Arterial blood supply of the testicle in pigs / Vascularização arterial do testículo de suínos

ABSTRACT

The arterial blood supply of 30 pairs of swines testicles were studied. The animals 6 to 10 months old were obtained from the Campus Administrativo de Pirassununga, Faculdade de Medicina Veterinária e Zootecnia - USP and from Seara Industrial de Xanxerê S/A - Santa Catarina. The testicular artery was injected with vinyl in order to obtain arterial models. In 50% of the preparations the testicular artery showed a variable number of lateral and medial branches; in 31.7% there was predominance of lateral branches. On the remaining 18.3% it was observed predominance of the medial branches. In 43.3% the testicular artery originated two branches, a lateral and a medial. In 30.0% of the preparations there was predominance of the medial branch, while the lateral one predominated on 13.3%. On the remaining 6.7% of the organs the testicular artery gave a dorsal branch and a ventral branch, the later prevailing on the vascularization of the organ. Concerning to the number and distribution of the arterial penetrant vessels, as analysed by the median method, it was possible to observe little differences among quadrants on the various models studied. When the testicular artery originated a variable number of lateral and medial branches (50%), it was possible to observe the presence of penetrant vessels that starting from the branching point reach oposite quadrants to the principal destin

RESUMO

Utilizando 30 pares de testículos de suínos, com idade compreendida entre 6 a 10 meses, procedentes do Campus Administrativo de Pirassununga, da Universidade de São Paulo e da Seara Industrial dc Xanxerê S.A., Santa Catarina, estudou-se a vascularização arterial mediante análise de moldes da artéria testicular, obtidos pela injeção de vynil. Na vascularização do órgão, a artéria testicular forneceu (a) em 50,0% das preparações, número variável de ramos laterais e mediais, ocorrendo em 31,7%, predominância dos ramos laterais; (b) em 43,3% um ramo medial e outro lateral, havendo em 30% das peças, predomínio do ramo medial; (c) em 6,7% dos moldes, os ramos ventral e dorsal, notando-se predomínio do ramo ventral, na vascularização do órgão. Nas preparações em que a artéria testicular fornecia número variável de ramos laterais e mediais, observou-se em mediana e nos quadrantes dorsolateral, dorsomedial, ventrolateral e ventromedial, respectivamente, 27,0; 26,0; 38,0; 28,0 vasos penetrantes quanto da predominância dos laterais e 24,0; 24,0; 30,0 e 33,0 no caso do predomínio dos mediais. Quando a artéria testicular cedeu dois ramos, o medial e o lateral, os valores foram, respectivamcntc, 25,0; 24,0; 35,0; 28,0 com predominância do medial e de 33,0; 33,5; 38,0; 37,5 com predominância do lateral. Quando emitiu os ramos dorsal e ventral, verificou-se, respectivamente 30,5; 24,5; 26,5 e