Pakistan Journal of Medical Sciences

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ISSN 1681-715X

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ORIGINAL ARTICLE

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Volume 25

January - March 2009

Number  1


 

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The validity of Ultrasound in Diagnosing
Hypertrophic Pyloric Stenosis

Mehdi Alehossein1, Faramarz Hedayat2, Payman Salamati3,
Hooshang Akhtar Khavari4, Mansour Mollaeian5

ABSTRACT

Objectives: To evaluate the validity of ultrasound for diagnosis and exclusion of pyloric stenosis in the infants with nonbilious vomiting.

Methodology: In a cross-sectional study, 444 consecutive infants with clinical suspicion of pyloric stenosis were evaluated by ultrasound (US) and categorized as pyloric stenosis or not according measuring parameters as muscle thickness, muscle width and canal length of pylorus. Positive findings were confirmed at surgery; Negative findings were confirmed by means of follow up. Sensitivity, specificity and accuracy were calculated.

Results: Sensitivity, specificity and accuracy of ultrasound were 100% if pyloric muscle thickness of >3mm was chosen as diagnostic. when muscle thickness more than 4mm was used, sensitivity, specificity and accuracy were 96%, 100% and 99.32% respectively.

Conclusions: Ultrasound is highly sensitive and specific if pyloric muscle thickness 3 mm is used as cut off point. By virtue of direct visualization of the pyloric muscle, ultrasound is method of choice for both the diagnosis and exclusion of pyloric stenosis in infants.

KEY WORDS: Diagnosis, Infant, Pyloric stenosis, Sensitivity and specificity, Ultrasonography.

Pak J Med Sci    January - March 2009    Vol. 25 No. 1    65-68

How to cite this article:

Alehossein M, Hedayat F, Salamati P, Khavari HA, Mollaeian M. The validity of Ultrasound in Diagnosing Hypertrophic Pyloric Stenosis. Pak J Med Sci 2009;25(1): 65-68


1. Mehdi Alehossein,
Assistant Professor of Radiology,
2. Faramarz Hedayat,
Pediatric Specialist,
3. Payman Salamati,
Assistant Professor of Community Medicine,
4. Hooshang Akhtar Khavari,
Assistant Professor of Pediatric Gastroenterology,
5. Mansour Mollaeian,
Associate Professor of pediatric Surgery,
1-5: Medical Sciences/ University of Tehran,
Bahrami Hospital, Shaheed Kiaee St,
Damavand Ave,
Tehran 16417, Iran.

Correspondence

Payman Salamati,
Bahrami Children’s Hospital,
Shaheed Kiaee Street, Damavand Avenue,
Tehran, Iran.
E- mail: psalamati@tums.ac.ir

* Received for Publication: June 20, 2008
* Accepted: November 16, 2008



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