scales. CONCLUSIONS: After the first pandemic wave, pediatricians have suffered anxiety, causing physical and emotional discomfort. Personal sit uations were the main source of concern. Likewise, the presence of several somatic symptoms was associated with higher levels of anxiety.

Papel del pediatra de urgencias durante la pandemia por SARS-CoV-2 / Role of the emergency department pediatrician during SARS-CoV-2 pandemic

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Thoracic Aortic Intima-Media Thickness in Preschool Children Born Small for Gestational Age.

OBJECTIVE: To assess thoracic aortic intima-media thickness (aIMT) as a marker of thoracic aortic remodeling in children born small for gestational age (SGA). STUDY DESIGN: We assessed thoracic aIMT, carotid intima-media thickness (cIMT), and pulse wave velocity (PWV) in 239 patients (117 SGA; 122 appropriate for gestational age controls) age 6-8 years. Each SGA participant was matched 1:1 based on sex, gestational age, and birth date. Thoracic aIMT was determined by 2-dimensional transthoracic echocardiography. RESULTS: SGA children showed a significant increase in both aIMT (0.89 mm [0.12] vs 0.79 mm [0.11], P < .001) and cIMT (.50 mm [0.05] vs 0.49 mm [0.04], P < .001) compared with appropriate for gestational age controls, but the magnitude of the difference in aIMT was greater than that in cIMT (standardized difference of the means: +84% vs +27%). aIMT was linearly correlated with aortic arch PWV as measured by echocardiography (r = 0.211, P < .001) but not with carotid-femoral PWV (r = 0.113, P = .111). Born SGA was independently associated with increased aIMT after controlling for perinatal, anthropometric, and biochemical determinants in linear regression models. CONCLUSIONS: SGA children exhibit increased thoracic aIMT and aortic arch PWV in early childhood that may suggest the presence of structural changes in the thoracic aorta wall architecture. Measurement of ascending aIMT by transthoracic echocardiography is feasible and reproducible and may be a useful marker of vascular disease.

Comparison of ultrasound guided brachiocephalic and internal jugular vein cannulation in critically ill children.

PURPOSE: To determine whether ultrasound (US)-guided longitudinal in-plane supraclavicular cannulation of the brachiocephalic vein (BCV) improves cannulation success rates compared to transverse out-of-plane internal jugular vein (IJV) cannulation in urgent insertion of temporary central venous catheters (CVC) in critically ill children. MATERIALS AND METHODS: Prospective open pilot (non-randomized) comparative study carried out in a pediatric intensive care unit (PICU) of a university-affiliated hospital. Newborns and children aged 0 to 14 years admitted to the PICU in whom an urgent CVC was clinically indicated and was inserted in the IJV or BCV by US guidance were eligible. First-attempt success rate, overall success rate, number of puncture attempts, and cannulation time were compared between IJV and BCV techniques. RESULTS: Forty-six procedures (24 IJV and 22 BCV) in 38 patients were included. Full-sample median (range) age and weight were 13 (0.6-160) months and 9.5 (0.94-50) kg. No significant differences between IJV and BCV groups were observed for sex, age, weight, admission diagnosis, intra-procedural mechanical ventilation and sedation protocol. First attempt success rate was higher in the BCV than the IJV group (73 vs 37.5%, P= .017). Overall success rate was slightly higher in the BCV group (95 vs 83%, P = nonsignificant). Median (range) number of cannulation attempts [1 (1-3) vs 2 (1-4)] and cannulation time [66 (25-300) vs 170 (40-500) seconds] were significantly lower in the BCV group (P< .05). Patient's weight was inversely related to the number of cannulation attempts (Pearson coefficient -0.537, P= .007) and cannulation time (Pearson coefficient -0.495, P= .014) in the IJV but not in the BCV group. No major complications were observed. CONCLUSIONS: Ultrasound-guided supraclavicular in-plane BCV cannulation improved first attempt CVC cannulation success rates and reduced puncture attempts and cannulation time compared to US-guided out-of-plane IJV in critically ill children. A large randomized clinical trial is warranted to confirm our results.

Asociación entre enfermedad de Crohn y colangitis esclerosante primaria en una niña de 10 años / Association between Crohn's disease and primary sclerosing cholangitis in a 10 year old girl

Niña de 10 años con diarrea, abdominalgia, pérdida de peso y febrícula de un mes y medio de evolución. Los hallazgos analíticos y ecográficos hicieron sospechar una enfermedad inflamatoria intestinal. La endoscopía y la histología mostraron hallazgos compatibles con la enfermedad de Crohn. Se inició un tratamiento con mesalazina y nutrición enteral exclusiva, y se anadieron corticoides, inmunosupresores y ácido ursodesoxicólico por la persistencia de colestasis e hipergammaglobulinemia. La colangiorresonancia y la biopsia hepática confirmaron el diagnóstico de colangitis esclerosante primaria concomitante. La asociación entre la enfermedad de Crohn y la colangitis esclerosante primaria es muy poco frecuente; predomina en varones de entre los 20 y los 40 años de edad; y presenta una gran variabilidad clínica. El diagnóstico de confirmación requiere la realización de una colangiorresonancia o colangiopancreatografía retrógrada endoscópica. El pronóstico es malo y no existe ningún tratamiento capaz de frenar la progresión de la enfermedad.

A 10 year old girl with diarrhea, abdominal pain, weight loss and fever of one month and a half of evolution. Analytical and sonographic findings raised the possibility of inflammatory bowel disease. Endoscopy and histology showed findings consistent with Crohn's disease. Treatment was initiated with mesalazine and exclusive enteral nutrition. Later corticosteroid treatment, immunosuppressive drugs and ursodeoxycholic acid were added due to cholestasis and persistent hypergammaglobulinemia. Magnetic resonance cholangiography and liver biopsy confirmed the diagnosis of concomitant primary sclerosing cholangitis. The association between Crohn's disease and primary sclerosing cholangitis is rare, predominantly in males between 20 and 40 years old and it presents a great clinical variability. The confirmation of the diagnosis requires magnetic resonance cholangiography or endoscopic retrograde cholangiopancreatography. The prognosis is poor and there is no treatment to slow the progression of the disease.

Canalización del tronco braquiocefálico guiada por ecografía en neonatos y lactantes / Ultrasound-guided cannulation of the brachiocephalic vein in neonates and infants

INTRODUCCIÓN: La inserción de catéteres venosos centrales (CVC) en neonatos y lactantes pequeños es una técnica difícil y de riesgo. La canalización guiada por ecografía (ECO) aumenta la tasa de éxito y reduce las complicaciones. El acceso más habitual es el de yugular interna; sin embargo, en neonatos y lactante pequeños es técnicamente más difícil que a otras edades. Presentamos nuestra experiencia preliminar con una nueva técnica de canalización venosa central aplicable a neonatos y lactantes pequeños: el acceso supraclavicular del tronco braquiocefálico (TBC) guiado por ECO. MÉTODOS: Serie de casos de neonatos y lactantes de peso inferior a 5kg en los que se ha intentado la canalización guiada por ECO del TBC mediante abordaje supraclavicular. Se utilizó un abordaje longitudinal en plano del TBC desde la fosa supraclavicular con un transductor lineal de 12Hz o microcónvex de 8Hz. Todas las canalizaciones fueron realizadas por el mismo operador, un pediatra con experiencia previa en la canalización guiada por ECO. RESULTADOS: Se incluyó a 6 pacientes con una mediana (rango) de peso de 2,1 (0,94-4,1) kg y edad de 1,9 (0,6-4) meses. En 2 casos se requirieron 2 intentos, canalizándose el TBC en un intento en los 4 restantes. No se observaron complicaciones relacionadas con el procedimiento ni con la permanencia del catéter, siendo los CVC retirados al cabo de 9 (6-15) días. CONCLUSIÓN: El acceso supraclavicular al TBC guiado por ecografía es una alternativa factible y segura en neonatos y lactantes muy pequeños. Son necesarios más estudios antes su utilización rutinaria en la práctica clínica

INTRODUCTION: Central venous catheter (CVC) insertion in neonates and small infants is a challenging and high risk procedure. Ultrasound (US) guided cannulation increases the success rate and reduces procedural-related complications. The internal jugular vein is the most frequent site for US-guided CVC insertion. However this approach is technically demanding in neonates and small infants. US-guided supraclavicular cannulation of the brachiocephalic vein (BCV) is a new approach that may be advantageous in case of difficult central venous catheterization. We present our preliminary experience with this technique in a case series of neonates and small infants. METHODS: Case series of neonates and small infants weighing less than 5kg, in whom US-guided supraclavicular cannulation of the BCV was attempted. A longitudinal 'in plane' supraclavicular approach to the BCV was performed using a 12Hz linear or a 8Hz microconvex transducer. All cannulations were performed by the same operator, a pediatrician with previous experience in US-guided central venous catheterization. RESULTS: the study included 6 patients with a median (range) weight of 2.1 (0.94-4.1) kg and age of 1.9 (0.6-4) months. Two cases required 2 punctures, while cannulation was achieved at the first attempt in the remaining 4 cases. There were no procedural or catheter-related complications. CVCs were withdrawn after 9 (6-15) days. CONCLUSIONS: The US-guided supraclavicular approach to the BCV is a feasible and safe alternative in neonates and very small infants. More studies are needed to define the role of this new venous access before its routine application in daily practice

[Association between Crohn's disease and primary sclerosing cholangitis in a 10 year old girl]. / Asociación entre enfermedad de Crohn y colangitis esclerosante primaria en una niña de 10 años.

A 10 year old girl with diarrhea, abdominal pain, weight loss and fever of one month and a half of evolution. Analytical and sonographic findings raised the possibility of inflammatory bowel disease. Endoscopy and histology showed findings consistent with Crohn's disease. Treatment was initiated with mesalazine and exclusive enteral nutrition. Later corticosteroid treatment, immunosuppressive drugs and ursodeoxycholic acid were added due to cholestasis and persistent hypergammaglobulinemia. Magnetic resonance cholangiography and liver biopsy confirmed the diagnosis of concomitant primary sclerosing cholangitis. The association between Crohn's disease and primary sclerosing cholangitis is rare, predominantly in males between 20 and 40 years old and it presents a great clinical variability. The confirmation of the diagnosis requires magnetic resonance cholangiography or endoscopic retrograde cholangiopancreatography. The prognosis is poor and there is no treatment to slow the progression of the disease.

Niña de 10 años con diarrea, abdominalgia, pérdida de peso y febrícula de un mes y medio de evolución. Los hallazgos analíticos y ecográficos hicieron sospechar una enfermedad inflamatoria intestinal. La endoscopía y la histología mostraron hallazgos compatibles con la enfermedad de Crohn. Se inició un tratamiento con mesalazina y nutrición enteral exclusiva, y se anadieron corticoides, inmunosupresores y ácido ursodesoxicólico por la persistencia de colestasis e hipergammaglobulinemia. La colangiorresonancia y la biopsia hepática confirmaron el diagnóstico de colangitis esclerosante primaria concomitante. La asociación entre la enfermedad de Crohn y la colangitis esclerosante primaria es muy poco frecuente; predomina en varones de entre los 20 y los 40 años de edad; y presenta una gran variabilidad clínica. El diagnóstico de confirmación requiere la realización de una colangiorresonancia o colangiopancreatografía retrógrada endoscópica. El pronóstico es malo y no existe ningún tratamiento capaz de frenar la progresión de la enfermedad.

[Ultrasound-guided cannulation of the brachiocephalic vein in neonates and infants]. / Canalización del tronco braquiocefálico guiada por ecografía en neonatos y lactantes.

INTRODUCTION: Central venous catheter (CVC) insertion in neonates and small infants is a challenging and high risk procedure. Ultrasound (US) guided cannulation increases the success rate and reduces procedural-related complications. The internal jugular vein is the most frequent site for US-guided CVC insertion. However this approach is technically demanding in neonates and small infants. US-guided supraclavicular cannulation of the brachiocephalic vein (BCV) is a new approach that may be advantageous in case of difficult central venous catheterization. We present our preliminary experience with this technique in a case series of neonates and small infants. METHODS: Case series of neonates and small infants weighing less than 5kg, in whom US-guided supraclavicular cannulation of the BCV was attempted. A longitudinal "in plane" supraclavicular approach to the BCV was performed using a 12Hz linear or a 8Hz microconvex transducer. All cannulations were performed by the same operator, a pediatrician with previous experience in US-guided central venous catheterization. RESULTS: The study included 6 patients with a median (range) weight of 2.1 (0.94-4.1) kg and age of 1.9 (0.6-4) months. Two cases required 2 punctures, while cannulation was achieved at the first attempt in the remaining 4 cases. There were no procedural or catheter-related complications. CVCs were withdrawn after 9 (6-15) days. CONCLUSIONS: The US-guided supraclavicular approach to the BCV is a feasible and safe alternative in neonates and very small infants. More studies are needed to define the role of this new venous access before its routine application in daily practice.

[Necrotizing pancreatitis in a 11 year-old boy. Case report]. / Pancreatitis necrohemorrágica en un niño de 11 años. Caso clínico.

Acute pancreatitis is an emerging problem with an incidence between 3.6 and 13.2 cases/100,000 children. However, necrotizing pancreatitis (necrosis greater than 30% of the pancreas and/or greater than 3 cm in an area of the pancreas) is a rare condition (<1% of acute pancreatitis), with a presentation similar to not complicated pancreatitis cases and with high morbidity and mortality. Computed tomography allows an assessment of the severity of the disease and the risk of complications (Balthazar Score). Not complicated pancreatitis cases have a favorable outcome, but necrotizing pancreatitis cases require intensive medical treatment and sometimes surgical treatment. We report the case of an 11 year-old boy with clinical presentation compatible with acute pancreatitis and confirmed by abdominal ultrasonography. Due to worsening of laboratory test, an abdominal computed tomography was performed showing a necrotizing pancreatitis and large pseudocysts. Close monitoring and a conservative approach was adopted, with clinical and analytical improvement. After one year follow-up, the patient is asymptomatic, normal ancillary tests and no evidence of pancreatic pseudocyst. The pediatric necrohaemorragic pancreatitis is an uncommon and potentially severe entity; we must keep this complication in mind for an adequate differential diagnosis of acute abdomen.

Pancreatitis necrohemorrágica en un niño de 11 años: Caso clínico / Necrotizing pancreatitis in a 11 year-old boy: Case report

La pancreatitis aguda es un problema emergente, con una incidencia de 3,6-13,2 casos/100000 niños. Sin embargo, la pancreatitis necrotizante (necrosis mayor del 30% del páncreas y/o mayor de 3 cm de un área del páncreas) es un proceso poco frecuente (< 1% de las pancreatitis agudas), con presentación similar a los casos de pancreatitis no complicada y con una elevada morbimortalidad. La tomografía axial computada permite valorar, en estos casos, la gravedad del cuadro y el riesgo de complicaciones (puntaje de Balthazar). Las pancreatitis no complicadas tienen una evolución favorable, pero los casos de pancreatitis necrotizante precisan tratamiento médico intensivo y, en ocasiones, cirugía. Presentamos el caso de un varón de 11 años con clínica compatible con una pancreatitis aguda confirmada mediante ecografía abdominal. Ante el empeoramiento analítico, se realizó una tomografía axial computada, que mostró una pancreatitis necrotizante y pseudoquistes de gran tamaño. Se decidió la monitorización estrecha y la adopción de una actitud conservadora, con mejoría clínico-analítica. Después de un año de seguimiento, el paciente permanece asintomático y han desaparecido los pseudoquistes. La pancreatitis necrohemorrágica es una entidad infrecuente en la edad pediátrica pero potencialmente grave que debemos tener presente en el diagnóstico diferencial de un abdomen agudo.

Acute pancreatitis is an emerging problem with an incidence between 3.6 and 13.2 cases/100,000 children. However, necrotizing pancreatitis (necrosis greater than 30% of the pancreas and/or greater than 3 cm in an area of the pancreas) is a rare condition (< 1% of acute pancreatitis), with a presentation similar to not complicated pancreatitis cases and with high morbidity and mortality. Computed tomography allows an assessment of the severity of the disease and the risk of complications (Balthazar Score). Not complicated pancreatitis cases have a favorable outcome, but necrotizing pancreatitis cases require intensive medical treatment and sometimes surgical treatment. We report the case of an 11 year-old boy with clinical presentation compatible with acute pancreatitis and confirmed by abdominal ultrasonography. Due to worsening of laboratory test, an abdominal computed tomography was performed showing a necrotizing pancreatitis and large pseudocysts. Close monitoring and a conservative approach was adopted, with clinical and analytical improvement. After one year follow-up, the patient is asymptomatic, normal ancillary tests and no evidence of pancreatic pseudocyst. The pediatric necrohaemorragic pancreatitis is an uncommon and potentially severe entity; we must keep this complication in mind for an adequate differential diagnosis of acute abdomen.

Pancreatitis necrohemorrágica en un niño de 11 años: Caso clínico / Necrotizing pancreatitis in a 11 year-old boy: Case report

La pancreatitis aguda es un problema emergente, con una incidencia de 3,6-13,2 casos/100000 niños. Sin embargo, la pancreatitis necrotizante (necrosis mayor del 30% del páncreas y/o mayor de 3 cm de un área del páncreas) es un proceso poco frecuente (< 1% de las pancreatitis agudas), con presentación similar a los casos de pancreatitis no complicada y con una elevada morbimortalidad. La tomografía axial computada permite valorar, en estos casos, la gravedad del cuadro y el riesgo de complicaciones (puntaje de Balthazar). Las pancreatitis no complicadas tienen una evolución favorable, pero los casos de pancreatitis necrotizante precisan tratamiento médico intensivo y, en ocasiones, cirugía. Presentamos el caso de un varón de 11 años con clínica compatible con una pancreatitis aguda confirmada mediante ecografía abdominal. Ante el empeoramiento analítico, se realizó una tomografía axial computada, que mostró una pancreatitis necrotizante y pseudoquistes de gran tamaño. Se decidió la monitorización estrecha y la adopción de una actitud conservadora, con mejoría clínico-analítica. Después de un año de seguimiento, el paciente permanece asintomático y han desaparecido los pseudoquistes. La pancreatitis necrohemorrágica es una entidad infrecuente en la edad pediátrica pero potencialmente grave que debemos tener presente en el diagnóstico diferencial de un abdomen agudo.(AU)

Acute pancreatitis is an emerging problem with an incidence between 3.6 and 13.2 cases/100,000 children. However, necrotizing pancreatitis (necrosis greater than 30% of the pancreas and/or greater than 3 cm in an area of the pancreas) is a rare condition (< 1% of acute pancreatitis), with a presentation similar to not complicated pancreatitis cases and with high morbidity and mortality. Computed tomography allows an assessment of the severity of the disease and the risk of complications (Balthazar Score). Not complicated pancreatitis cases have a favorable outcome, but necrotizing pancreatitis cases require intensive medical treatment and sometimes surgical treatment. We report the case of an 11 year-old boy with clinical presentation compatible with acute pancreatitis and confirmed by abdominal ultrasonography. Due to worsening of laboratory test, an abdominal computed tomography was performed showing a necrotizing pancreatitis and large pseudocysts. Close monitoring and a conservative approach was adopted, with clinical and analytical improvement. After one year follow-up, the patient is asymptomatic, normal ancillary tests and no evidence of pancreatic pseudocyst. The pediatric necrohaemorragic pancreatitis is an uncommon and potentially severe entity; we must keep this complication in mind for an adequate differential diagnosis of acute abdomen.(AU)

Pancreatitis necrohemorrágica en un niño de 11 años: Caso clínico / Necrotizing pancreatitis in a 11 year-old boy: Case report

La pancreatitis aguda es un problema emergente, con una incidencia de 3,6-13,2 casos/100000 niños. Sin embargo, la pancreatitis necrotizante (necrosis mayor del 30% del páncreas y/o mayor de 3 cm de un área del páncreas) es un proceso poco frecuente (< 1% de las pancreatitis agudas), con presentación similar a los casos de pancreatitis no complicada y con una elevada morbimortalidad. La tomografía axial computada permite valorar, en estos casos, la gravedad del cuadro y el riesgo de complicaciones (puntaje de Balthazar). Las pancreatitis no complicadas tienen una evolución favorable, pero los casos de pancreatitis necrotizante precisan tratamiento médico intensivo y, en ocasiones, cirugía. Presentamos el caso de un varón de 11 años con clínica compatible con una pancreatitis aguda confirmada mediante ecografía abdominal. Ante el empeoramiento analítico, se realizó una tomografía axial computada, que mostró una pancreatitis necrotizante y pseudoquistes de gran tamaño. Se decidió la monitorización estrecha y la adopción de una actitud conservadora, con mejoría clínico-analítica. Después de un año de seguimiento, el paciente permanece asintomático y han desaparecido los pseudoquistes. La pancreatitis necrohemorrágica es una entidad infrecuente en la edad pediátrica pero potencialmente grave que debemos tener presente en el diagnóstico diferencial de un abdomen agudo.(AU)

Acute pancreatitis is an emerging problem with an incidence between 3.6 and 13.2 cases/100,000 children. However, necrotizing pancreatitis (necrosis greater than 30% of the pancreas and/or greater than 3 cm in an area of the pancreas) is a rare condition (< 1% of acute pancreatitis), with a presentation similar to not complicated pancreatitis cases and with high morbidity and mortality. Computed tomography allows an assessment of the severity of the disease and the risk of complications (Balthazar Score). Not complicated pancreatitis cases have a favorable outcome, but necrotizing pancreatitis cases require intensive medical treatment and sometimes surgical treatment. We report the case of an 11 year-old boy with clinical presentation compatible with acute pancreatitis and confirmed by abdominal ultrasonography. Due to worsening of laboratory test, an abdominal computed tomography was performed showing a necrotizing pancreatitis and large pseudocysts. Close monitoring and a conservative approach was adopted, with clinical and analytical improvement. After one year follow-up, the patient is asymptomatic, normal ancillary tests and no evidence of pancreatic pseudocyst. The pediatric necrohaemorragic pancreatitis is an uncommon and potentially severe entity; we must keep this complication in mind for an adequate differential diagnosis of acute abdomen.(AU)

Pancreatitis necrohemorrágica en un niño de 11 años. Caso clínico. / [Necrotizing pancreatitis in a 11 year-old boy. Case report].

Acute pancreatitis is an emerging problem with an incidence between 3.6 and 13.2 cases/100,000 children. However, necrotizing pancreatitis (necrosis greater than 30

of the pancreas and/or greater than 3 cm in an area of the pancreas) is a rare condition (<1

of acute pancreatitis), with a presentation similar to not complicated pancreatitis cases and with high morbidity and mortality. Computed tomography allows an assessment of the severity of the disease and the risk of complications (Balthazar Score). Not complicated pancreatitis cases have a favorable outcome, but necrotizing pancreatitis cases require intensive medical treatment and sometimes surgical treatment. We report the case of an 11 year-old boy with clinical presentation compatible with acute pancreatitis and confirmed by abdominal ultrasonography. Due to worsening of laboratory test, an abdominal computed tomography was performed showing a necrotizing pancreatitis and large pseudocysts. Close monitoring and a conservative approach was adopted, with clinical and analytical improvement. After one year follow-up, the patient is asymptomatic, normal ancillary tests and no evidence of pancreatic pseudocyst. The pediatric necrohaemorragic pancreatitis is an uncommon and potentially severe entity; we must keep this complication in mind for an adequate differential diagnosis of acute abdomen.