• 제목/요약/키워드: Blood Circulation

검색결과 782건 처리시간 0.025초

심혈관계의 노화현상에 대한 혈류역학적 시뮬레이션 (Hemodynamic simulation of the aging effect on the cardiovascular system)

  • 변수영;손정락;심은보;노승탁
    • 대한기계학회:학술대회논문집
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    • 대한기계학회 2002년도 학술대회지
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    • pp.713-716
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    • 2002

  • Aging effect on the cardiovascular circulation is simulated by lumped parameter model. Aging phenomena can be hemodynamically explained as (1) the increase of flow resistance induced by remodeling of artery vessels and increased viscosity of blood and (2) the reduction of the vessel capacitance caused by arteriosclerosis. Appropriate physiological parameters are evaluated from the clinical data of adults and old men. Simulation results well explain the hypertension with aging of cardiovascular system.

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관상동맥 우회로술 환자에서 혈액 보존법 (Blood Conservation in Coronary Artery Bypass Surgery - in 24 consecutive patients -)

  • 최종범
    • Journal of Chest Surgery
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    • 제25권10호
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    • pp.1048-1054
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    • 1992

  • With use of a simple, inexpensive and nonpharmacological program for blood conservation, 24 consecutive patients underwent elective or urgent coronary artery bypass grafting without need of homologous red cell transfusions and /or fresh frozen plasma transfusions in 16 patients[66.7%]. Left internal mammary artery graftings were done in 18 patients[75%], with supplemental saphenous vein grafts in all. Intraoperatively, autologous heparinized blood was removed before bypass and retransfused at the conclusion of ext-racorporeal circulation. The volume remaining in the oxygenator and tubing set was returned without cell processing or hemofiltration. Using the hard-shell cardiotomy reservoir from the oxygenator, autotransfusion of the shed mediastinal blood was continued hourly by the next early;norning. The mean postoperative mediastinal blood loss was 364$\pm$234ml, whereas 553$\pm$383ml was autotransfused. 4 patients [16.7%] received homologous blood and an additional 4 patients[16.7%] fresh frozen plasma. Thus, in total, 16 patients[66.7%] were not exposed to any homologous blood products during the hospital stay. At discharge, the mean hemoglobin concentration was 10.3$\pm$1.6g /dl. Postoperative complications were few and there was no hospital death.

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