Classification( By hemodynamic characteristics ype CO TPR mBP Clinical(skin) Low Co+ high r pale、cod、 clam High co+LowR↑fush、warm、dry Low co+ Low r cyanosis, icelike-cold R: resistance
Classification（ By hemodynamic characteristics） Low CO + high R ↓ ↑ ↓ pale、cold 、 clamy High CO + Low R ↑ ↓ ↓ flush、warm 、dry Type CO TPR mBP Clinical (skin) Low CO + Low R ↓ ↓ ↓ cyanosis 、icelike-cold R: resistance
Section 2 Microcirculatory changes stages of shock Microcirculatory constriction Microcirculatory stagnancy Microcirculatory failure
Section 2 Microcirculatory changes & stages of shock Microcirculatory constriction Microcirculatory Stagnancy Microcirculatory Failure
Postcapillary resistance back sluice gate shunt venule true capillary Precapillary sphincter N arteriole thoroughfare Precapillary resistance channel front sluice gate postarterial Microcirculation
后微动脉 venule true capillary A-V shunt Precapillary sphincter arteriole postarteriole thoroughfare Precapillary resistance channel Microcirculation （ front sluice gate） Postcapillary resistance （ back sluice gate ）
1. Microcirculatory constriction phase venule H73 precapillary (A) terlovenou normal sphincter true capillary small vein true capillary precapillary MF arteriole sphincter pH7. 4 venule H7.1 precapillary B) (sphincter true capillary shunt smalI vein ischemic true capillary precapillary y anoxia phase H74 Sympathetic-adrenal system activation thoroughfare channel
1. Microcirculatory constriction phase Sympathetic-adrenal system activation thoroughfare channel
(1) Characters of microcirculation ① Precapillary r↑> postcapillary r↑ 2 Many true capillary closing ARteriovenous shunts opening ④ perfusion output↓↓< flow output↓
①Precapillary R ↑↑> postcapillary R ↑ ②Many true capillary closing ③Arteriovenous shunts opening ④perfusion output↓ ↓ < flow output↓ (1) Characters of Microcirculation