title: Fine-needle percutaneous transhepatic parenchymal portal venography by using carbon dioxide: a pilot study in pigs.
abstract: Our purpose was to evaluate the feasibility and safety of carbon dioxide (CO(2)) in fine-needle percutaneous transhepatic parenchymal portal venography and its potential clinical applications. Three Belgian landrace pigs received fine-needle percutaneous transhepatic parenchymal portal venography by using CO(2) as a contrast agent. Under fluoroscopic and B-mode ultrasonic guidance, right or left lobe of liver was punctured with a 22-G Chiba needle, through which CO(2) was injected with a dedicated CO(2) injector at injection rate of 20 ml/s for 20 ml, 40 ml/s for 40 ml, 40 ml/s for 60 ml, and 40 ml/s for 80 ml, respectively. The portal venograms were obtained by use of digital subtraction angiography (DSA) system with animal in supine position. In one pig transarterial portal venography was performed, in addition, using iodinated contrast agent. The portal vein was visualized in each run of venography. Optimal images of portal tree structure up to four-order branches were obtained in all those with CO(2) injection rate of 40 ml/s, which appeared much better in quality than those obtained by cranial mesenteric arteriography with iodinated contrast agent. No extravasation of CO(2), liver laceration, or any other complication occurred during the procedures. The technique we proposed demonstrated optimal portography, which appeared to be safe, minimally invasive, less time-consuming, cost-effective, and easy to perform, with great potential in clinical applications.
authors.affiliation: Minimally Invasive Surgery Centre, Campus Universitario, Avenida de la Universidad, s/n, 10071 Caceres, Spain. feisun@ccmi.es
authors.forename: Fei
authors.initials: F
authors.lastname: Sun
authors.forename: Javier
authors.initials: J
authors.lastname: Hernández
authors.forename: Verónica
authors.initials: V
authors.lastname: Crisóstomo
authors.forename: Luis-Fernando
authors.initials: LF
authors.lastname: Pineda
authors.forename: Juan Rafael
authors.initials: JR
authors.lastname: Lima
authors.forename: Jesús
authors.initials: J
authors.lastname: Usón
authors.forename: Manuel
authors.initials: M
authors.lastname: Maynar
mesh_terms: D015901:Angiography, Digital Subtraction / Q000295:instrumentation*; D000818:Animals; D002245:Carbon Dioxide; D003287:Contrast Media / Q000008:administration & dosage*; D005240:Feasibility Studies; D007275:Injections, Intravenous / Q000295:instrumentation*; D008099:Liver / Q000098:blood supply*; D009339:Needles; D010690:Phlebography / Q000295:instrumentation*; D010865:Pilot Projects; D011169:Portal Vein / Q000000981:diagnostic imaging*; D011856:Radiographic Image Enhancement; D013552:Swine
chemical_list: D003287:Contrast Media; D002245:Carbon Dioxide