Evaluation of microporous polysaccharide hemospheres as a novel hemostatic agent in open partial nephrectomy: favorable experimental results in the porcine model.
OBJECTIVE
Microporous polysaccharide hemospheres (MPH, Medafor, Minneapolis, Minneapolis) are a novel hemostatic agent made from purified plant starch. MPH activates the clotting cascade and hyperconcentrates platelets and coagulation proteins, while enhancing a hemostatic plug. We evaluated the hemostatic efficacy of MPH compared with standard surgical technique in a porcine open partial nephrectomy model.


METHODS
Standardized lower pole partial nephrectomy was consecutively performed in each kidney of 12 female pigs. Each pig was randomized to 2 groups, namely treatment with MPH application or control with the conventional surgical technique (oxidized cellulose with bolster sutures). The right kidney was harvested 1 half-hour after hemostasis was achieved and the left kidney was harvested after 7 days.


RESULTS
Mean animal and resected renal tissue weight were comparable. Ischemic and hemostasis times were significantly decreased in the MPH treated group (2.67 and 4.67 minutes, respectively) vs the control group (8.33 and 7.75 minutes, respectively) (each p = 0.004). Blood loss was equivocal (0.88 gm in the treatment group vs 2.09 gm in the control group, p = 0.07). No hemostatic complications were noted in either group. No evidence of residual foreign material was found in the MPH group at 1 week.


CONCLUSIONS
MPH provided rapid, effective and durable hemostasis in the porcine open partial nephrectomy model. Additional experimental and clinical evaluation is warranted to define the role of MPH assisted partial nephrectomy in humans.
Department of Urology, Mayo Clinic, 200 First Street SW, Rochester, MN 55905, USA.
Francois-Joseph L
FJ
Murat
Mark H
MH
Ereth
Yue
Y
Dong
Mark P
MP
Piedra
Matthew T
MT
Gettman
D000818:Animals; D001777:Blood Coagulation; D016063:Blood Loss, Surgical; D005260:Female; D006488:Hemostasis, Surgical; D006490:Hemostatics / Q000008:administration & dosage; D008863:Microspheres; D009392:Nephrectomy; D011134:Polysaccharides / Q000008:administration & dosage; D016062:Porosity; D011208:Powders; D013552:Swine
D006490:Hemostatics; D011134:Polysaccharides; D011208:Powders