Evaluation of gastroesophageal reflux in pediatric patients with asthma using impedance-pH monitoring

OBJECTIVES: To determine the proportion of acid and nonacid reflux events in children with asthma suspected to have gastroesophageal reflux (GER) using combined impedance-pH monitoring, and to determine the symptom index (SI) for nonacid and acid reflux events. STUDY DESIGN: This was a prospective study of children with asthma (age 5 months to 6 years) referred for evaluation of GER. Exclusion criteria were congenital anomalies, cerebral palsy, mental retardation, and cardiac disease. The children underwent a 20-hour multichannel intraluminal impedance (MII)-pH study. RESULTS: A total of 24 children (17 male; mean age, 33 months) were enrolled from March 2004 to February 2005. MII-pH detected 1184 reflux events, versus 419 reflux events by pH alone; 51% (605 events) were nonacid. The proportion of nonacid reflux events decreased with time elapsed from last meal (P < .0001 by Pearson's chi2 test). A total of 555 symptoms were recorded, including 331 cases of cough, 243 of which (73.4%) were not associated with a reflux event. The SI for MII-pH was significantly different than that for the pH probe (37% vs 0%; P = .008). CONCLUSIONS: Acid and nonacid reflux occurs with equal frequency in children with asthma. Most symptoms occur in the absence of a reflux event.     

Evaluation of infantile acid and nonacid gastroesophageal reflux using combined pH monitoring and impedance measurement

OBJECTIVE: Characterize the proportion of acid and nonacid esophageal reflux events in young infants with suspected gastroesophageal reflux (GER) using combined pH-multichannel intraluminal impedance (MII) monitoring. Determine the symptom index correlation with nonacid reflux and acid reflux events. STUDY DESIGN: Prospective study of children, aged 2 weeks to 1 year, referred to The Children's Hospital of Denver Gastroenterology Clinic for evaluation of GER. Exclusion criteria were congenital anomalies or syndromes, cerebral palsy, mental retardation, and pulmonary or cardiac disease. The children were admitted to The Children's Hospital General Clinical Research Center for a 20 hour pH-MII study. Acid suppression was either never used or discontinued 2 weeks before testing. RESULTS: Thirty-four infants were enrolled from February 2004 to February 2005. Ages ranged from 2 months to 11 months, median = 7 (20 females/14 males). One thousand eight hundred ninety reflux events were detected by MII, and 588 reflux events were detected by pH probe alone. The percent of reflux that was acid was 47% (888 events) versus 53% of (1,002 events) nonacid reflux events. The proportion of nonacid reflux decreased with age (P < 0.0001 by Pearson chi test) and with increasing time elapsed from last meal. There were 958 total symptoms evaluated. The most frequently reported symptom was fussiness/pain, which correlated with nonacid reflux events 24.6% and acid reflux 25.2%. The proximal height of a reflux was predictive for symptoms of fussiness/pain, arching, and burping. CONCLUSION: MII detects more reflux events than pH monitoring alone. The proportion of nonacid reflux to acid reflux events in infants is more similar to adults than previously reported. Combined pH-MII esophageal monitoring identifies more reflux events and improves clinical correlation with symptoms.     

24小时食管动态pH-阻抗联合监测评估小儿胃食管反流性咳嗽的临床特征

目的 探讨24 h食管动态pH-阻抗联合监测对以慢性咳嗽为主要表现的胃食管反流病（GERD）患儿的临床表现及反流特征的评估价值。方法 对2012年2月至2013年7月40例南京医科大学附属南京儿童医院门诊及住院的可疑胃食管反流性咳嗽（RERC）患儿,利用24 h食管pH-阻抗联合监测GERD患者的各项指标。结果 40例慢性咳嗽患儿中,单纯用24 h食管pH监测符合GERD的患儿有23例（57.5%）,利用24 h食管动态pH-阻抗联合监测符合GERD的患儿有34例（85.0%）,明显高于单纯用24 h食管pH监测的结果。且在小儿慢性咳嗽中主要是在直立时弱酸反流和酸反流为主（P＜0.05）,同时发生频率最高的在直立状态下的混合反流（P＜0.05）,而食团清除时间在直立与仰卧时差异无统计学意义（P＞0.05）,近端反流是以仰卧位为主（P＜0.05）。总反流次数与症状指数（SI）呈正相关（r = 0.818,P＜0.05）。结论 利用24 h食管动态pH-阻抗联合监测技术可以检出酸反流、弱酸反流和非酸反流,使GERD的诊断更精确,对以慢性咳嗽为主要表现的GERD有着重要的诊断价值,具有较好的临床应用前景。     

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??Abstract??Objective To investigate the characteristics of gastroesophageal reflux disease ??GERD?? with chronic cough by 24-hour ambulatory esophageal impedance-pH monitoring in children. Methods From February 2012 to July 2013?? 40 cases of inpatients and outpatients in Nanjing Children′s Hospital Affiliated to Nanjing Medical University?? who were suspected with gastroesophageal reflux cough ??RERC????were recruited??all these cases underwent 24-hour ambulatory esophageal impedance-pH monitoring. Results Among the 40 children with chronic cough?? 23 patients were diagnosed with GERD refering to pH monitoring??34 children were diagnosed with GERD by 24-hour ambulatory esophageal impedance-pH monitoring. Esophageal acid reflux were significantly higher in the upright than supine position ??P??0.05????and the characteristics of GERD with chronic cough was mainly weak acidic reflux and acid reflux in the upright ??P??0.05????the mixed reflux was the highest frequency in the upright ??P??0.05??. There was no difference between in the upright and supine position about the bolus clearance time??proximal reflux in the supine position was the main way in the total reflux ??P??0.05??. The total reflux and SI demonstrated positive correlation??r = 0.818?? P??0.05??. Conclusion Acid reflux?? weak acid reflux and non-acid reflux can be detected by 24-hour ambulatory esophageal impedance-pH monitoring. The 24-hour ambulatory esophageal impedance-pH monitoring can make more accurate diagnosis of GERD in chronic cough children??and it may have a good prospect for clinical application.     

Cough plate versus cough swab in patients with cystic fibrosis; a pilot study.

BACKGROUND: Accurate identification of lower respiratory tract pathogens is important in the management of cystic fibrosis patients. AIM: To evaluate the cough plate as an alternative method of obtaining respiratory samples for microbiological culture. METHODS AND RESULTS: Using sputum culture as the "gold standard", the cough plate method identified significantly more positive cases than either dry or moistened cough swabs. Of 20 patients who had a positive sputum culture, 16 had a positive culture on cough plate compared to seven positive cultures each on moistened swab and on dry swab respectively. CONCLUSIONS: In this study cough plates were more sensitive than cough swabs in isolating respiratory pathogens in sputum producers. As patients prefer it, the cough plate merits further evaluation, particularly in non-sputum producers.     

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目的探讨慢性孤立性咳嗽的病因诊断及其程序。方法从首都医科大学附属北京儿童医院2003年10月至2004年8月在门诊就诊的58例慢性咳嗽患儿中,首先筛选慢性孤立性咳嗽病例,进一步根据咳嗽特征、辅助检查、治疗反应等确定慢性孤立性咳嗽的病因。结果在58例慢性咳嗽的患儿中,筛选出慢性孤立性咳嗽50例,其中鼻后滴流综合征20例(8例慢性副鼻窦炎,6例慢性过敏性鼻炎,6例感染后鼻炎)、咳嗽变异性哮喘17例、感染后咳嗽5例、心理性咳嗽4例、原发性胃食道反流1例、嗜酸粒细胞性支气管炎2例、未明原因1例。结论儿童慢性孤立性咳嗽的病因有鼻后滴流综合征、咳嗽变异性哮喘、感染后咳嗽、心理性咳嗽等。根据咳嗽特征、辅助检查、治疗反应等能确定绝大多数慢性孤立性咳嗽的病因。     

Esophageal impedance monitoring for gastroesophageal reflux

Dual pH-multichannel intraluminal impedance (pH-MII) is a sensitive tool for evaluating overall gastroesophageal reflux disease, and particularly for permitting detection of nonacid reflux events. pH-MII technology is especially useful in the postprandial period or at other times when gastric contents are nonacidic.pH-MII was recently recognized by the North American Society for Pediatric Gastroenterology, Hepatology, and Nutrition and the European Society for Pediatric Gastroenterology, Hepatology, and Nutrition as being superior to pH monitoring alone for evaluation of the temporal relation between symptoms and gastroesophageal reflux. In children, pH-MII is useful to correlate symptoms with reflux (particularly nonacid reflux), to quantify reflux during tube feedings and the postprandial period, and to assess efficacy of antireflux therapy. This clinical review is simply an evidence-based overview addressing the indications, limitations, and recommended protocol for the clinical use of pH-MII in children.     

重庆地区202例儿童慢性咳嗽的病因研究

目的 探讨儿童慢性咳嗽的病因构成。方法 对2015年5月至2017年11月于重庆医科大学附属儿童医院住院治疗的202例慢性咳嗽患儿的临床资料进行回顾性分析。结果 202例患儿的病因分布为：感染后咳嗽81例（40.1%）,咳嗽变异性哮喘71例（35.1%）,上气道咳嗽综合征43例（21.3%）,异物吸入3例（1.5%）,胃食管反流性咳嗽1例（0.5%）,多发性抽动症2例（1.0%）,先天性呼吸道疾病1例（0.5%）。119例（58.9%）慢性咳嗽是单病因所致,83例（41.1%）有多种病因。不同年龄组（< 1岁、1岁~、3岁~、6~14岁）和不同咳嗽性质组（湿咳、干咳）慢性咳嗽病因构成差异均有统计学意义（P < 0.01）。结论 儿童慢性咳嗽的前三位主要病因为：感染后咳嗽、咳嗽变异性哮喘和上气道咳嗽综合征;不同年龄阶段及不同咳嗽性质的患儿其慢性咳嗽的主要病因存在差异。     

气道pH值监测在儿童慢性咳嗽与咽喉反流相关性判断中的价值

目的 探讨气道pH值监测在儿童慢性咳嗽与咽喉反流(laryngopharyngeal reflux,LPR)相关性判断中的价值.方法 对2016年1月至2019年12月274例慢性咳嗽患儿,采用DX-pH监测仪进行24 h气道pH值监测,分析儿童慢性咳嗽与LPR的相关性.结果 274例患儿中,男168例,女106例,中...     

福建省福州地区儿童慢性咳嗽病因分析

目的 探讨福建省福州地区儿童慢性咳嗽的病因.方法 根据中华医学会儿科学分会呼吸学组与<中华儿科杂志>编辑委员会2008年制定的<儿童慢性咳嗽诊断与治疗指南>的标准,对福建省福州儿童医院哮喘专科门诊诊断的364例慢性咳嗽患儿,按照指南的诊断流程询问病史,进行体检、辅助检查,初步确定病因后,并针对病因进行特异性治疗,分别在初诊后半个月、1个月、3个月对患儿进行随访,根据辅助检查及疗效判定病因诊断,进而分析病因构成比.结果 364例慢性咳嗽患儿病因依次为:咳嗽变异性哮喘171例(47.0%),上气道咳嗽综合征104例(28.6%),呼吸道感染和感染后咳嗽58例(15.9%),胃食管反流17例(4.7%),支气管异物3例(0.8%);引起慢性咳嗽只有单一病因的299例(82.1%),同时有2种病因的56例(15.4%),同时有3种病因的9例(2.5%).结论 福建省福州地区儿童慢性咳嗽的病因依次为咳嗽变异性哮喘、上气道咳嗽综合征、呼吸道感染和感染后咳嗽、胃食管反流、支气管异物;不同年龄组儿童慢性咳嗽病因构成比不同;部分患儿合并有2或3种病因,表明儿童慢性咳嗽病因呈多因素.

Abstract：

Objective Chronic cough in children is a common pediatric symptom with complex causes and its diagnosis is difficult; chronic cough affects the life of children in both physical and mental health and also learning. Therefore this study aimed to investigate the causes of chronic cough in children in Fuzhou area of Fujian province. Method Data were collected from 364 children with chronic cough who visited the asthma specialist clinic of Children's Hospital of Fuzhou, Fujian Province from March 2009 to April 2010. The diagnosis was made according to Guideline for Diagnosis and Treatment of Chronic Cough in Pediatrics published in 2008. Among the patients, 241 were boys and 123 girls. The patients were divided into 3 age groups: group 1, 1 to 3 years old ( infants and young children group, n =75); group 2, 4 to 6years old (pre-school group, n =215 ); and group 3, over 7 years (school-age group, n = 74), the mean age was (4.8 ± 1.1) years (3 months to 14 years), course of the illness was (4.5 ± 1.8) months (4 weeks to 38 months ). Mycoplasma pneumoniae was detected by Enzyme-linked immunosorbent assay (ELISA). Result The causes of chronic cough were as follows: 171 cases (46. 98% ) had cough variant asthma; 104 cases ( 28.57% ) had upper airway cough syndrome; 58 cases ( 15.93% ) had respiratory infections; 17 cases (4.67% ) had gastroesophageal reflux; 3 cases (0.82% ) had foreign bodies. Totally 9 cases (2.47% ) had chronic cough associated with 3 causes; 56 cases ( 15.38% ) had 2 causes and 299cases ( 82.14% ) had single cause. The main causes of cough in the group of pre-school children were cough variant asthma and upper airway cough syndrome. The proportion of the upper airway cough syndrome in school-age children group was the highest among the 3 age groups, which is flowed by cough variant asthma.Conclusion The causes of chronic cough in children were cough variant asthma, upper airway cough syndrome, respiratory infections, cough after infection, gastroesophageal reflux and foreign bodies in Fuzhou area of Fujian province. Children with chronic cough in different age groups had different etiology, in about 18% of the children the etiology of chronic cough was associated with 3 or 2 causes, indicating that the causes of chronic cough in children are multifactorial.     

Evaluation of the use of DMSA in culture positive UTI and culture negative acute pyelonephritis

This prospective study was done to assess the frequency of acute pyelonephritis (APN) in febrile children with positive urine culture as documented by Tc99m DMSA scintigraphy (DMSA) and the frequency of vesicoureteric reflux (VUR) in these children. Secondly, to determine the frequency of APN, in febrile children with supportive evidence for UTI but with negative urine culture, as documented by DMSA and frequency of VUR in them. Thirdly to stress the utility of DMSA to diagnose APN in urine culture negative febrile children and to suggest DMSA as a clinical tool in evaluation of fever of unknown origin (FUO). This study included 42 children with positive urine culture and 26 children with negative urine culture who had supportive evidence of UTI as determined by the predetermined criteria and diagnosed to have APN by DMSA. All of them had ultrasonogram (USG), DMSA and voiding cystourethrogram (VCU). They were followed up for a minimum period of 6 months. Out of the 42 children with positive urine culture 92.9% had features of APN in the DMSA of whom 82.1% had vesicoureteric relux (VUR). The DMSA was abnormal in 26 children with negative urine culture, of whom 65.4% had VUR. Ultrasound suggestive of parenchymal change was observed in 47.6% in the culture positive group and 65.4% in the culture negative group. In conclusion, it is suggested, that DMSA is a useful investigation for the diagnosis of APN in febrile UTI. DMSA is indicated in febrile children with negative urine culture but with supportive evidence of UTI and in FUO. An abnormal DMSA is a strong indication for work up for VUR.     

Comparison of upper gastrointestinal contrast studies and pH/impedance tests for the diagnosis of childhood gastro-oesophageal reflux

Background

The upper gastrointestinal (UGI) contrast study is used in the assessment of children with gastro-oesophageal reflux (GOR) and for detection of structural anomalies. The pH study is more sensitive than the UGI study for the diagnosis of GOR. The pH study has been replaced by the pH/impedance test, which detects both acid and nonacid reflux.

Objective

To compare the UGI contrast study with the pH/impedance test for the diagnosis of GOR in children.

Materials and methods

We retrospectively reviewed consecutive records of children investigated for GOR from October 2008 to February 2010, and compared the findings of UGI studies with those of pH/impedance tests.

Results

The UGI studies revealed GOR in 116 of 579 children (20%). Of the children undergoing a UGI study, 66 also underwent a pH/impedance test. Using the pH/impedance tests as the reference for GOR, UGI had a sensitivity of 42.8% and a negative predictive value of 24%. There was no significant correlation (P?>?0.05) between the reflux index and the number of reflux episodes in the pH/impedance tests and height of reflux in the UGI study. There were low incidences of malrotation (0.9%), hiatus hernia (1%) and delayed gastric emptying (0.4%).

Conclusion

The UGI study had low sensitivity for the diagnosis of GOR and low yield for the diagnosis of structural anomalies.     

Gastric organo-axial malrotation coexisting respiratory symptoms

Gastric malrotation is defined as a torsion of stomach around its short or long axis. It is a rare disease in childhood. Gastric malrotation may present either as a surgical emergency or as chronic abdominal symptoms. There is limited data about the respiratory symptoms associated with gastric malrotation. The aim of this study was to review the records of 14 children who presented with respiratory symptoms and diagnosed as gastric organo-axial malrotation. Between August 2005 and August 2007, 14 children diagnosed as having gastric organo-axial malrotation participated in this study. There were 11 boys and three girls with a mean age of 7.1 months. All patients were symptomatic. Presenting symptoms included wheezing in four patients, recurrent pneumonia in four, chronic cough in two, chronic cough and apnea in two, recurrent pneumonia and chronic cough in one, and chronic cough and failure to thrive in one. All of our patients had organo-axial gastric malrotation. Gastroesophageal reflux was found in nine patients (64.2%). Six patients were treated with surgery and antireflux medication and the remaining eight patients with antireflux medication. In conclusion, it is probable that gastric malrotation associated with massive or occult gastroesophageal reflux could be responsible for the respiratory symptoms such as chronic cough, recurrent pneumonia, wheezing, and apnea.     

Recurrent pulmonary disease in children: a complication of gastroesophageal reflux.

To evaluate the role of gastroesophageal reflux (GER) as a possible cause of recurrent pulmonary disease, 30 children, aged 1 to 18 years, were studied prospectively with esophageal function tests. These included esophagram (30 patients), esophageal manometry (29 patients), pH probe (Tuttle) test (29 patients), and esophagoscopy with esophageal biopsy (23 patients). The patients studied had either chronic asthma or two or more documented pneumonias within a one-year period. Nineteen (63%) had GER based on two or more positive tests. Eighteen had positive Tuttle tests; 13 had abnormal manometry studies; nine had esophagitis on biopsy; six had esophagitis on esophagoscopy; and five had reflux on esophagram. Of those with GER, 17 had a history of nocturnal cough and eight vomited during infancy. Children with recurrent pulmonary disease should have esophageal function testing to exclude GER as the cause.     

Fundoplication in children with gastro-oesophageal reflux disease

OBJECTIVES: The associations between gastro-oesophageal reflux (GOR), chronic respiratory symptoms and gastrointestinal complications have been well described. The aim of this study was to compare the characteristics of children in whom the main indication for fundoplication was respiratory disease with children who had gastrointestinal indications for surgery. METHODS: A retrospective review of 79 children who underwent fundoplication between January 1995 and December 1999. RESULTS: Forty-nine of the children (62%) had a respiratory indication for fundoplication. Children with neurological impairment tended to have a respiratory rather than a gastrointestinal indication for surgery. Congenital anomalies were present in 47%. Fundoplication in older children was more likely to be for a gastrointestinal indication. Children with neurological impairment were more likely to have a gastrostomy compared to children with normal neurological status (P < 0.01). Children with a respiratory indication were more likely to have three or more diagnostic investigations (P < 0.001). Ninety-two per cent of children with a respiratory indication and 90% with a gastrointestinal indication for fundoplication had at least one positive test for GOR (barium meal or 24-h oesophageal pH monitoring). Oesophagoscopy showed reflux oesophagitis in 46/61. Eighty-five per cent of the children had complete resolution of their symptoms after fundoplication. CONCLUSIONS: Neurological comorbidity was common in children who had surgery for gastro-oesophageal reflux disease, whether for gastrointestinal or respiratory indications. The majority of fundoplications were performed for respiratory indications.     

Diagnostic testing and discharge coding for whooping cough in a children's hospital

OBJECTIVE: To evaluate the diagnostic pathways for whooping cough in a large urban paediatric hospital to inform assessment of the relative merits of notification and hospitalization data for measuring pertussis disease burden in Australian children. METHODS: All laboratory requests for Bordetella pertussis (BP) culture or serology between 30 June 1997 and 30 June 1999 were reviewed and cross-checked against discharge diagnoses with International Classification of Disease (ICD) codes A37.0, 033.0 (whooping cough due to BP) or 37.9, 033.9 (whooping cough due to unspecified organisms). Culture-positive (CP) cases were defined as a positive culture or polymerase chain reaction for BP. Culture-negative (CN) cases either fulfilled the current Australian clinical case definition (>/=14 days of cough with one or more of paroxysms, whoop, post-tussive vomiting), or had a cough illness with either positive BP serology or documented contact with an individual coughing for >14 days. In infants <6-months-old, a coughing illness with apnoea and negative investigations for other causes was also accepted. Culture positive and CN cases were cross-referenced with notification data. RESULTS: During the study period, laboratory tests for BP were performed in 677 children, of whom 230 were hospitalized and 71 (31%) had an eligible ICD code at discharge; 29 were CP, 40 CN, and two (3%) were misclassified. A further 14 CP children were not admitted. Although 61 hospitalized cases (88%) fulfilled notification criteria, including 32 (80%) of CN cases, only 26 (90%) of CP and eight (20%) of CN cases were notified. CONCLUSIONS: Notifications substantially under-enumerate hospitalized infant cases, especially those without positive laboratory tests. Hospital discharge data add significantly to surveillance for pertussis, particularly in infancy where most severe cases occur.     

Urinary N-acetyl-beta-glucosaminidase and the selection of children for radiologic evaluation after urinary tract infection

Urinary levels of N-acetyl-beta-glucosaminidase (NAG) were measured in 147 consecutively enrolled children younger than 13 years of age with urinary tract infection to determine whether elevated levels were a predictor of urologic abnormalities. The children were classified as having cystitis if results of 0 or 1 of the following tests were positive and as having pyelonephritis if results of greater than or equal to 2 tests were positive: (1) temperature greater than 38 degrees C, (2) serum C-reactive protein greater than 1 mg/dL, (3) erythrocyte sedimentation rate greater than 25 mm/h, and (4) 1-deamino-8-D-arginine vasopressin-renal concentrating protein less than 810 mOsm/kg. Urinary NAG to creatinine ratios did not distinguish cases of cystitis from those of pyelonephritis. Urinary NAG was useful in identifying children with cystitis who had vesicoureteral reflux of grades II through V. Of 6 children with cystitis and vesicoureteral reflux, 5 had levels of NAG more than 1 SD above the mean, whereas of 75 children without vesicoureteral reflux, only 15 had such an elevation (P = .003). Of those children with a normal NAG level, 60 (98.4%) had normal radiologic evaluation results, and only 1 child (1.6%) had vesicoureteral reflux. Levels of NAG did not identify children with pyelonephritis who had vesicoureteral reflux. It is concluded that (1) urinary NAG is of no value in localizing the site of urinary tract infection, and (2) an NAG level within 1 SD of the mean in a child with cystitis indicates a low risk of urologic abnormalities, and radiologic evaluation may be omitted unless infection recurs.     

儿童原发性纤毛运动障碍的临床研究

目的 系统性研究儿童原发性纤毛运动障碍(primary ciliarydyskinesia,PCD)的临床特点,探讨PCD的诊断和鉴别诊断流程.方法 对PCD患儿的临床资料进行分析.结果 确诊PCD患儿26例,男11例,女15例.来自25个家族,1个家族诊断2例Kartagener综合征同胞姐弟.起病年龄为生后第2天～15岁,确诊时病程中位数为3.5年.所有患儿有咳嗽症状,24例有咯痰,7例有体格发育落后.23例接受支气管黏膜和(或)鼻黏膜的电镜检查,可见纤毛动力臂缺失6例,动力臂数目减少、微管排列紊乱、外周微管和(或)中央微管异常各4例,1例纤毛结构正常.经胸部CT证实,支气管扩张症8例,肺实变6例.20例存在鼻窦炎.15份痰或支气管肺泡灌洗液培养阳性标本中,铜绿假单胞菌8份,肺炎链球菌5份,白色念珠菌2份.其中1例培养出2种微生物.肺功能检查的16例中9例为阻塞性通气功能障碍.4例听力检测中3例异常,食管24 h pH值测定的5例患儿中3例有胃食管反流.结论 PCD起病年龄从新生儿期到青春期,呈慢性病程.主要临床表现为咳嗽、咯痰,可出现体格发育落后.PCD患儿中最多见的纤毛结构异常是动力臂缺失.部分患儿纤毛结构正常.影像学异常包括肺实变、支气管扩张症和鼻窦炎.常见的细菌病原为铜绿假单胞菌、肺炎链球菌,并可能存在混合感染.PCD患儿肺功能异常主要为阻塞性通气功能障碍,听力损害、胃食管反流出现率较高.     

Persistent cough in children and the overuse of medications

OBJECTIVE: Children referred for persistent cough were evaluated for the referring and final diagnosis, and the extent of the use of medications prior to referral and the side effects encountered. METHODS: Data on children seen by respiratory paediatricians for persistent cough (> or =4 weeks) in a tertiary respiratory setting were collected prospectively over 12 months. RESULTS: Of the 49 children, 61.2% were diagnosed with asthma at referral, with similar referral rates from general practitioners and paediatricians. Children with isolated cough were just as likely to have been diagnosed with asthma as children with cough and wheeze. Medication use (asthma, gastro-oesophageal reflux and antibiotics) prior to referral was high, asthma medications were most common, and of these 12.9% had significant steroid side effects. The most common abnormality found (46.9%) was a bronchoscopically defined airway lesion, and in 56.5% of these children, another diagnosis (aspiration, achalasia, gastro-oesophageal reflux) existed. No children had a sole final diagnosis of asthma and pre-referral medications were weaned in all children. CONCLUSION: Over diagnosis of asthma and the overuse of asthma treatments with significant side effects is common in children with persistent cough referred to a tertiary respiratory clinic. Children with persistent cough deserve careful evaluation to minimize the use of unnecessary medications and, if medications are used, assessment of response to treatment is important.     

Diagnostic accuracy of pH monitoring in gastro-oesophageal reflux.

One hundred and eleven children admitted with suspected gastro-oesophageal reflux were studied, with 24 hour oesophageal pH monitoring as the first line of investigation. Barium swallow examination, or oesophagoscopy, or both, were carried out only in children with abnormal pH, who subsequently had a trial of 1-12 months medical treatment. All patients were followed up for eight months to two years. A final diagnosis of gastro-oesophageal reflux was made in 41 patients, in all of whom the pH study was abnormal (100% sensitivity). The final diagnosis was different in 70 patients; 66 of these had a normal pH (94% specificity). All children with gastro-oesophageal reflux were treated with drugs. All those with a percentage reflux time of more than 27 and more than 20 episodes of reflux lasting more than 5 minutes failed to improve and needed operation. We conclude that monitoring of the oesophageal pH should be the first line of investigation in patients with gastro-oesophageal reflux and should be used together with clinical data and other investigations, to identify those children who will need operation.