title: Low-volume resuscitation with a hemoglobin-based oxygen carrier after hemorrhage improves gut microvascular oxygenation in swine.
abstract: Using palladium-porphyrin quenching of phosphorescence, we investigated the influence of diaspirin cross-linked hemoglobin (DCLHb) on gut microvascular oxygen pressure (microPO2) in anesthetized pigs. Values of gut microPO2 were studied in correlation with regional intestinal as well as global metabolic and circulatory parameters. A controlled hemorrhagic shock (blood withdrawal of 40 mL/kg) was followed by resuscitation with either a combination of lactated Ringer's solution (75 mL/kg) and modified gelatin (15 mL/kg)(lactR/Gel) or 10% DCLHb (5 mL/kg). After resuscitation, gut microPO2 was similarly improved in the lactR/Gel group (from 25 +/- 10 mm Hg to 53 +/- 8 mm Hg) and the DCLHb group (from 23 +/- 9 mm Hg to 46 +/- 6 mm Hg), which was associated with increased gut oxygen delivery. However, the improvement after resuscitation with DCLHb was sustained for longer periods of time (75 vs 30 min). Mesenteric venous PO2 was increased after resuscitation with lactated Ringer's solution and modified gelatin but not with DCLHb, which was associated with an increased gut oxygen consumption in the latter group. We conclude that measurement of microPO2 by the palladium-porphyrin phosphorescence technique revealed DCLHb to be an effective carrier of oxygen to the microcirculation of the gut. Also, this effect can be achieved with a lower volume than is currently used in resuscitation procedures.
authors.affiliation: Department of Anesthesiology, Academic Medical Centre, University of Amsterdam, The Netherlands.
authors.forename: M
authors.initials: M
authors.lastname: van Iterson
authors.forename: M
authors.initials: M
authors.lastname: Sinaasappel
authors.forename: K
authors.initials: K
authors.lastname: Burhop
authors.forename: A
authors.initials: A
authors.lastname: Trouwborst
authors.forename: C
authors.initials: C
authors.lastname: Ince
mesh_terms: D000818:Animals; D001241:Aspirin / Q000031:analogs & derivatives* / Q000627:therapeutic use; D001802:Blood Substitutes / Q000627:therapeutic use*; D004195:Disease Models, Animal; D005260:Female; D006439:Hemodynamics / Q000187:drug effects; D006454:Hemoglobins / Q000627:therapeutic use*; D007082:Ileum / Q000098:blood supply* / Q000187:drug effects; D008833:Microcirculation; D010100:Oxygen / Q000097:blood*; D010101:Oxygen Consumption / Q000502:physiology*; D010313:Partial Pressure; D012151:Resuscitation / Q000379:methods; D012771:Shock, Hemorrhagic / Q000097:blood / Q000628:therapy*; D013552:Swine
chemical_list: D001802:Blood Substitutes; D006454:Hemoglobins; C083478:diaspirin-cross-linked hemoglobin; D001241:Aspirin; D010100:Oxygen