Publications by authors named "Stephen M Megison"

Objective: Abdominal CSF pseudocysts are an uncommon but challenging complication of ventriculoperitoneal shunts. Pseudocysts consist of a loculated intraperitoneal compartment that inadequately absorbs CSF and may be infected or sterile at diagnosis. The treatment goal is to clear infection if present, reduce inflammation, and reestablish long-term function in an absorptive (intraperitoneal) space.

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Background: A multicenter study of pectus excavatum was described previously. This report presents our final results.

Study Design: Patients treated surgically at 11 centers were followed prospectively.

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Background: Duodenal injuries in children are uncommon but have been specifically linked with child abuse in case reports. Owing to the rarity of the diagnosis, few studies to date have looked at the association between duodenal injuries and mechanism in younger child. We hypothesize that duodenal injuries in the very young are significantly associated with child abuse.

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Objectives: Previous observational studies suggest that children with hand ischemia following elbow trauma can be safely observed if Doppler signals are present in the wrist arteries (pink pulseless hand, PPH). Nonoperative management of PPH is predicated on the assumption that PPH results from local arterial spasm, but the mechanism of arterial compromise has not been investigated. We hypothesized that PPH signifies a brachial artery injury that requires surgical repair.

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Objective: To determine whether pulmonary function decreases as a function of severity of pectus excavatum, and whether reduced function is restrictive or obstructive in nature in a large multicenter study.

Study Design: We evaluated preoperative spirometry data in 310 patients and lung volumes in 218 patients aged 6 to 21 years at 11 North American centers. We modeled the impact of the severity of deformity (based on the Haller index) on pulmonary function.

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Objective: We sought to use magnetic resonance (MR) imaging (MRI) to estimate percentage of fetal thorax occupied by lung, liver, and other abdominal organs in pregnancies with congenital diaphragmatic hernia (CDH).

Study Design: This was a retrospective study of pregnancies with isolated CDH referred for MRI between August 2000 and June 2006. Four regions of interest were measured in the axial plane by an investigator blinded to neonatal outcome, and volumes were then calculated.

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Objective: This study evaluated changes in both physical and psychosocial quality of life reported by the parent and child after surgical repair of pectus excavatum.

Methods: As part of a multicenter study of pectus excavatum, a previously validated tool called the Pectus Excavatum Evaluation Questionnaire was administered by the research coordinator, via telephone, to parents and patients (8-21 years of age) before and 1 year after surgery. Eleven North American children's hospitals participated.

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Objective: To describe pregnancy outcomes with fetal gastroschisis, including the associations of prenatal ultrasound findings with neonatal surgical complications and other morbidities.

Methods: This was a review of pregnancies complicated by fetal gastroschisis and delivered from January 1998 through June 2006. The last ultrasonogram before delivery was reviewed to determine stomach dilatation, bowel dilatation, or abnormalities of amniotic fluid volume.

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Background: Given widespread adoption of the Nuss procedure, prospective multicenter study of management of pectus excavatum by both the open and Nuss procedures was thought desirable. Although surgical repair has been performed for more than 50 years, there are no prospective multicenter studies of its management.

Study Design: This observational study followed pectus excavatum patients treated surgically at 11 centers in North America, according to the method of choice of the patient and surgeon.

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