Artificial cells, blood substitutes, and immobilization biotechnology
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Artif Cells Blood Substit Immobil Biotechnol · Feb 2012
Fluid resuscitation of hemorrhagic shock with hemoglobin vesicles in Beagle dogs: pilot study.
Resuscitation of hemorrhagic shock requires volume replacement and restoration of oxygen metabolism. Artificial oxygen carriers that can both expand blood volume and deliver oxygen have been developed as resuscitation fluids. We employed hemoglobin vesicles (HbV), a cellular-type artificial oxygen carrier, in a Beagle dog hemorrhagic shock model to prove the efficacy of HbV. ⋯ Serum chemistry data from the HbV group were unremarkable. HbV contributed 32% of the post-resuscitation oxygen delivery. Collectively, HbV is comparable to ASB and HSA as a resuscitation fluid and is an effective oxygen carrier.
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Artif Cells Blood Substit Immobil Biotechnol · Aug 2011
Dose response of sodium nitrite on vasoactivity associated with HBOC-201 in a swine model of controlled hemorrhage.
Sodium nitrite (NaNO(2)) was evaluated in a 55% EBV hemorrhage swine model to mitigate the increased blood pressure due to HBOC-201. Animals were resuscitated by three 10 ml/kg infusions of either HBOC-201 or Hextend with and without NaNO(2). All vital signs, coagulation and blood chemistry were measured for 2 hr. ⋯ Complete abolition was obtained with the highest 3 NaNO(2) dose, but side effects were observed. There was no reduction in platelet function due to NaNO(2). NaNO(2) ability to reduce HBOC-201 vasoactivity was transient and 10.8 μmol/kg NaNO(2) seems an acceptable dose for further investigation.
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Artif Cells Blood Substit Immobil Biotechnol · Apr 2011
ReviewFilling materials used in kyphoplasty and vertebroplasty for vertebral compression fracture: a literature review.
Kyphoplasty (KP) and vertebroplasty (VP) are both minimally invasive surgical techniques, which can enhance the mechanical stability of the vertebral lesion by injecting filling materials into the fractured vertebra. The filling materials used in KP and VP include injectable PMMA, composite bone cement, biodegradable bone cement, calcium phosphate cement (CPC), and others. Different filling materials have different effects on the biomechanical properties of vertebral bodies, causing various biomechanical effects on the adjacent vertebral bodies. In conclusion, the development of filling materials can improve the anti-pressure capacity and effectively maintain good morphological characteristics of fractured vertebral bodies.
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Artif Cells Blood Substit Immobil Biotechnol · Apr 2011
Hemoglobin-based oxygen carrier (HBOC-201) and escalating doses of recombinant factor VIIa (rFVIIa) as a novel pre-hospital resuscitation fluid in a swine model of severe uncontrolled hemorrhage.
Exsanguinating hemorrhage and unavailability of blood are major problems in pre-hospital trauma care. We investigated if combining rFVIIa with HBOC-201 reduces blood loss and improves physiologic parameters compared to HBOC alone. ⋯ Lactate was cleared faster in the HBOC+rFVIIa 90 μg/kg group. Verification in a large, well-powered study is indicated.
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Artif Cells Blood Substit Immobil Biotechnol · Jan 2010
ReviewAdvances in small gap sleeve bridging peripheral nerve injury.
Abstract: Nerve regeneration and re-innervation are usually difficult after peripheral nerve injury. Epineurium neurorrhaphy to recover the nerve continuity was the traditional choice of peripheral nerve mutilation without nerve defects, whereas the functional recovery was not quite satisfactory. In this article, the authors review the literature focused on peripheral nerve injury research and possible clinical application, including introducing peripheral nerve selective regeneration theory, small gap sleeve bridging nerve methodepineurium neurorrhaphy, kinds of biological conduit, and microenvironment research between nerve stumps.