title: The use of autologous 111In-labelled platelets and scintigraphy to illustrate enhanced platelet activity during erection in the chacma baboon.
abstract: The demonstration of thrombelastographic hypercoagulability in the penile blood during erection, and the accompanying deposition of fibrin onto the endothelial layer of the deep penile artery and trabecular surface inspired this investigation of the possible role that platelets might play in the process. The bloodpooling pattern in the penis during and after erection from electro-stimulation was studied in 9 male adult baboons (Papio ursinus) using in vivo 99mTc-labelled red blood cells and scintigraphy. Platelet activity was similarly investigated after administering autologous 111In-labelled platelets to the baboons. The results indicate an enhanced platelet concentration with respect to bloodpooling during erection, and an entrapment of platelets after erection.
mesh_terms: D000818:Animals; D001792:Blood Platelets / Q000502:physiology*; D007204:Indium; D008297:Male; D010215:Papio; D010413:Penis / Q000098:blood supply* / Q000000981:diagnostic imaging; D011868:Radioisotopes; D011877:Radionuclide Imaging; D012726:Sexual Behavior, Animal / Q000502:physiology*
chemical_list: D011868:Radioisotopes; D007204:Indium