Morphologic evaluation of the use of a latex prosthesis in videolaparoscopic inguinoplasty: an experimental study in dogs

Abstract

PURPOSE:To evaluate the morphological aspects of the behavior of 4 types of latex biomembranes implanted in preperitoneal videolaparoscopic inguinoplasty. METHODS: Sixteen inguinoplasties were performed in 12 dogs: group 1 received an impermeable latex biomembrane in the right inguinal region and a prolene prosthesis, as control, in the contralateral inguinal region; groups 2, 3 and 4 received latex biomembranes respectively containing impermeable polyamide, 1-mm thick porous polyamide and 0.5-mm thick porous polyamide. Macro-and microscopic evaluations of the inguinal region and of the removed implants were made on the 7 th , 14 th , 21 st and 28 th days in group 1 and on the 28 th postoperative day in the other groups. RESULTS: We observed absence of hematoma, seroma and infection; presence of tortuosities; induction of vascular neoformation, inflammatory reaction and collagen deposition, and full encystment of the latex biomembranes, except that with fine porous polyamide, which was partially incorporated, with the formation of microcysts. No latex biomembrane induced fibrosis as observed in the prolene control group. CONCLUSIONS: The biomembranes maintain induction of the healing process without fibrosis, are fully encysted and, except for the one with fine porous polyamide, are not incorporated into adjacent tissues. The latex biomembrane, with or without polyamide, is not recommended as a separate material for preperitoneal inguinoplasty.

Laparoscopic assisted percutaneous herniorrhapy in dogs using PIRS technique

“…The authors of the presented study did not identify any of the above-mentioned postoperative complications. The obtained results are comparable with those reported by other authors who experimentally used endoscopic surgery to close inguinal canals in dogs [15,21]. However, it should be taken into account that the groups of animals involved in the assessment of minimally invasive methods were small.…”

“…Yet, the authors point out that laparoscopic repair of the inguinal hernia has not yet been reported in a series of dogs or cats [14]. Sousa et al [21] present an experimental study into the application of various prostheses in the laparoscopic treatment of inguinal hernia in dogs. Yet, the authors do not describe the endoscopic technique used in the surgery.…”

“…The intervention lasts less than 30 minutes for unilateral hernias. It is impossible to objectively compare the operative time to other methods hindered by lack of information in the literature regarding completely laparoscopic techniques [21,22], assisted by laparoscopy [14] or open surgeries [31]. Sherwinter et al [15] performed unilateral inguinal hernia repairs with the NOTES technique needed an average of 89 minutes (range 45-150).…”

Early postoperative changes in hematological, erythrocyte aggregation and blood coagulation parameters after unilateral implantation of polytetrafluoroethylene vascular graft in the femoral artery of beagle dogs

“…Canine models may provide important information for vascular surgery research [18][19][20][21][22][23][24][25] . Kuzuya et al 22 investigated the healing process of ePTFE vascular access grafts (internal diameter: 5 mm, length: 15 cm) with various intermodal distances.…”

Anatomical and functional evaluation of tympanoplasty using a transitory natural latex biomembrane implant from the rubber tree Hevea brasiliensis

“…A natural biomembrane prepared with latex extracted from the rubber tree Hevea brasiliensis and polymerized with 0.1% polylysine was developed by the Department of Biochemistry of the Faculty of Medicine, of Ribeirao Preto, University of Sao Paulo. The membrane was used experimentally as a cicatrization-inducing material on the injured esophageal walls of dogs and was shown to lead to a marked increase in vascularization and epithelialization 3,4 . When similar material was used clinically it led to a significant increase in the granulation tissue of phlebopathic ulcers in the legs of patients and to a concomitant reduction of pain during treatment 5,6 .…”