RESUMEN
Stress-resistant barrows were randomly assigned to groups of 15: I, control; II, hemorrhage 24 h before antemortem treatment; III, iv infusion of .45% NaCl 30 min before antemortem treatment; IV, iv infusion of 6% dextran (molecular weight 70,000) in saline 1 h before antemortem treatment and V, water deprivation for 48 h before antemortem treatment. Five barrows each within groups I through V were randomly assigned to three antemortem treatments: A, iv infusion 50% MgSO4 anesthesia; B, a forced walk of 100 m and electrical stunning (80 V for 20 s) and C, a forced walk, 5 min restraint with the use of a snare and electrical stunning. Postmortem muscle glycolysis was not affected by modification of fluid volumes before MgSO4 anesthesia or alteration of red-blood-cell mass in pigs exsanguinated under stress. However, an increase in fluid volume of the extravascular space accelerated postmortem glycolysis in pigs exsanguinated under stress. Thus, level of free water in muscle at exsanguination may control postmortem metabolism regardless of other antemortem extra- and intramuscular factors.
Asunto(s)
Volumen de Eritrocitos , Espacio Extracelular/fisiología , Carne , Músculos/metabolismo , Estrés Fisiológico/veterinaria , Porcinos/fisiología , Animales , Hemorragia/metabolismo , Hemorragia/fisiopatología , Hemorragia/veterinaria , Masculino , Orquiectomía , Estrés Fisiológico/sangre , Estrés Fisiológico/metabolismo , Estrés Fisiológico/fisiopatología , Enfermedades de los Porcinos/sangre , Enfermedades de los Porcinos/metabolismo , Enfermedades de los Porcinos/fisiopatologíaRESUMEN
Measurements of hematocrit, total plasma protein and red cell volume were made during sexual excitement and copulation in boars. Red cell volume (RCV) was determined by isotope dilution technique using endogenous 51Cr-tagged red cells. Basing on these data changes in the total blood volume (TBV) and plasma volume (PV) were calculated by 2 indirect methods. RCV increased by 12% to 16% in the intial phase of ejaculation and remained increased during ejaculation and 40 minutes after copulation. TBV and PV decreased during copulation, greatest drop being found in the final phase of ejaculation. After ejaculation the TBV was increasing, first to the resting value before copulation (about 20 minutes after copulation), thereafter it became markedly higher than during the resting period. Depending on the method used for calculation significant differences were found in the quantity of TBV and PV drop during ejaculation.