title: [Study on intra-abdominal pressure in indirect inguinal hernia patients].
abstract: OBJECTIVE
  To investigate intra-abdominal pressure (IAP) and its changes in patients with indirect inguinal hernia and non-hernia diseases.
  
  
  METHODS
  Supine IAP (SIAP), supine Valsava IAP (SVIAP), orthostatic IAP (OIAP) and orthostatic Valsava IAP (OVIAP) were measured by intra-vesicle pressure measurement in 19 indirect inguinal hernia patients and 20 non-hernia patients, respectively. The differences of IAP between orthostatic and supine position in quiescent condition (OSIAPD), before and after taking Valsava maneuver in supine position (SVIAPD) or in orthostatic position (OVIAPD), orthostatic and supine position when taking Valsava maneuver (OSVIAPD) were compared between the two groups.
  
  
  RESULTS
  There was no significant differences in SIAP, OIAP, SVIAP, OSIAPD, SVIAPD between the two groups (P > 0.05). While patients with indirect inguinal hernia had higher OVIAP (P < 0.05). Significant differences in OVIAPD and OSVIAPD was found between the two groups (P < 0.05).
  
  
  CONCLUSIONS
  The etiology of indirect inguinal hernia were related to orthostatic position, increasing IAP and changes of anatomic structures. The IAP is prone to elevated in patients with indirect inguinal hernia.
authors.affiliation: Center of Hernia Therapy of South China, Department of Gastrointestinopancreatic Surgery, the Second Affiliated Hospital, Sun Yat-sen University, Guangzhou 510120, China.
authors.forename: Tai-cheng
authors.initials: TC
authors.lastname: Zhou
authors.forename: Bin
authors.initials: B
authors.lastname: Yang
authors.forename: Yu-chao
authors.initials: YC
authors.lastname: Zhang
authors.forename: Li
authors.initials: L
authors.lastname: Zhang
authors.forename: Shuang
authors.initials: S
authors.lastname: Chen
mesh_terms: D000005:Abdomen / Q000503:physiopathology*; D000328:Adult; D000368:Aged; D006552:Hernia, Inguinal / Q000473:pathology / Q000503:physiopathology*; D006801:Humans; D008297:Male; D008875:Middle Aged; D011312:Pressure