ABSTRACT
Objective :To study evaluation value of echocardiography for right ventricular function in patients with pulmonary embolism (PE) and analyze the influencing factors of risk stratification .Methods :A total of 130 PE ca-ses treated in our hospital from Feb 2016 to Aug 2017 were selected .All patients received risk stratification ,inclu-ding 48 high risk cases (high risk group) and 82 low-medium risk cases (low-medium risk group).Another 60 healthy subjects undergoing physical examination were regarded as healthy control group during the same period .All subjects received two-dimensional echocardiography and tissue Doppler imaging .PAD ,PASP ,right ventricular Tei index , RVEDV ,RVSV ,RVEF and RVESV were measured and compared among all groups .Multi-factor Logistic regres-sion analysis was used to analyze independent risk factors of PE risk stratification .Results : Compared with normal control group and low-medium risk group ,there were significant rise in PAD [ (22.02 ± 1.33) mm vs .(24.42 ± 2.02) mm vs.(36.31 ± 2.12) mm] ,PASP [(22.28 ± 2.71) mmHg vs.(32.42 ± 4.83) mmHg vs.(84.57 ± 21.01) mmHg] ,right ventricular Tei index [(0.30 ± 0.04) vs.(0.40 ± 0.06) vs.(0.66 ± 0.05)] ,RVEDV [(68.08 ± 4.71) ml vs.(75.55 ± 7.88) ml vs.(123.29 ± 7.14) ml] and RVESV [ (29.33 ± 3.46) ml vs.(43.12 ± 6.11) ml vs. (87.01 ± 9.94) ml] ,and significant reductions in RVSV [ (37.79 ± 3.82) ml vs .(35.34 ± 1.89) ml vs .(33.12 ± 3.28) ml] and RVEF [(56.93 ± 3.00)% vs.(45.37 ± 4.88)% vs.(25.48 ± 4.92)% ] in high risk group ;and PAD , PASP ,right ventricular Tei index ,RVEDV and RVESV of low-medium risk group were significantly higher than those of normal control group ,and RVSV and RVEF of low-medium risk group were significantly lower than those of normal control group , P＝0. 001 all.Multi-factor Logistic regression indicated that PASP ,right ventricular Tei index and RVESV were independent risk factors for PE risk stratification (OR＝ 1.789～5.602 , P＜ 0.05 or ＜0.01).Conclusion :Echocardiography is of high clinical value in the evaluation of right ventricular function in PE , PASP ,right ventricular Tei index and RVESV can be used for risk stratification .
ABSTRACT
Objective To investigate the efficacy of the bioactive artificial vertebrae of a nano- hydroapatite crystals and polyamide 66 composite(n-HA/PA66)to restore the height and architecture of thoracolumbar burst fracture.Methods From December 2003 to February 2006,38 patients(29 males and 9 females)with a mean age of 35.6 years(17-63 years)were treated surgically through anterior ap- proach for decompression and implanted with the bioactive artificial vertebrae of n-HA/PA66 composite to reconstruct the structure of the thoracolumbar burst fractured vertebra.Results All the patients were successfuly followed-up for an average of 8 months,ranging from 6 to 21 months.The bioaetive artificial vertebrac of n-HA/PA66 composite were fused with the receptor bone 3-4 months after operation.The neu- rological function of the patients was restored partially or completely.The thoracolumbar spine was stable during physical examination and the height of thoraeolumbar burst fractured vertebrae that had been restored did not changa during the follow-up.Conclusions Our results show the bioaetive artificial vertebrae of n-HA/PA66 can restore the height and structure of thoracolumbar burst fractured vertebrae and reconstruct the structure of the tboraeolumbar vertebrae effectively,indicating that the bioaetive artificial vertebrae of n- HA/PA66 can be used extensively in clinical spinal surgery.