Pediatric Surgery International

, Volume 28, Issue 11, pp 1085–1088

Age-related probability of contralateral processus vaginalis patency in children with unilateral inguinal hernia

  • Nigel J. Hall
  • Wonyong Choi
  • Agostino Pierro
  • Simon Eaton
Original Article

DOI: 10.1007/s00383-012-3174-7

Cite this article as:
Hall, N.J., Choi, W., Pierro, A. et al. Pediatr Surg Int (2012) 28: 1085. doi:10.1007/s00383-012-3174-7
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Abstract

Purpose

Contralateral groin exploration with closure of a patent processus vaginalis (PPV) in children with a unilateral inguinal hernia remains controversial. We aimed to generate precise, age-related probabilities of patency of the contralateral processus vaginalis (PV) in infants with a unilateral inguinal hernia to guide practice.

Methods

Retrospective review of all unilateral laparoscopic inguinal hernia repairs in 5 years to determine patency of contralateral PV. Using logistic binomial regression, age-adjusted odds ratio (OR), probability of contralateral PPV and number needed to explore (NNE) in order to close all PPVs were estimated.

Results

Data from 331 children [262 male, median 3.8 months corrected gestational age (CGA)] were analysed; 160 (48 %) had a contralateral PPV. In the regression model, CGA is linearly related to log[OR] such that for each month increase in CGA, the log[OR] of having a contralateral PPV decreased by 0.017 ± 0.006 (mean ± SEM; p = 0.005). Gender and side of hernia had no significant effect. The probability of contralateral PPV is 50 % (NNE = 2) at 8 m CGA, 33 % (NNE = 3) at 49 m and 25 % (NNE = 4) at 72 m.

Conclusions

These data contribute to our knowledge of the natural history of the PV and may help guide the need for contralateral groin exploration in infants with inguinal hernia.

Keywords

Infant Child Hernia Processus vaginalis Laparoscopy 

Copyright information

© Springer-Verlag 2012

Authors and Affiliations

  • Nigel J. Hall
    • 1
  • Wonyong Choi
    • 1
  • Agostino Pierro
    • 1
  • Simon Eaton
    • 1
  1. 1.Surgery Unit, Department of Paediatric SurgeryUCL Institute of Child HealthLondonUK

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