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【Objective】 To introduce the learning experience of holmium laser enucleation of prostate (HoLEP) in the treatment of benign prostatic hyperplasia (BPH) in county-level hospitals. 【Methods】 The clinical data of 500 cases of BPH treated with HoLEP during May 2018 and Dec.2022 were retrospectively analyzed. The learning curve was divided into three stages: learning, maturity and proficiency stages. In each stage, the operation time, postoperative bladder irrigation time and rate of urinary incontinence of 20 patients were analyzed. 【Results】 All operations were performed by the same surgeon. During the learning stage, the operation time and bladder irrigation time were significantly longer, and the rate of urinary incontinence was significantly higher. At the proficiency stage, the operation time, bladder irrigation time, and rate of urinary incontinence were significantly improved. 【Conclusion】 HoLEP technique needs to be developed step by step with a certain learning curve. Continuous learning and mastery of key technical points are necessary for surgeons in county-level hospitals to avoid postoperative urinary incontinence.
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Objective:To investigate the influence of age on the fresh cycle live birth rate in patients with poor ovarian response in different controlled ovarian hyperstimulation groups.Methods:The clinical data of 3 342 patients in The First Affiliated Hospital of Zhengzhou University from February 2014 to November 2018 were retrospectively collected, including early-follicular phase long-acting gonadotropin-releasing hormone (GnRH) agonist long protocol group (1 375 cases), mid-luteal phase short-acting GnRH agonist long protocol group (1 161 cases) and GnRH antagonist protocol group (806 cases); each group was divided into 4 subgroups according to age: ≤30 years, 31－35 years, 36－40 years and >40 years, the pregnancy outcomes in each age subgroup were analyzed under different controlled ovarian hyperstimulation protocols.Results:In early-follicular phase long-acting GnRH agonist long protocol group, the final live birth rates of each age subgroup were 39.4% (228/579), 36.1% (135/374), 16.6% (48/290) and 3.0% (4/132); in mid-luteal phase short-acting GnRH agonist long protocol group, live birth rates of each age subgroup were 32.1% (99/308), 20.8% (55/264), 13.0% (45/346) and 7.0% (17/243); in GnRH antagonist protocol group, live birth rates of each age subgroup were 22.8% (26/114), 16.3% (25/153), 11.2% (31/278), and 3.8% (10/261); the live birth rate of each group decreased significantly with the increase of age (all P<0.01). When the age≤35 years old, the fresh cycle live birth rate of the early-follicular phase long-acting GnRH agonist long protocol group was significantly better than those of the other two groups (all P<0.01). The multivariate logistic regression analysis of age and live birth rate of the three controlled ovarian hyperstimulation groups showed age was the independent influence factor ( OR=0.898, 95% CI: 0.873-0.916, P<0.01; OR=0.926, 95% CI: 0.890-0.996, P<0.01; OR=0.901, 95% CI: 0.863-0.960, P<0.01). Conclusions:Age is an independent influencing factor for the prediction of fresh cycle live birth rate in low ovarian response patients. No matter which controlled ovarian hyperstimulation protocol is adopted, the final live birth rate decreases significantly with the increase of women′s age. In addition, the early-follicular phase long-acting GnRH agonist long protocol has the highest fresh cycle live birth rate among all controlled ovarian hyperstimulation groups.
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Quantitative susceptibility mapping (QSM) can provide tissue susceptibility information and has been adapted for clinical research and diagnosis. QSM of monkey brain at 9.4 T has not been demonstrated so far. In this study 9.4 T monkey brain QSM was performed with 200 μm isotropic high-resolution. It was found that the inherent singularity problem for QSM diverged significantly at ultra-high image resolution during regularization process and resulted in severe image artifacts. The K-space division (TKD) was applied to eliminate the artifacts, with an optimal threshold level between 0.2 and 0.3. High resolution QSM of monkey brain can thus provide a novel tool for brain research.
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Animals , Algorithms , Brain , Diagnostic Imaging , Brain Mapping , Haplorhini , Magnetic Resonance ImagingABSTRACT
For rat spinal magnetic resonance imaging (MRI) experiments, due to the lower main magnetic field strength, shallower detected depth and poor spatial compatibility of the traditional radio frequency (RF) coil, the image signal-to-noise ratio (SNR) of rat spinal was rather lower. In this paper, a RF coil for rat spinal MRI at 9.4 T was developed to improve the image quality and at the same time to avoid the space limitation while scanning in special conditions (cardiac catheterization, etc.). In this article, open birdcage structure was built and magnetic field distribution was calculated. The phantom and rat spine MRI imaging were experimented at 9.4 T to verify the advantage of the coil in rat spine MRI application.
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This paper introduces the preliminary design and practice of the dynamic combination of flipped classroom with traditional classroom in the teaching of pharmaceutical analysis experiment. In the study, the teaching structure sequence of "Low-High-Low" was used. Specifically, before the class, the students conducted a low-structure autonomous learning for cognition and exploration with the intra-campus and public online resources and the traditional teaching resources. In the class, the students conducted a high-structure teacher-assisted learning using the module of "Presentation-Discussion-Experimental Operation-Rediscussion". After class , the students conducted a low-structure autonomous learning for summary and expansion with the various resources. Finally, the teacher integrally assessed students' scores and redesigned the course teaching. The results showed that, compared with traditional classroom, the dynamic combination of flipped classroom with traditional classroom accelerated the improvement of students' abilities in cognition, exploration, practice, and innovation, and also accelerated the transformation of the teachers into teaching researchers and innovators.
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In this study, the induction of hairy roots of Bupleurum chinense DC. was explored and established after experiments at different conditions: A. rhizogenes A4 was used to infect the leaves bases of B. chinense tube seedlings. The explants were co-cultured on Phytagel-solidified media for 3 days and then, were turned into solid media, similar with the co-culture media except that bacteriostat was added. After 10 days, rootlets began to appear and after 4 to 5 weeks, rootlets can be converted into liquid shaking culture stage. Plants regeneration from hairy root was useful for the research of new germplasm production and the variety improvement breeding. In the present study, the regenerated plants were obtained. One approach was to continuously culture under light conditions the seedlings which parting off spontaneously from the hairy roots during liquid shaking culture. The other approach was to culture the callus-like tissues produced by hairy roots with the optimized regeneration media for the induction of regenerated plants. The results of present study provide a technique to induce hairy roots and plantlet regeneration of B. chinense and this technique is helpful for the researches on metabolism, especially on the Agrobacterium-mediated genetic transformation of B. chinense.
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To examine the changes in matrix metalloproteinase-2 (MMP-2) and -9 (MMP-9) in the development and progression of endometriosis, real time quantitative polymerase chain reaction, enzyme-linked immunoabsorbent assay and gelatin zymography were employed to determine the mRNA and protein levels and activities of MMP-2 and MMP-9 from the first day to the 21(st) day after the induction in mice with induced endometriosis (experimental group) and sham-operated animals (controls). The results showed that the mRNA and protein levels and activities of the MMP-2 and MMP-9 were significantly increased on the first day after the induction and the level of MMP-2 stayed at a level higher than that in the control group. MMP-9 had two or three peaks during the 21 days, taking place at day 1, 4 and 15. It is concluded that the changes in the MMP-2 and MMP-9 might be involved in pathogenesis of endometriosis.
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Objective To inquive into 125I seeds interstitial brachytherapy on the malignant tumor in digestive tract.Methods Analyse retrospectively 104 patients with different malignant tumor of stage Ⅱ and stage Ⅲ in digestive tract.All patients received radical resection.125I intraoperative implantation to tumor bed and regional lymph nodes.Complete bland count was determined during postoperative 5-7 days and immuoassay,and X-ray film were taken to observe the distribution of 125I seeds,understand tumor recurs or shifie the situation.Results All patients are followed up a case by regular,Don't have death.Among them one of interstitial Lou happens 8 patients WBC count decreased to 3×109/L within one week and rose to 4×109/L after suit the remedy to the case.Immunity ralve was below normal survive patient apper serious complication that lead to the fact because plant into 125I seeds follow up a case by regular visits to.while being other.Conclusion 125I seeds interstitial beraehytherapy for the malignant tumor of stage Ⅱ and stage Ⅲ in digestive tract is simple,safe and effective especially good application prospects in basic wint.