Transcultural adaptation and validation of IMPACT-III and IMPACT-III-P in Spanish families: a multicenter study from SEGHNP.

IMPACT-III and IMPACT-III-P are health-related quality of life (HRQoL) questionnaires for patients with pediatric inflammatory bowel disease (p-IBD) and their parents/caregivers. We aimed to perform a transcultural adaptation and validation for the Spanish context. Translation, back-translation, and evaluation of the questionnaires were performed by an expert committee and 12 p-IBD families. We recruited p-IBD patients aged 10-17 and their parents/caregivers. Utility, content, and face validity were considered. Validation was performed with Cronbach's alpha coefficient and varimax rotation. We confirmed the adequacy of the factor analysis using Kaiser-Meyer-Olkin (KMO) and Bartlett's sphericity tests. A confirmatory factor analysis was performed using the following goodness indexes: chi-square, Normed Fit Index (NFI), Root Mean Square Error of Approximation index (RMSEA), Standardized Root Mean Square Residual (SRMR), and Comparative Fit Index (CFI). The correlation coefficient between IMPACT-III and IMPACT-III-P was analyzed. We included 370 patients and 356 parents/caregivers (37 hospitals). Both questionnaires had good content and face validity and were considered user-friendly. The KMO measure (0.8998 and 0.9228, respectively) and Bartlett's sphericity test (p-value < 0.001 for both) confirmed the adequacy of the factor analysis. The 4-factor model, complying with Kaiser's criterion, explained 89.19% and 88.87% of the variance. Cronbach's alpha (0.9123 and 0.9383) indicated excellent internal consistency. The CFA showed an adequate fit (NFI 0.941 and 0.918, RMSEA 0.048 and 0.053, SRMR 0.037 and 0.044, and CFI 0.879 and 0.913). The correlation coefficient was excellent (0.92). CONCLUSION: The SEGHNP versions of IMPACT-III and IMPACT-III-P are valid and reliable instruments for Spanish p-IBD families. WHAT IS KNOWN: • IMPACT-III and parent-proxy IMPACT-III (IMPACT-III-P) are useful questionnaires for assessing health-related quality of life (HRQoL) in pediatric inflammatory bowel disease (p-IBD) patients and their parents/caregivers and have been translated and validated in several countries. • To date, no transcultural adaptation and validation of these questionnaires have been published for Spanish patients with p-IBD and their families. WHAT IS NEW: • This is the first transcultural adaptation and validation of IMPACT-III and IMPACT-III-P for Spanish p-IBD families. • These are valid and reliable instruments for assessing HRQoL in Spanish families of patients with p-IBD.

The Effect of Polymorphisms and Other Biomarkers on Infliximab Exposure in Paediatric Inflammatory Bowel Disease: Development of a Population Pharmacokinetic Model.

BACKGROUND: Therapeutic drug monitoring (TDM) of infliximab has been shown to be a effective strategy for inflammatory bowel disease (IBD). Population pharmacokinetic (PopPK) modeling can predict trough concentrations for individualized dosing. OBJECTIVE: The aim of this study was to develop a PopPK model of infliximab in a paediatric population with IBD, assessing the effect of single nucleotide polymorphisms (SNPs) and other biomarkers on infliximab clearance. METHODS: This observational and ambispective single-centre study was conducted in paediatric patients with IBD treated with infliximab between July 2016 and July 2022 in the Paediatric Gastroenterology Service of the Hospital Universitari Vall d'Hebron (HUVH) (Spain). Demographic, clinical, and analytical variables were collected. Twenty SNPs potentially associated with variations in the response to infliximab plasma concentrations were analysed. infliximab serum concentrations and antibodies to infliximab (ATI) were determined by ELISA. PopPK modelling was performed using nonlinear mixed-effects analysis (NONMEM). RESULTS: Thirty patients (21 males) were included. The median age (range) at the start of infliximab treatment was 13 years (16 months to 16 years). A total of 190 samples were obtained for model development (49 [25.8%] during the induction phase). The pharmacokinetics (PK) of infliximab were described using a two-compartment model. Weight, erythrocyte sedimentation rate (ESR), faecal calprotectin (FC), and the SNP rs1048610 (ADAM17) showed statistical significance for clearance (CL), and albumin for inter-compartmental clearance (Q). Estimates of CL1 (genotype 1-AA), CL2 (genotype 2-AG), CL3 (genotype 3-GG), Q, Vc, and Vp (central and peripheral distribution volumes) were 0.0066 L/h/46.4 kg, 0.0055 L/h/46.4 kg, 0.0081 L/h/46.4 kg, 0.0029 L/h/46.4 kg, 0.6750 L/46.4 kg, and 1.19 L/46.4 kg, respectively. The interindividual variability (IIV) estimates for clearance, Vc, and Vp were 19.33, 16.42, and 36.02%, respectively. CONCLUSIONS: A popPK model utilising weight, albumin, FC, ESR, and the SNP rs1048610 accurately predicted infliximab trough concentrations in children with IBD.

A Better Understanding of Pediatric Autoimmune Pancreatitis: Over 13 Years of Experience.

OBJECTIVES: Pediatric autoimmune pancreatitis (P-AIP) is an uncommon disease whose diagnosis requires strong clinical suspicion. Late diagnosis increases morbidity. We aimed to compare the usefulness of the 2011 International Consensus Diagnostic Criteria (ICDC) for Autoimmune Pancreatitis with the 2018 INSPPIRE (INternational Study Group of Pediatric Pancreatitis: In search for a cuRE) criteria. METHODS: We retrospectively analyzed demographics and clinical, laboratory, radiological, and histological findings at diagnosis and during long-term follow-up in children diagnosed with AIP in 2 tertiary hospitals between 2008 and 2021. RESULTS: We included 11 patients [6 girls; median age at diagnosis, 12.5 (range 2.8-15.7) years]. The most common symptom was abdominal pain. Pancreatic enzymes were elevated in 10 patients, and serum immunoglobulin G4 was elevated in 1. Magnetic resonance imaging showed enlargement of the pancreatic head in 10 patients and general pancreatic enlargement in 1. Pancreatic and papilla tissue were obtained from 9 patients. All patients received corticosteroids (prednisolone), and 4 also received azathioprine. According to the ICDC, all patients were classified as probable or non-otherwise specified AIP. According to INSPPIRE criteria, all patients were classified as AIP. Using the INSPPIRE criteria would have avoided biopsies in 6 patients who responded well to corticosteroids. CONCLUSIONS: The INSPPIRE criteria are useful. Using the ICDC in pediatric patients can delay diagnosis and result in unnecessary invasive tests.

Safety and effectiveness of vedolizumab in paediatric patients with inflammatory bowel disease: an observational multicentre Spanish study.

Vedolizumab is a humanised monoclonal antibody that binds to integrin α4ß7 expressed in T-cells, inhibiting its binding to the mucosal addressin cell adhesion molecule-1 (MAdCAM-1), which is specifically expressed in the small intestine and colon, playing a fundamental role in T-cell migration to the gastrointestinal tract. Vedolizumab has been shown to be effective in treating adults with inflammatory bowel disease; however, efficacy data for paediatric use are scarce. The objective of the present study was to assess the effectiveness and safety of vedolizumab for inducing and maintaining clinical remission in children with inflammatory bowel disease. We conducted a retrospective multicentre study of patients younger than 18 years with inflammatory bowel disease refractory to anti-tumour necrosis factor alpha (anti-TNF-α) drugs, who underwent treatment with vedolizumab. Clinical remission was defined as a score < 10 points in the activity indices. We included 42 patients, 22 of whom were male (52.3%), with a median age of 13.1 years (IQR 10.2-14.2) at the start of treatment. Of the 42 patients, 14 (33.3%) had Crohn's disease (CD) and 28 (66.7%) had ulcerative colitis (UC). At the start of treatment with vedolizumab, the Paediatric Crohn's Disease Activity Index was 36 (IQR 24-40) and the Paediatric Ulcerative Colitis Activity Index was 47 (IQR 25-65). All of them had received prior treatment with anti-TNF and 3 patients ustekinumab. At week 14, 69% of the patients responded to the treatment (57.1% of those with CD and 75% of those with UC; p=0.238), and 52.4% achieved remission (35.7% with CD and 60.7% with UC; p=0.126). At 30 weeks, the response rate was 66.7% (46.2% and 78.3% for CD and UC, respectively; p=0.049), and 52.8% achieved remission (30.8% and 65.2% for CD and UC, respectively; p=0.047). Among the patients with remission at week 14, 80% of the patients with CD and 84.5% of those with UC maintained the remission at 52 weeks. Adverse effects were uncommon and mild. Three patients (7.1%) presented headaches, 1 presented alopecia, 1 presented anaemia and 1 presented dermatitis.Conclusion: The results show that treatment with vedolizumab is a safe and effective option for achieving clinical remission in paediatric patients with inflammatory bowel disease with primary failure or loss of response to other treatments, especially in UC. What is Known: • Vedolizumab is effective in inducing and maintaining remission in adult patients with inflammatory bowel disease. • Most studies and clinical trials have been performed on adult populations, and there is currently no indication for paediatric populations. What is New: • Children with inflammatory bowel disease refractory to anti-TNF presented higher clinical remission rates than those published for adults. • There are few publications of this magnitude on paediatric populations treated with vedolizumab and with long-term follow-up (52 weeks).

Spanish Pediatric Inflammatory Bowel Disease Diagnostic Delay Registry: SPIDER Study From Sociedad Española de Gastroenterología, Hepatología y Nutrición Pediátrica.

Background and Aims: Diagnostic delay (DD) is especially relevant in children with inflammatory bowel disease, leading to potential complications. We examined the intervals and factors for DD in the pediatric population of Spain. Methods: We conducted a multicentric prospective study, including 149 pediatric inflammatory bowel disease patients, obtaining clinical, anthropometric, and biochemical data. Time to diagnosis (TD) was divided into several intervals to identify those where the DD was longer and find the variables that prolonged those intervals. Missed opportunities for diagnosis (MODs) were also identified. Results: Overall TD was 4.4 months (interquartile range [IQR] 2.6-10.4), being significantly higher in Crohn's disease (CD) than in ulcerative colitis (UC) (6.3 [IQR 3.3-12.3] vs. 3 [IQR 1.6-5.6] months, p = 0.0001). Time from the visit to the first physician until referral to a pediatric gastroenterologist was the main contributor to TD (2.4 months [IQR 1.03-7.17] in CD vs. 0.83 months [IQR 0.30-2.50] in UC, p = 0.0001). One hundred and ten patients (78.3%) visited more than one physician (29.9% to 4 or more), and 16.3% visited the same physician more than six times before being assessed by the pediatric gastroenterologist. The number of MODs was significantly higher in CD than that in UC patients: 4 MODs (IQR 2-7) vs. 2 MODs ([IQR 1-5], p = 0.003). Referral by pediatricians from hospital care allowed earlier IBD diagnosis (odds ratio 3.2 [95% confidence interval 1.1-8.9], p = 0.025). Conclusions: TD and DD were significantly higher in CD than those in UC. IBD patients (especially those with CD) undergo a large number of medical visits until the final diagnosis.

Predictors of Response to Exclusive Enteral Nutrition in Newly Diagnosed Crohn´s Disease in Children: PRESENCE Study from SEGHNP.

Exclusive enteral nutrition (EEN) has been shown to be more effective than corticosteroids in achieving mucosal healing in children with Crohn´s disease (CD) without the adverse effects of these drugs. The aims of this study were to determine the efficacy of EEN in terms of inducing clinical remission in children newly diagnosed with CD, to describe the predictive factors of response to EEN and the need for treatment with biological agents during the first 12 months of the disease. We conducted an observational retrospective multicentre study that included paediatric patients newly diagnosed with CD between 2014-2016 who underwent EEN. Two hundred and twenty-two patients (140 males) from 35 paediatric centres were included, with a mean age at diagnosis of 11.6 ± 2.5 years. The median EEN duration was 8 weeks (IQR 6.6-8.5), and 184 of the patients (83%) achieved clinical remission (weighted paediatric Crohn's Disease activity index [wPCDAI] < 12.5). Faecal calprotectin (FC) levels (µg/g) decreased significantly after EEN (830 [IQR 500-1800] to 256 [IQR 120-585] p < 0.0001). Patients with wPCDAI ≤ 57.5, FC < 500 µg/g, CRP >15 mg/L and ileal involvement tended to respond better to EEN. EEN administered for 6-8 weeks is effective for inducing clinical remission. Due to the high response rate in our series, EEN should be used as the first-line therapy in luminal paediatric Crohn's disease regardless of the location of disease and disease activity.

Manejo de la alergia a proteína de leche de vaca por los gastroenterólogos españoles / Attitudes towards cow's milk protein allergy management by spanish gastroenterologist

INTRODUCCIÓN: La alergia alimentaria es un problema creciente, siendo la proteína de leche de vaca la principal causa en niños. Sin un proceso diagnóstico adecuado, existe un elevado riesgo de sobrediagnóstico e infradiagnóstico y, por lo tanto, de sobretratamiento e infratratamiento. El objetivo de nuestro estudio fue analizar la variabilidad en el manejo de la alergia a proteína de leche de vaca (APLV) por los gastroenterólogos pediátricos españoles. MÉTODOS: Se envió un cuestionario de 50 preguntas a través de la lista de email de la Sociedad Española de Gastroenterología, Hepatología y Nutrición Pediátricas. RESULTADOS: Recibimos 73 cuestionarios de los 321 enviados. Solo 3 de las respuestas lograron más del 90% de acuerdo. El 33% considera que la provocación oral es necesaria para el diagnóstico de APLV siempre. El 25% considera que la mejoría clínica tras la retirada de las proteínas de leche de vaca es suficiente para el diagnóstico. La provocación oral es realizada en domicilio por el 83,5% de los encuestados en APLV no IgE mediada. Los hidrolizados extensos de caseína son el tratamiento de elección (69,9%). Las fórmulas de soja, la última opción. Casi todos los encuestados conocían la existencia de guías de manejo de APLV, siendo las de la Sociedad Europea de Gastroenterología, Hepatología y Nutrición Pediátrica las más utilizadas (64,4%). El 23% considera que su conocimiento sobre alergia es inadecuado. CONCLUSIONES: Aunque la APLV es una patología prevalente que los gastroenterólogos pediátricos llevan décadas tratando, hemos encontrado una gran variabilidad en su manejo. Existe posibilidad de mejora en este campo en el futuro

INTRODUCTION: Food allergy is an increasing health problem in the developed world. Cow's milk protein is the main cause of food allergy in infants. Without an appropriate diagnostic workup, there is a high risk of both over- and underdiagnosis and therefore, over and undertreatment. The objective of our study was to analyze the variability in cow's milk protein allergy (CMPA) management by pediatric gastroenterologists in Spain. METHODS: A fifty item questionnaire, including open and closed items in a Likert's scale from 0 to 5, was drafted and distributed through the Spanish Society for Pediatric Gastroenterology, Hepatology and Nutrition (SEGHNP) e-mail list. RESULTS: Seventy-three questionnaires were received back out of 321. Only 3 of the items achieved concordance greater than 90%. Thirty-three percent considered oral challenge to be necessary for the diagnosis of CMPA under any circumstance. Twenty-five percent considered that symptom improvement after cow's milk removal was enough for the diagnosis. Oral challenge was performed at home by 83.5% in non-IgE mediated cases. Extensively hydrolyzed casein formulas were the treatment of choice for 69.9%. Soy formulas were the last option. Almost all respondents were aware of the existence of clinical guidelines on CMPA, being European Society of Pediatric Gastroenterology, Hepatology and Nutrition guidelines the most followed (64.4%). Twenty-three percent considered that their knowledge about allergy was inadequate. CONCLUSIONS: Although CMPA is a prevalent condition that pediatric gastroenterologists have been treating for decades, we found a huge variability on its management. There is potential for improvement in this field among pediatric gastroenterologist in the future

Chylomicron Retention Disease: a Description of a New Mutation in a Very Rare Disease.

Chylomicron retention disease, also known as Anderson's disease, is a rare hereditary hypocholesterolemic disorder, recessive inherited, characterized by nonspecific symptoms as abdominal distension, steatorrhea, and vomiting associated with failure to thrive. We describe a patient with failure to thrive, chronic diarrhea and steatorrhea who the diagnosis of chylomicron retention disease was established after several months of disease progression. The genetic study confirmed a homozygosity mutation in SAR1B gene, identifying a mutation never previous described [c.83_84delTG(p.Leu28Argfs*7)]. With this case report the authors aim to highlight for this very rare cause of failure to thrive and for the importance of an attempting diagnosis, in order to start adequate management with low fat diet supplemented with fat-soluble vitamins, reverting the state of malnutrition and avoiding possible irreversible and desvantating complications.

Síndrome de rumiación: dificultades diagnósticas y terapéuticas de un proceso no tan infrecuente / Rumination syndrome: Diagnostic and therapeutic difficulties of a not so uncommon disorder

Introducción: El Síndrome de rumiación es un trastorno gastrointestinal funcional poco común. De diagnóstico difícil, por el desconocimiento del mismo dentro del colectivo médico, acaba conllevando la realización de múltiples pruebas complementarias, la aplicación de diferentes tratamientos, y diagnósticos tardíos o erróneos, en la mayoría de los casos. Su tratamiento es difícil y complejo dada su naturaleza multifactorial. El objetivo de este estudio es presentar nuestra casuística analizando sus datos clínicos, diagnósticos y terapéuticos. Pacientes y método: Estudio descriptivo y retrospectivo de todos los casos diagnosticados entre enero del 2010 y mayo del 2016, controlados en las unidades de Gastroenterología Pediátrica del Consorci Sanitari de Terrassa y del Hospital Materno-Infantil Vall d'Hebron. Resultados: Se analizó a un total de 12 pacientes. Una media de edad al inicio de los síntomas de 9 anos y un mes, con un tiempo medio de evolución antes de llegar al diagnóstico de 2 años y 3 meses, y una media de pruebas complementarias realizadas hasta del diagnóstico de 8,1. En 10 de los 12 pacientes se había probado, antes del diagnóstico de rumiación, algún tipo de tratamiento que resultó ineficaz en todos los casos. Como novedad terapéutica, 10 de nuestros casos se sometieron a un tratamiento experimental de biofeedback. Conclusiones: Debido al conocimiento limitado de esta entidad, entre nuestros profesionales, en cuanto a su presentación clínica, diagnóstico y tratamiento, estos pacientes son frecuentemente mal diagnosticados y, a menudo, se ven sometidos a pruebas complementarias y tratamientos evitables, invasivos y costosos (AU)

Introduction: Rumination syndrome is an uncommon gastrointestinal functional disorder that may be difficult to diagnose, as not many physicians are aware of this condition. In many cases, patients undergo numerous tests and are prescribed several treatments based on erroneous diagnoses. When the correct diagnosis is eventually made, therapy for the syndrome can be difficult and complex because of its multifactorial nature. The aim of this study was to present our experience with this condition, by presenting an analysis of the clinical, diagnostic, and therapeutic data of our patients. Patients and method: A prospective and retrospective study was conducted on all cases of rumination syndrome diagnosed between January 2010 and May 2016 in patients attending the Paediatric Gastroenterology Departments of two hospitals: Consorci Sanitari de Terrassa and Hospital Materno-Infantil Vall d’Hebron (Barcelona, Spain). Results: The analysis included 12 patients, with a mean age at the onset of symptoms of 9 years and 1 month, and the mean time period to make the diagnosis was 2 years and 3 months. A mean of 8.1 complementary tests were carried out before establishing the diagnosis. In 10 of the 12 patients, some type of treatment had been given before the diagnosis of rumination syndrome, but was unsuccessful in all cases. Ten of our patients underwent the novel, experimental biofeedback therapy. Conclusions: Due to the limited knowledge of this condition among attending professionals in terms of the clinical presentation, diagnosis, and treatment, patients with rumination syndrome are often misdiagnosed and undergo numerous avoidable complementary tests, and invasive, costly treatments (AU)

[Attitudes towards cow's milk protein allergy management by spanish gastroenterologist]. / Manejo de la alergia a proteína de leche de vaca por los gastroenterólogos españoles.

INTRODUCTION: Food allergy is an increasing health problem in the developed world. Cow's milk protein is the main cause of food allergy in infants. Without an appropriate diagnostic workup, there is a high risk of both over- and underdiagnosis and therefore, over and undertreatment. The objective of our study was to analyze the variability in cow's milk protein allergy (CMPA) management by pediatric gastroenterologists in Spain. METHODS: A fifty item questionnaire, including open and closed items in a Likert's scale from 0 to 5, was drafted and distributed through the Spanish Society for Pediatric Gastroenterology, Hepatology and Nutrition (SEGHNP) e-mail list. RESULTS: Seventy-three questionnaires were received back out of 321. Only 3 of the items achieved concordance greater than 90%. Thirty-three percent considered oral challenge to be necessary for the diagnosis of CMPA under any circumstance. Twenty-five percent considered that symptom improvement after cow's milk removal was enough for the diagnosis. Oral challenge was performed at home by 83.5% in non-IgE mediated cases. Extensively hydrolyzed casein formulas were the treatment of choice for 69.9%. Soy formulas were the last option. Almost all respondents were aware of the existence of clinical guidelines on CMPA, being European Society of Pediatric Gastroenterology, Hepatology and Nutrition guidelines the most followed (64.4%). Twenty-three percent considered that their knowledge about allergy was inadequate. CONCLUSIONS: Although CMPA is a prevalent condition that pediatric gastroenterologists have been treating for decades, we found a huge variability on its management. There is potential for improvement in this field among pediatric gastroenterologist in the future.

[Rumination syndrome: Diagnostic and therapeutic difficulties of a not so uncommon disorder]. / Síndrome de rumiación: dificultades diagnósticas y terapéuticas de un proceso no tan infrecuente.

INTRODUCTION: Rumination syndrome is an uncommon gastrointestinal functional disorder that may be difficult to diagnose, as not many physicians are aware of this condition. In many cases, patients undergo numerous tests and are prescribed several treatments based on erroneous diagnoses. When the correct diagnosis is eventually made, therapy for the syndrome can be difficult and complex because of its multifactorial nature. The aim of this study was to present our experience with this condition, by presenting an analysis of the clinical, diagnostic, and therapeutic data of our patients. PATIENTS AND METHOD: A prospective and retrospective study was conducted on all cases of rumination syndrome diagnosed between January 2010 and May 2016 in patients attending the Paediatric Gastroenterology Departments of two hospitals: Consorci Sanitari de Terrassa and Hospital Materno-Infantil Vall d'Hebron (Barcelona, Spain). RESULTS: The analysis included 12 patients, with a mean age at the onset of symptoms of 9 years and 1 month, and the mean time period to make the diagnosis was 2 years and 3 months. A mean of 8.1 complementary tests were carried out before establishing the diagnosis. In 10 of the 12 patients, some type of treatment had been given before the diagnosis of rumination syndrome, but was unsuccessful in all cases. Ten of our patients underwent the novel, experimental biofeedback therapy. CONCLUSIONS: Due to the limited knowledge of this condition among attending professionals in terms of the clinical presentation, diagnosis, and treatment, patients with rumination syndrome are often misdiagnosed and undergo numerous avoidable complementary tests, and invasive, costly treatments.

Optimización de la actividad de las enzimas pancreáticos con comprimidos entéricos de bicarbonato sódico / Optimization of the bioactivity of pancreatic enzymes with the administration of enteric tablets of sodium bicarbonate

Fundamento. Valorar la efectividad y tolerancia de la administraciónde comprimidos entéricos de bicarbonato sódico con cubiertade ácido resistente con el fin de aumentar el pH duodenal y optimizarla actividad de los enzimas pancreáticos.Método. Fueron incluidos 21 pacientes (66 % varones y 34 % mujeres),con una media de edad de 11 años (intervalo 13-23) y un pesomedio de 32,24 ± 12,2 Kg (intervalo 13-52). Se formularon comprimidosentéricos de bicarbonato sódico de 225 mg con un diámetrode 7 mm con una disgregación de la envoltura a pH 5. Fueron determinadosen estado basal con solo enzimas (B) y tras 15 días detratamiento con bicarbonato (15 g/m2/24 h) repartido con los enzimasa las dosis habituales (CB) los siguientes parámetros en heces:amilasa, lipasa, quimotripsina, grasa, azúcar y proteínas. La dietafue similar durante todo el estudio.Resultados. Las dosis de lipasa administrada a nuestros pacientesmostró una media de 2.812 U (F.I.P)/kg/24 h (rango 5.700 U- 450 U),lo cual conlleva una media de esteatorrea de 7,79 g% (DE 3,28 g%).El estudio estadístico de correlación linear entre el aporte de lipasay los niveles de esteatorrea presentó una correlación negativa (r =0.16). Los resultados en heces mostraron: amilasa u/l (B) 5.273 ±3.825 vs 4.779 ± 3.147 (CB), lipasa u/l 268 ± 189 (B) vs 224 ± 167 (CB);quimotripsina u/l 32 ± 33 (B) vs 31 ± 28 (CB), grasa g% 7,3 ± 3 (B) vs7,79 ± 3,28 (CB), nitrógeno g % 1,6 ± 0,26 (B) vs 1,7 ± 0,32 (CB) y azúcarg% 1,71 ± 0,61 (B) vs 1,9 ± 0,64 (CB).Conclusiones. La determinación de amilasa, lipasa, quimotripsina ygrasa en heces mostraron un ligero descenso en algunos pacientes,pero sin alcanzar diferencia significativa como grupo. Futuros estudioscon un aumento de la dosis de bicarbonato y disgregación dela envoltura a un pH < 5 deberán ser efectuados(AU)

Objective. To evaluate the efficacy and tolerability of the administrationof acid-resistant enteric tablets of sodium bicarbonate toincrease the duodenal pH and optimize the activity of pancreaticenzymes in patients with cystic fibrosis (CF).Method. Twenty-one children (66% male) with CF were includedin the study. Median age was 11 years (range, 13-23), and meanweight was 32.24 ± 12.2 Kg (range, 13-52). Seven-mm sodium bicarbonatetablets (225 mg) were formulated with a coat dissolutionpoint of ph of 5. Stool content of amylase, lipase, chemotrypsine,fat, sugar and proteins were measured at baseline followingadministration of enzymes, and after 15 days of concomitant treatmentwith sodium bicarbonate (15 g/m2/24 hours). The diet wassimilar throughout the study period.Results. The median dose of lipase was 2,812 U (F.I.P.)/kg/24 hours(range 5,700 U-450 U) with a resulting steatorrhea of 7.79 g% (±3.28 g%). There was a negative linear correlation between lipaseadministration and steatorrhea levels (r=0.16). The stool studiesbefore (B) and after concomitant administration of sodium bicarbonate(CB) showed the following: amylase (u/l) 5,273 ± 3,825 (B)vs. 4,779 ± 3,147 (CB); lipase (u/l) 268 ± 189 (B) vs. 224 ± 167 (CB);chemotrypsine (u/l) 32 ± 33 (B) vs. 31 ± 28 (CB); fat (g%) 7.3 ± 3 (B)vs. 7.79 ± 3.28 (CB); nitrogen (g%) 1.6 ± 0.26 (B) vs. 1.7 ± 0.32 (CB);and sugar (g%) 1.71 ± 0.61 (B) vs. 1.9 ± 0.64 (CB).Conclusions. The stool content of amylase, lipase, chemotrypsineand fat showed a mild decrease in some patients after the concomitantadministration of sodium bicarbonate; however, differenceswere not statistically significant. Future studies with higher dosesof sodium bicarbonate and with coat dissolution point at pH < 5should be explored(AU)