PubMed · 6783841
The source did not provide an abstract. Follow the original record for more information.
Explore connections, maps & timelines
E Ernst. 1981-03-06. [Hyperviscosity syndrome].. https://pubmed.ncbi.nlm.nih.gov/6783841/
Cite the original work for its findings. Save a collection to share your selection of sources.
KEEP EXPLORING
A simple method to coat human red blood cells (RBC) with PEG is described. Using a reactive derivative, monomethoxy-PEG (mPEG) was covalently attached to the surface of RBC in aqueous media under mild conditions. The PEG coating dramatically reduced aggregation and low shear viscosity of RBC resuspended in autologous plasma, and inhibited RBC agglutination by blood group-specific antibodies. Morphology and deformability of the PEG-treated cells were unaltered. The PEG coating of the RBC surface may be of significant benefit in the treatment of a variety of diseases characterized by vasoocclusion or impaired blood flow, e.g., myocardial infarction, sickle cell disease.
Pulmonary hypertension comprises a family of disorders occurring as a primary disease or as a complication of a large number of respiratory and cardiac diseases. Pulmonary hypertension is present when pulmonary artery pressure or mean pressure exceeds 30 mmHg or 20 mmHg, respectively. Underlying the hemodynamic changes that result in pulmonary hypertension, whether from hypoxia, acidosis, increased pulmonary blood flow, increased shear stress, or idiopathic causes, is a dysfunctional vascular endothelium. In this review, the role of the history and physical examination in the initial assessment is emphasized. Newer diagnostic modalities, such as subselective pulmonary angiography and ultrafast computed tomography scanning, are reviewed. Low-flow oxygen, anticoagulation, and calcium-channel blockade are presented as accepted therapeutic modalities. Inhaled nitric oxide and prostacyclin infusion are presented as newer therapies that may be useful given the limited availability of donor organs for hear-lung transplantation. Future therapeutic strategies are likely to develop from advances in vascular biology.
Red blood cell Agglutinates can be dissociated by providing enough energy which may be supplied by shear stress in a viscometer. In this paper a new technique is proposed to determine dissociation parameters of erythrocyte immunological agglutinates by using a laser backscattering method. Backscattered light intensity increases during the process of agglutinate dissociation when a controlled shear stress in a transparent Couette viscometer is applied. The obtained curves of dissociation can be fitted by an exponential function. A numerical integration of the dissociation curves allows us to obtain a parameter associated to the energy used in the dissociation process. A satisfactory differentiation of erythrocyte sub-groups Al, Az, A,B and Am has been carried out using this technique.