16
:1:o~~I.J21 • ::<11 8 l:! ::<11 1 ~ 2002'-j Vol. 8. No. 1. June 2002
Ultrasonographic Evaluation in Patients with Inguinal Hernia
Ohkyoung Kwon, MD., Jinbyang Jung, MD., Jinyoung Park, M.D., Sooil Chang, MD.Department of Surgery, School of Medicine, Kyungpook National University Taegu, Korea
Between March 1999 and January 2000, 82 boys with the diagnosis of inguinal hernias (12 bilateral and 70 unilateral hernias), underwent Ultrasound (US) examination of both sides of the groin, a total of 164 inguinal imaging prior to surgery. The patients ages ranged from 3 days to 12 years with a mean of 32.6 months. Ninty four examinations were on the clinically symptomatic side and 70 were on the asymptomatic side. The US criteria for the diagnosis of an inguinal hernia were as follows: 1) visceral hernia, the presence of bowel loops, or omentum in the inguinal canal, 2) communicating hydrocele, the presence of fluid in the processus vaginalis, 3) widening of patent processus vaginalis at the level of internal inguinal ring. The width of patent processus vaginalis at the level of internal inguinal ring over 4 mm is considered an occult hernia.
Among the 94 symptomatic groins, US findings showed 31 (33 %) visceral hernias, 18 09 %) communicating hydroceles, and 38 (41 %) widening of the internal inguinal ring, and 7 (7 %) groins without abnormalities. In 70 asymptomatic groins, there were 4 (6 %) visceral hernias, 5 (7
%) communicating hydroceles, 11 (16 %) widening of the internal inguinal ring, and 50 (70 %) groins without abnormalities. Among the 70 asymptomatic groins there were US abnormalities in 20 (28 %). One hundred and seven groins with positive US findings were surgically explored.
Among 107 operated sites, the operative findings were compatible with the US diagnosis in 104, a sensitivity for US of 97.2 %. In patients with US findings of widening of internal inguinal ring 04 mm), there was patent processus vaginalis in 36 out of 38 symptomatic groins and 10 of 11 asymptomatic groins. The sensitivity of US to the operative findings in widening of internal inguinal ring was 93.8 %. For visceral hernia and communicating hydrocele, the sensitivity of positive US findings was 100 %. Ultrasonography for inguinal hernias appears to be a rapid, reliable, and noninvasive screening diagnostic tool with high positive specificity. Therefore, we recommend the use of US as a routine diagnostic tool in pediatric patients with inguinal hernias and hydroceles. (.J Kor Assoc Pediatr Surg 8(1):16-22), 2002.
Index Words: Inguinal hemia, Ultrasonography
Correspondence: Sooil Chang, MD., Department of Surgery, Kyungpook National University Hospital, 50 Samduk-2Ga, Chung-gUo Taegu 700-721, Korea
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Fig. 3. Ultrasonogram, showing fluid filled tubular structure in the inguinal canal.
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Visceral hernia
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Fig. 4. Ultrasonoram of indirect inguinal hernia, that showes widening of the processus vaginalis at the level of internal inguinal ring.
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22
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