Israel Medical Association Journal

Background: Cholestasis is a frequent problem in patients on total parenteral nutrition. Cisapride has a prokinetic effect on the biliary system, but its effect on hepatic excretory function is unknown.

Objectives: To study the effect of cisapride on TPN-induced cholestasis in a rat model.

Methods: Bile flow and bile salt secretion rate were measured in rats given TPN. There were four groups of 8 to 13 animals each. After a one hour baseline period during which all four groups received i.v. saline infusion, two groups received a TPN solution for another 2 hours, while saline was infused in the two control groups.

At the beginning of the second hour, 2 mg/kg cisapride was injected i.v. as a bolus into one experimental and one control group. Bile was collected from the common bile duct.

Results: At the end of the third hour, TPN caused a significant reduction in bile flow (P<0.02) and bile salt secretion rate (P<0.001) (61.24 vs. 50.74 µl/min/kg, and 1.173 vs. 0.799 µmol/min/kg, respectively). Addition of cisapride abolished the cholestatic effect of TPN.

Conclusions: Cisapride has a protective effect against TPN-associated cholestasis. This may have clinical significance, and further studies are warranted.

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TPN= total parenteral nutrition
 

Background: Inflammation is a major component in the pathogenesis of asthma. CD14 is an endotoxin (lipopolysaccharide) receptor, and is expressed mainly on monocytes and macrophages. Binding of LPS to CD14 activates the monocyte or macrophage and causes the release of different cytokines.  The soluble form of CD14 is present in serum, and its concentration increases in several clinical conditions, including infections, auto-immune disorders, allergic disorders, and lung diseases.  The possible role of CD14/sCD14 in asthma has been investigated in a few adult patients only.

Objectives: To measure serum concentrations of sCD14 in children with status asthmaticus.

Methods: We compared serum concentration of sCD14 in 10 children with status asthmaticus measured within 24 hours of admission and after recovery from the acute episode.

Results: Levels of sCD14 were significantly higher during acute asthma attacks than at recovery.

Conclusions: The elevated serum levels of sCD14 during status asthmaticus may be the result of the activation of monocytes, macrophages or other cells.  The influence of medications on serum sCD14 cannot be ruled out.  The possible use of sCD14 as a marker of lung inflammation in asthma warrants further investigation. 

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LPS= lipopolysaccharide

SCD14= soluble form of CD14

 

Background: Anomalous origin of the left coronary artery from the pulmonary artery is a rare congenital malformation that presents a diagnostic challenge to the pediatrician and pediatric cardiologist. Although surgical repair is always indicated, the optimal technique has yet to be determined.      

Objectives: To review our experience with the diagnosis of children with ALCAPA and to assess short to midterm surgical results.

Methods: Between 1992 and 1998, 13 infants and children (2 months to 15 years) were treated for ALCAPA at our medical center. Eight were diagnosed during the first year of life; all were symptomatic and had severe dysfunction of the left ventricle. The five patients diagnosed at an older age had normal myocardial function. Diagnosis was established by echocardiography alone in seven patients; six required catheterization (one infant and all older patients). Surgery was performed in 12 patients to establish dual coronary artery system: 7 underwent the Takeuchi procedure and 5 had re-implantation of the anomalous left coronary artery.

Results: One infant died shortly after diagnosis before surgical repair was attempted, and one died postoperatively. Four patients required additional surgery: three for late complications of the Takeuchi procedure and one valve replacement for mitral insufficiency. Recent evaluation revealed good global left ventricle function in all patients except for one, who is still within the recovery phase and shows gradual improvement. However, most patients who presented with severe myocardial dysfunction upon diagnosis still display abnormal features such as echo-dense papillary muscles or evidence of small akinetic segments. In this group, early repair was associated with faster myocardial recovery.

Conclusions: The diagnosis of ALCAPA remains a clinical challenge to the pediatrician and cardiologist. Diagnosis can be established echocardiographically, and early diagnosis and treatment may lead to faster myocardial recovery. The preferred surgical method appears to be re-implantation of the ALCA. The chance for good recovery of global ventricular function is high even in the sickest patients, nonetheless abnormal myocardial features can be identified even years after surgery.

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ALCAPA= anomolous origin of the left coronary artery from pulmonary artery.

Background: Erythema nodosum, although uncommon in children, is the most frequent form of panniculitis in pediatrics.  EN has been associated with various infections and chronic inflammations, and its course varies with age, gender, and racial and geographic factors.  There is no information on EN in Israeli children.

Objectives: To examine the clinical course of EN and the conditions with which it is associated in Israeli children.

Methods: We conducted a retrospective study of 24 children with a diagnosis of EN who presented at our Center over a 10 year period (1989–98).

Results: EN was more frequent in females than males (ratio 2:1) due to a cluster of adolescent girls. The mean duration of the skin manifestation was 18 days. The course was benign in all patients. Streptococcal infection was the most common cause (25%), followed by Epstein-Barr virus infection (18%) and inflammatory bowel disease (13%).  In one-third of cases, no specific cause could be identified. Tuberculosis, an important cause of EN in the past, was not found in our patients.

Conclusions: Most cases of EN in Israeli children are related to streptococcal and EBV infections or to chronic inflammatory conditions. Despite the increase in tuberculosis morbidity in Israel during recent years, we found no association of EN and tuberculosis in our study.

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EN = erythema nodosum

EBV = Epstein-Barr virus

Objectives: To evaluate the association between chronic infection with C. pneumoniae, as measured by a high titer of IgG antibody, and CAD. Our study was designed to explore the relationship between seropositivity to C. pneumoniae and serious coronary events, and to assess whether or not there may be an additional association between established cardiovascular factors and infection with this organism.

Methods: The serum of 130 patients with proven CAD was tested for the presence of IgG antibodies to C. pneumoniae using an ELISA test. A titer ≤1:64 using the microinfluorescence method, the recognized "gold standard," correlates with a positive result when using the ELISA method. The mean age was 57 (40-65 years). The patients, 82% male and 18% female, had either myocardial infarction (n=109) or unstable angina (n=21) 6 months before the investigation (range 3-24 months). The serum for the control group was obtained from 98 blood donors from the same area matched for age 52 (40-58 years) and sex. The donors had no known cardiac history.

Results: In the CAD group 75% of patients were positive for C. pneumoniae compared to 33% in the control group (P=0.001). No increased correlation could be demonstrated between traditional risk factors and C. pneumoniae infection, except in those patients with diabetes mellitus. We found a lower prevalence of IgG antibody to C. pneumoniae in the diabetes subgroup than in other subgroups (P<0.006), but a higher prevalence than in the control group.

Conclusions: We demonstrated a more than twofold increase in seropositivity to C. pneumoniae among patients suffering serious coronary events, and this trend was independent of gender, age or ethnic group. These findings suggest that chronic C. pneumoniae infection may be a significant risk factor for the development of CAD, but this correlation should be investigated further.

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CAD= coronary artery disease

Objective: To evaluate the contribution of computerized tomography to the diagnosis of Takayasu's arteritis.

Methods: A retrospective analysis of the diagnostic process was recently conducted in three consecutive patients diagnosed over the last 3 years.

Results: Three females of Arab origin with Takayasu's arteritis were recently identified by CT. In two of the three patients the imaging procedure was performed for different working hypotheses, and the radiological findings (wall thickening, perivascular edema, and segmental intraluminal obliteration of the aorta and its major branches) were unexpected. In these two patients, repeated physical examination following the imaging procedure disclosed initially missed findings that could have led to an earlier consideration of Takayasu's arteritis (bruits above the epigastrium, subclavian and carotid arteries, and absent brachial pulses). Retrospective analysis of the patients' symptoms following CT revealed the true nature of the patients' misinterpreted complaints (e.g., typical abdominal angina replaced a faulty obtained history compatible with renal colic or dyspepsia). In the third patient CT was performed for the evaluation of an epigastric bruit associated with constitutional complaints. The diagnosis of aortitis, based upon the presence of diffuse aortic wall thickening and edema of the surrounding fat, without intraluminal narrowing, could have been missed by angiography, the traditional "gold standard" diagnostic procedure. All three patients complained of ill-defined epigastric abdominal pain and had epigastric tenderness during examination.

Conclusions: CT has the potential for detecting Takayasu's disease and may be superior to angiography, particularly at the early non-obliterative stage. Since the diagnosis of Takayasu's disease is rarely considered, the expanding use of CT and MRI technologies may reveal missed cases that are evaluated for other plausible diagnoses. The true incidence of Takayasu's arteritis in Israel may be much higher than reported, particularly in the Arab population. Our findings suggest that epigastric tenderness, originating from active inflammatory reaction in the abdominal aortic wall, should be considered as a diagnostic criterion of Takayasu's aortitis.

Background: Acute respiratory distress syndrome is a well-recognized condition resulting in high permeability pulmonary edema associated with a high morbidity.

Objectives: To examine a 10 year experience of predisposing factors, describe the clinical course, and assess predictors of mortality in children with this syndrome.

Methods: The medical records of all admissions to the pediatric intensive care unit over a 10 year period were evaluated to identify children with ARDS¹. Patients were considered to have ARDS if they met all of the following criteria: acute onset of diffuse bilateral pulmonary infiltrates of non-cardiac origin and severe hypoxemia defined by <200 partial pressure of oxygen during ³6 cm H2O positive end-expiratory pressure for a minimum of 24 hours. The medical records were reviewed for demographic, clinical, and physiologic information including PaO2² /forced expiratory O2, alveolar–arterial O2 difference, and ventilation index.

Results: We identified 39 children with the adult respiratory distress syndrome. Mean age was 7.4 years (range 50 days to 16 years) and the male:female ratio was 24:15. Predisposing insults included sepsis, pneumonias, malignancy, major trauma, shock, aspiration, near drowning, burns, and envenomation. The mortality rate was 61.5%. Predictors of death included the PaO2/FIO2, ventilation index and A-aDO2³ on the second day after diagnosis. Non-survivors had significantly lower PaO2/FIO2 (116±12 vs. 175±8.3, P<0.001), and higher A-aDO2 (368±28.9 vs. 228.0±15.5, P<0.001) and ventilation index (43.3±2.9 vs. 53.1±18.0, P<0.001) than survivors.

Conclusions: Local mortality outcome for ARDS is comparable to those in tertiary referral institutions in the United States and Western Europe. The PaO2/FIO2, A-aDO2 and ventilation index are valuable for predicting outcome in ARDS by the second day of conventional therapy. The development of a local risk profile may allow early application of innovative therapies in this population. 

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¹ARDS = acute respiratory distress syndrome

² PaO2 = partial pressure of oxygen

³A-aDO2 = alveolar–arterial O2 difference

Objectives: To assess the risk factors for malignant melanoma among kibbutz members compared to matched healthy controls.

Methods: We conducted a case-control study of 168 malignant melanoma patients and 325 healthy controls, matched by age and gender. Data were collected on three categories of risk: demographic, personal (e.g., skin, eye and hair color), and environmental/behavioral (e.g., sun exposure, use of sunscreens).

Results: There were no differences between the groups regarding sociodemographic data. Significantly more patients than controls had fair, vulnerable skin (P<0.001), light eyes (P<0.05), and fair hair (P<0.001). There was no difference in family history of malignant melanoma or other cancers. Patients with malignant melanoma had significantly more additional skin lesions (e.g., keratoses) (P<0.001). More patients than controls recalled having been exposed to the sun for long periods when they were 6–13 years of age. A conditional logistic regression analysis showed that fair hair, fair vulnerable skin, and additional skin lesions were independently associated with malignant melanoma (P<0.01).

Conclusions: The main target population for interventions to reduce the incidence of malignant melanoma among kibbutz members should be individuals with these risk factors. A history of increased exposure to the sun from age 6 to 13 should also be taken into account as an independent risk factor. 

Objective: To evaluate the efficacy of balneotherapy at the Dead Sea area in patients suffering from osteoarthritis of the knees.

Methods: Forty patients were randomly allocated into four groups of 10 patients. Group I was treated by bathing in a sulphur pool, group 2 by bathing in the Dead Sea, group 3 by a combination of sulphur pool and bathing in the Dead Sea, and group 4 served as the control group receiving no balneotherapy. The duration of balneotherapy was 2 weeks.

Results: Significant improvement as measured by the Lequesne index of severity of osteoarthritis was observed in all three treatment groups, but not in the control group. This improvement lasted up to 3 months of follow-up in patients in all three treatment groups.

Conclusion: Balneotherapy at the Dead Sea area has a beneficial effect on patients with osteoarthritis of the knees, an effect that lasts at least 3 months.