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TDK conference 2017

Prospective evaluation of correlations between certain clinical parameters of perineal hernia in dogs
Madej Anita - year 6
University of Veterinary Medicine, Clinic of Surgery and Ophtalmology
Supervisor: Dr. Tibor Németh


The topic of our TDK research is perineal hernia which is rather rare in veterinary practice, and most common in dogs. The aim was the clinical evaluation and analysis of data collected by current standard surgical procedures and withdrawing conclusions which may be important in clinical practice. Our hypothesis was whether there is a positive correlation between the duration of the anamnesis and the severity of the clinical symptoms, moreover if the consequent colorectal dilatation influences the clinical outcome of the surgical treatment. Data of 47 diagnosed and operated perineal hernia cases were collected and analysed at the Surgical Department of the University of Veterinary Medicine within two years. The incidence of the disorder was typical in older, non-castrated male dogs. The median age amongst small dogs (like bichon bolognese, havanese) was about 108 months (9 years). To investigate the correlation between the perineal hernia and the colorectal dilatation 2 procedures were used based on radiologic terms and measures: the O'Brien and the Lee&Leowijuk formula. According to our results the sensitivity of the two procedures was divergent. The disorder using the O'Brien formula was detected in 5 cases, while using the Lee&Leowijuk formula in 15 cases, therefore there are 10 cases which were classified by O'Brien formula negative, but positive by the Lee&Leowijuk method. In 4 cases out of 47 we have not found any rectum-deviation (flexura/ sacculation/ diverticulum). We also examined whether the rectum-deviation can be predicted by comparing the result of pre-operational rectal examination and the exact diagnosis made after surgery. The results had shown that all the cases diagnosed by rectal examination with rectal flexure turned out to be positive. Along with that, 23 cases seemed to be rectal sacculations at the rectal exam, but 9 of them turned out to be false positive (being only rectal flexures). We also made analysis in relation with the long-continued development of perineal hernia and the consecutive colorectal changes, assessing the correlation between the length of the anamnesis and the post-operative clinical outcome. Based on the collected data and the anamnesis told by the owners we can conclude that there is no significant correlation between the duration of the anamnesis and the occurrence of megacolon using either O'Brien or Lee&Leowijuk method. In case of each dog we have later reached owners by phone, and asked to answer our questions using a 5-grade scale (1: worst to 5: best). The evaluation of the six-month results showed that owners were satisfied with the surgery in 37 out of 47 cases (78,7%), in 3 cases the opinion was mixed (6,4%) and 2 (4,3%) owners were not satisfied with the operation. Unfortunately we could not reach the owners in case of 6 dogs (10,6%)

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