[Effect of multiple paralleled acupuncture needles stimulation of scalp points on hemodynamics and blood flow energy of the common carotid artery in stroke patients].

OBJECTIVE: To observe the changes of carotid hemodynamic and hydraulic power indices after paralleled scalp-point acupuncture therapy in post-stroke patients. METHODS: Twenty post-stroke volunteer patients were enlisted in the present study. Aseptic filiform needles were inserted into Baihui (GV 20), bilateral Motor Area (MS 8), etc. with the needles retained for 5 min. The treatment was given one time. Hemodynamic indices: mean velocity of blood flow (Vmean), maximum velocity (Vmax), minimum velocity (Vmin), mean blood flow (Qmean), maximum blood flow (Qmax), minimum blood flow (Qmin), natural impedance (Zc), peripheral resistance (Rc), dynamic resistance (Dr), and critical pressure (Pc) before and after the treatment were detected with KF-3000 Brain Circulation Analyzer. The hydraulic power indices:stable potential energy (Ws), oscillation potential energy (Wo), total potential energy (Wc), stable kinetic energy (Ks), success kinetic energy (Ko), total kinetic energy (Kc), stable total energy (Ts), oscillation total energy (To), total energy (Tc), To/Tc, Kc/Tc, Wo/Wc and Ks/Kc were obtained through calculation. RESULTS: After the therapy, Vmin, Vmean, Qmin and Qmean increased significantly (P<0.001), while Rc decreased evidently (P<0.001). Ws, Ks, Ts, Wc, Kc, Tc and Kc/Tc increased obviously (P<0.001, P<0.05), and Ks/Kc declined significantly (P<0.01). The rest indices had no significant changes after the treatment. CONCLUSION: Multiple paralleled scalp acupuncture needles stimulation can effectively raise the blood flow volume of the common caroitid artery, leading to an increase of the energy supply of the cerebral blood circulation, but has no apparent influence on the total oscillatory energy/total energy in stroke patients.

[Formation and hemodynamics of pseudoaneurysm after rupture and bleeding of aneurysm: an experiment with dogs].

OBJECTIVE: To study the process and mechanism of the formation of pseudoaneurysm after the rupture of aneurysm. METHODS: A model of aneurysm (AN) of the left common carotid artery (CCA) was made in 20 dogs. One to 2 weeks after the formation of AN, a localized hematoma connected with the AN was formed as a model of pseudoaneurysm after the rupture of true aneurysm (false aneurysm caused by the ruptured true aneurysm, T + F) was established. The models were examined by using color Doppler, magnetic resonance imaging (MRI), magnetic resonance angiography (MRA), and digital subtraction angiographies (DSA) 1, 2, 3, 4, and 8 weeks after the operation in all the animals. By the end of experiment the models of AN were taken out to undergo pathological examination by light and electron microscopy. The blood flow velocity, pressure on the walls and shear stress in the true and false aneurysm were analyzed by simulation of computational fluid dynamics (CFD) on these animal models. RESULTS: Experimental models of T + F were successfully created in the 11 dogs. CCA was successfully occluded in 3 dogs, true aneurysm was occluded in 2, and true aneurysms without pseudoaneurysm were produced in 4. The blood flow in the pseudoaneurysm was very slow. The pressure and shear stress were very high in the ends distal to the aneurysms and not high around the boundary between the true and false aneurysms. CONCLUSION: The formation and growth of pseudoaneurysm are probably correlated with the pressure within the vessels. T + F should be positively and definitely treated by surgery to prevent them from rupture and bleeding.