Analysis of coronary rotational atherectomy related complications and prevention / 中国介入心脏病学杂志

Objective To analyze the complications of coronary rotational atherectomy and to evaluate the safety of the procedure. Methods We evaluated the procedural and angiographic outcomes of 248 consecutive procedures to rotational atherectomy between January 2000 and October 2016. Results 27 cases(10.9％)were found to have rotational atherectomy related complications. Among these 27 cases,coronary spasm occurred in 2 cases(0.8％),no reflow in 8 cases(3.2％), coronary dissection in 5 cases(2.0％),burr entrapment in 6 cases(2.4％),wire breakage in 3 cases(1.2％), and coronary perforation in 3 cases(1.2％). There were no death,acute myocardial infarction and emergent coronary bypass graft.14 case(5.6％)had PCI-related myocardial infarction during hospital stay.In-hospital major adverse cardiaccerebral event(MACCE)rate was 5.6％. Conclusions Coronary rotational atherectomy can be performed with high success rates and procedure-related complications are rare.

Feasibility and outcome of rotational atherectomy for treating resistant chronic total occlusions / 中华心血管病杂志

<p><b>OBJECTIVE</b>To assess the application of rotational atherectomy to improving the success rate and outcome of percutaneous recanalization of resistant chronic total occlusion (CTO), i.e. the guidewire could cross the lesion but it is impossible to advance any device over the wire through the occluded segment.</p><p><b>METHODS</b>From August 2008 to December 2012, 26 consecutive patients with 27 resistant CTO lesions were additionally treated by high-speed rotational atherectomy (rotational atherectomy group). The control group included 751 non-resistant CTO lesions. Drug-eluting stents were implanted in two groups after the balloon catheter crossed the CTO lesions. The successful rate of rotational atherectomy and in hospital major adverse cardiovascular events (including cardiac death, interventional treatment related myocardial infarction and target vessel revascularization) were observed.</p><p><b>RESULTS</b>The rate of heavily calcified coronary lesions was significantly higher in rotational atherectomy group than in the control group[63.0% (17/27) vs. 21.2% (159/751), P < 0.05] according to pre-procedural coronary angiography. Rotational atherectomy was successful in 25 out of 27 resistant CTO lesions (92.6 %). The rate of cardiac death [0 vs. 0.5% (4/751), P > 0.05], interventional treatment related myocardial infarction [38.5% (10/26) vs. 22.2% (167/751), P > 0.05] and target vessel revascularization [0 vs. 1.2% (9/751), P > 0.05] were similar between the rotational atherectomy group and the control group.</p><p><b>CONCLUSION</b>Rotational atherectomy is a safe and helpful technique to overcome the inability of balloon catheter to cross a resistant CTO.</p>

A new puncture needle with multiple holes for testicular sperm extraction / 中华男科学杂志

<p><b>OBJECTIVE</b>To evaluate a new puncture needle with multiple holes (National Invention Patent of China: ZL 2010202466554) in testicular sperm extraction for infertile males.</p><p><b>METHODS</b>This study included 215 azoospermia patients, who underwent testicular sperm extraction with a new puncture needle with multiple holes (group A, n = 133), by open biopsy (group B, n = 37), or with a fine needle (group C, n = 45).</p><p><b>RESULTS</b>The first-time success rate was 100% in group A, 19% in B and 100% in C. The average operation time was obviously shorter in group A ([3 +/- 1] min) than in B ([15 +/- 3] min) and C ([7 +/- 2] min). The rate of postoperative complications was 3.0% in group A, significantly lower than in B (21.6%) and C (11.1%).</p><p><b>CONCLUSION</b>The new puncture needle with multiple holes, with its advantages of accuracy, high first-time success rate, minimal invasiveness and low rate of complications, deserves to be generally applied in testicular sperm extraction.</p>

Purification and properties of Bacillus subtilis SA-22 endo-1, 4-beta-D-mannanase / 生物工程学报

beta-mannanase (EC 3.2.1.78) from Bacillus subtilis SA-22 was purified successively by ammonium sulfate precipitation, hydroxyapatite chromatography, Sephadex G-75 gel filtration and DEAE-52 anion-exchange chromatography. Through these steps, the enzyme was concentrated 30.75-fold with a recovery rate of 23.43%, with a specific activity of 34780.56 u/mg. Molecular weight of the enzyme was determined to be 38 kD by SDS-PAGE and 34 kD by gel filtration. The results revealed that the optimal pH value for the enzyme was 6.5 and the optimal temperature was 70 degrees C. The enzyme is stable between pH 5 to 10. The enzyme remained most of its activity after a treatment of 4 h at 50 degrees C, but lost 25% of activity at 60 degrees C for 4 h, lost 50% of activity at 70 degrees C for 3 h. The enzyme activity was strongly inhibited by Hg2+. The Michaelis constants (Km) were measured as 11.30 mg/mL for locust bean gum and 4.76 mg/mL for konjac powder, while Vmax for these two polysaccharides were 188.68 (micromol x mL(-1) x min(-1)) and 114.94 (micromol x mL(-1) x min(-1)), respectively.