Changes in hepatic hemodynamics after orthotopic liver transplantation : a research of color Doppler ultrasonography / 中华超声影像学杂志

Objective To analyze the hemodynamic changes with color Doppler flow imaging(CDFI) after liver transplantation. Methods One hundred fifty-six patients with transplanted livers were included. Hepatic morphology and parenehyma was investigated with B-mode ultrasound, and the patency of hepatic anastomosis was assessed with CDFI. Hemodynamic parameters were also measured. Results It showed increased parenchyma echogenicity during the early period after liver transplantation. Hepatic hemodynamies changed as follows: peak systolic velocity of portal vein was high in the first day after operation, and then it progressively decreased; the peak systolic velocity of hepatic artery was not changed during the follow-up period;the resistance index of hepatic artery was a little higher in the first day after liver transplantation, then it decreased ( P<0.05 ). Conclusions CDFI is valuable in evaluating hepatic hemodynamic changes after liver transplantation.

Study on changes of middle cerebral arterial hemodynamics before and after intraluminal stent-assisted angioplasty in patients with their stenosis by color Doppler ultrasonography / 中华超声影像学杂志

Objective To evaluate the changes of middle cerebral arterial (MCA) hemodynamics before and after intraluminal stent-assisted angioplasty for their stenosis. Methods A total of 11 patients with MCA stenosis treated by intraluminal stent-assisted angioplasty were selected. In these cases, their stenosis before treatment and the state of stents after treatment were observed using transcranial color Doppler ultrasonography(TCCD). Meanwhile, the blood flow velocities (including peak systolic velocity, end diastolic velocity and mean velocity) were measured and studied comparatively at stenosis and post-stenosis place before and after the treatment, respectively. Results ①Among 11 cases implanted stents, 10 stents were in good state after treatment, only one expanded incompletely. ②The blood flow velocities were significantly higher in patients at stenosis place than in normal adults, and lower at post-stenosis place before treatment (P<0.05). The blood flow velocity lowered obviously at stenosis place after treatment (P<0.05) ,among which 90.9% were restored. The one which expanded incompletely was slightly higher. The blood flow velocity increased at post-stenosis place after treatment (P<0.05) and all returned to normal.Conclusions TCCD can observe the MCA stenosis and the state of stent,and analyze the changes of their hemodynamics.

Changes of plasma ANP and BNP in plasma before and after percutanous balloon mitral valvuloplasty / 中国介入心脏病学杂志

Objective To observe the changes of atrial natriuretic peptide (ANP) and brain natriuretic peptide (BNP) in plasma and the correlation of ANP and BNP with hemodynamic parameters in patients with sinus rhythm or atrial fibrillation after percutanous balloon mitral valvuloplasty (PBMV). Methods Thirty-six patients with rheumatic mitral stenosis undergoing first time successful PBMV were enrolled in the study. Among a total of 36 patients, 11 were in sinus rhythm (SR group) and 25 had atrial fibrillation (Af group). The levels of ANP and BNP were assayed before and at 1 day and 3 days after the procedure. Hemodynamic parameters were measured by echocardiography and left atrial pressure (LAP) and pulmonary artery pressure (PAP) were assessed instantly by cardiac catheter before and after PBMV. Results After PBMV,the ANP levels gradually decreased (216.09?73.84 pg/mL; 188.70?59.22 pg/mL; 140.70?41.53 pg/mL, respectively, before, at one day and three days after procedure, P

Doppler studies of maternal uterine artery and fetal circulation in women with early-onset of severe preeclampsia / 中华围产医学杂志

Objective To observe the hemodynamic variations of both the mother and fetus when the pregnancy was complicated with early-onset of severe preeclampsia, and to evaluate the role of monitoring the blood flow with Doppler in the management and prognostic value in the same condition. Methods A prospective case-control study was conducted in 36 pregnant women admitted for early-onset of severe preeclampsia (S-PE). The control group included 72 healthy pregnant women matched with the S-PE group. All had color Doppler sonography monitored during this study period. Data were collected for the umbilical artery (UA) pulsatility index (PI) and systolic/diastolic ratio (S/D) , the middle cerebral artery (MCA) PI and S/D and the maternal mean uterine artery (UtA) PI and S/D. Those subjects with adverse perinatal outcomes were followed up after birth. Results The mean Doppler indices(S/D and PI) of fetal UA, MCA and maternal UtA were all declined gradually with the advancing gestational ages in both groups. The values of UA-S/D, UA-PI, UtA-S/D, and UtA-PI in the early-onset S-PE group were significantly higher than those of the control(P

Effects of dopamine alone or dopamine plus norepinephrine on hemodynamics, tissue oxygenation and renal function during orthotopic liver transplantation / 中华麻醉学杂志

Objective To evaluate the effects of dopamine (DA) alone or DA plus norepinephrine (NE) on hemodynamics, tissue oxygenation, acid-base balance and renal function during orthotopic liver transplantation (OLT).Methods Thirty ASA IE or IV patients undergoing OLT were randomly divided into 2 groups of 15 patients each. In group A DA was continuously infused during operation. The initial infusion rate was 1-3 ?g?kg-1 ?min-1 . The rate was then adjusted to MAP between 60-80 mmHg. While in group B DA and NE were continuously infused. The initial infusion rate of DA was 1-3 (?g?kg-1?min-1 and that of NE 0.03 ?g?kg-1?min-1 . Both rates were adjusted to MAP between 60-80 mm Hg but the maximal DA infusion rate was 5 ?g?kg-1?min-1 . Anesthesia was induced with midazolam, propofol, fentanyl and vecuronium and maintained with isoflurane inhalation, continuous propofol infusion and intermittent i.v. boluses of fentanyl, midazolam and pipecuronium. Radial artery was cannulated and S-G catheter was placed via right internal jugular vein. Hemodynamic variables such as MAP, CVP, PAP, PCWP, SVRI, PVRI, blood gases, mixed venous blood O2 saturation (SvO2), blood lactate, Cr and BUN were measured and O2 delivery (DO2 ) and O2 consumption (VO2 ) were calculated and recorded after induction and before surgery (T1 baseline), 60 min after operation was started (T2), at 60 min anhepatic phase (T3) and 60 min neohepatic phase (T4 ) and at the end of operation ( T5). Results There were no significant differences between the two groups with respect to age, sex, body weight, duration of operation and types of surgery. MAP and HR were quite stable in both groups. CVP, MPAP, PCWP, cardiac output (CO) and CI were significantly decreased while SVR and SVRI were increased during anhepatic phase (T3 ) in both groups ( P