A new method to reconstruct 3D scene points from nonparallel stereo is proposed. From a pair of conjugate images in an arbitrarily configured stereo system that has been calibrated, coordinates of 3D scene points can ...A new method to reconstruct 3D scene points from nonparallel stereo is proposed. From a pair of conjugate images in an arbitrarily configured stereo system that has been calibrated, coordinates of 3D scene points can be computed directly using the method, bypassing the process of rectifying images or iterative solution involved in existing methods. Experiment results from both simulated data and real images validate the method. Practical application to surgical navigator shows that the method has advantages to improve efficiency and accuracy of 3D reconstruction from nonparallel stereo system in comparison with the conventional method that employs algorithm for standard parallel axes stereo geometry.展开更多
Data are scarce regarding surgical and non-surgical education in accredited Female Pelvic Medicine and Reconstructive Surgery (FPMRS) fellowships in theUnited States. We compared surgical and non-surgical and educatio...Data are scarce regarding surgical and non-surgical education in accredited Female Pelvic Medicine and Reconstructive Surgery (FPMRS) fellowships in theUnited States. We compared surgical and non-surgical and education among training programs and expected surgical comfort level with pelvic reconstructive procedures from the perspective of the fellow and program director. An online survey was distributed to program directors and fellows from the 39 accredited FPMRS fellowships at the time (2010). Domains evaluated in the survey were academic education requirements;surgical approaches to prolapse and to incontinence;other surgical procedures;and research and publication expectations. In total, forty fellows from 21 programs and directors from 27 programs. The most common surgical procedures performed for apical, anterior, and posterior prolapse were uterosacral ligament suspension, native tissue anterior colporrhaphy, and posterior colporrhaphy, respectively. Differences in perceived surgical comfort level were seen for coccygeus suspension, graftreinforced posterior colporrhaphy, rectus fascial sling, urethral bulking agent, cystoscopic ureteral stent placement and bowel repair. A greater proportion of program directors reported that fellows would be comfortable performing these procedures upon graduation than the proportion reported by the fellows themselves. Differences exist in FPMRS training nationwide, however, responding fellows appeared to be trained in multiple approaches to prolapse repair. Differences were seen in surgical comfort level as perceived by fellows and program directors.展开更多
Objective:To compare the efficacy of anal adenectomy with virtual hanging wire and anal fistulotomy in the treatment of low anal fistula in infants and children.Methods:60 children with low anal fistula who were admit...Objective:To compare the efficacy of anal adenectomy with virtual hanging wire and anal fistulotomy in the treatment of low anal fistula in infants and children.Methods:60 children with low anal fistula who were admitted to our hospital from October 2021 to March 2022 and met the inclusion criteria were randomly divided into two groups of 30 cases each;the treatment group was treated with anal adenectomy and virtual hanging wire surgery,and the control group was treated with anal fistula resection.The clinical efficacy after treatment was compared.Results:The total effective rate of both groups was 96.67%and the difference between the two groups was not statistically significant(P>0.05).The postoperative pain score of the treatment group was lower than that of the control group(P<0.05).The length of hospitalization and healing time of the treatment group was lower than that of the control group(P<0.05).The anal function of the patients in both groups was normal,and there was no adverse reaction.Conclusion:Anal gland excision and virtual hanging surgery for the treatment of low anal fistula in infants and children have the advantages of mild pain,reduced length of hospitalization,short healing time,and better patient experience as compared to anal fistula excision.展开更多
目的探讨糖尿病对关节镜下肩袖修复术后病人肩关节功能恢复的影响。方法回顾性分析我科自2019年5月至2022年5月接受关节镜下肩袖修复术的62例肩袖损伤病人的临床资料和随访结果,其中糖尿病组30例,男18例,女12例,年龄为(62.10±11.87...目的探讨糖尿病对关节镜下肩袖修复术后病人肩关节功能恢复的影响。方法回顾性分析我科自2019年5月至2022年5月接受关节镜下肩袖修复术的62例肩袖损伤病人的临床资料和随访结果,其中糖尿病组30例,男18例,女12例,年龄为(62.10±11.87)岁;对照组32例,男18例,女14例,年龄为(63.78±12.98)岁。手术方式均为关节镜下缝线桥技术缝合肩袖。分别记录两组病人术前1周、术后3个月、6个月和12个月各时间点肩关节最大外展角度值,以及肩关节功能评分,包括疼痛视觉模拟量表(visual analogue scale,VAS)评分、美国肩肘外科协会(American Shoulder Elbow Surgeon,ASES)评分、加州大学洛杉矶分校(University of California at Los Angeles,UCLA)肩关节评分以及Constant⁃Murley评分。据此对手术效果进行评估。结果62例病人均未出现伤口感染、术后僵硬、术后再撕裂等并发症。两组病人的肩关节最大外展角度值、VAS评分、ASES评分、UCLA评分以及Constant⁃Murley评分均在术后3个月、6个月和1年得到显著改善(P<0.05)。糖尿病组的肩关节最大外展角度值及各肩关节功能评分在术前1周、术后3个月及6个月时均劣于对照组(P<0.05),但在术后12个月时,糖尿病组与对照组比较,差异无统计学意义(P>0.05)。结论糖尿病对关节镜下肩袖修复术后的病人短期恢复会存在影响,但长期临床结果没有显著差异。围手术期血糖控制良好的糖尿病病人在关节镜下肩袖修复术后表现出与非糖尿病病人相当的临床和结构恢复。展开更多
目的观察采用局部皮瓣修复儿童面部色素痣切除后组织缺损的临床疗效。方法回顾性分析浙江大学医学院附属儿童医院烧伤整形外科2018年1月至2022年1月收治的246例采用局部皮瓣修复的儿童面部色素痣切除后组织缺损患儿临床资料,总结患儿临...目的观察采用局部皮瓣修复儿童面部色素痣切除后组织缺损的临床疗效。方法回顾性分析浙江大学医学院附属儿童医院烧伤整形外科2018年1月至2022年1月收治的246例采用局部皮瓣修复的儿童面部色素痣切除后组织缺损患儿临床资料,总结患儿临床特征、病变位置及大小、皮瓣设计要点及术后外观改善情况。结果246例均皮瓣成活,切口均一期愈合;术后随访9个月至3年,无一例明显瘢痕增生或正常组织牵拉致外观畸形发生,外观改善均满意;246例瘢痕美容评估与评级量表(scar cosmesis assessment and rating,SCAR)评分(3.49±1.58)分,其中62例(62/246,25.2%)评分0~2分,为十分满意;138例(138/246,56.1%)评分3~4分,为比较满意;35例(35/246,14.2%)评分5~7分,为相对满意;11例(11/246,4.5%)评分>7分,为不满意;手术效果总体评分满意率为95.5%(235/246)。结论根据不同的面部美容分区选择合适的局部皮瓣来修复色素痣切除后的皮肤缺损,具有皮瓣成活佳、可避免局部组织牵拉、后期瘢痕不明显等优点,可获得良好的美容效果。展开更多
Aim： To characterize the feasibility of the surgical replacement of the penile tunica albuginea （TA） and to evaluate the value of a porcine bladder acellular matrix （BAM） graft. Methods： Acellular matrices were ...Aim： To characterize the feasibility of the surgical replacement of the penile tunica albuginea （TA） and to evaluate the value of a porcine bladder acellular matrix （BAM） graft. Methods： Acellular matrices were constructed from pigs＇ bladders by cell lysis, and then examined by scanning electron microscopy （SEM）. Expression levels of the mRNA of the vascular endothelial growth factor （VEGF） receptor, fibroblast growth factor （FGF）-1 receptor, neuregulin, and brain-derived neurotrophic factor （BDNF） in the acellular matrix and submucosa of the pigs＇ bladders were determined through the reverse transcription-polymerase chain reaction （PCR）. A 5 mm× 5 mm square was excised from the penile TA of nine rabbits. The defective TA was then covered in porcine BAM. Equal numbers of animals were sacrificed and histochemically examined at 2, 4 and 6 months after implantation. Results： SEM of the BAM showed collagen fibers with many pores. VEGF receptor, FGF-1 receptor and neuregulin mRNA were expressed in the porcine BAM; BDNF mRNA was not detected. Two months after implantation, the graft sites exhibited excellent healing without contracture, and the fusion between the graft and the neighboring normal TA appeared to be well established. There were no significant histological differences between the implanted tunica and the normal control tunica at 6 months after implantation. Conclusion： The porcine BAM graft resulted in a structure which was sufficiently like that of the normal TA. This implantation might be considered applicable to the reconstruction of the TA in conditions such as trauma or Peyronie＇s disease.展开更多
Soft tissue sarcoma accounts for approximately 1% of all cancers diagnosed annually in the United States. When these rare malignant mesodermal tumours arise in the pelvis and extremities, they may potentially encase o...Soft tissue sarcoma accounts for approximately 1% of all cancers diagnosed annually in the United States. When these rare malignant mesodermal tumours arise in the pelvis and extremities, they may potentially encase or invade large calibre vascular structures. This presents a major challenge in terms of safe excision while also leaving acceptable surgical margins. In recent times, the trend has been towards limb salvage with vascular reconstruction in preference to amputation. Newer orthopaedic and vascular reconstructive techniques including both synthetic and autogenous graft reconstruction have made complex limb-salvage surgery feasible. Despite this, limb-salvage surgery with concomitant vascular reconstruction remains associated with higher rates of post-operative complications including infection and amputation. In this review we describe the initial presentation and investigation of patients presenting with soft tissue sarcomas in the pelvis and extremities, which involve vascular structures. We further discuss the key surgical reconstructive principles and techniques available for the management of these complex tumours, drawn from our institution's experience as a national tertiary referral sarcoma service.展开更多
BACKGROUND Hutch diverticulum arises from the compromised muscular development at the ureteral orifice.It is a congenital disease and extremely rare in adult,only accounting for about 3%occurrence worldwide.It can be ...BACKGROUND Hutch diverticulum arises from the compromised muscular development at the ureteral orifice.It is a congenital disease and extremely rare in adult,only accounting for about 3%occurrence worldwide.It can be either symptomatic or asymptomatic,and relies on image tools for diagnosis and preoperative planning.Indications for surgery are dependent on the complications from the diverticulum.Metaplasia is about 10%among those with hutch diverticulum,and it still has chances turning into malignancy,especially urothelial cell carcinoma.CASE SUMMARY A 27-year-old man was presented with frequently recurrent urinary tract infection for one year,and had suffered from intermittent right flank pain for 3 mo.No past medical histories were recorded before.No obvious abnormalities on laboratory data and urine examination were found.Under ultrasound,right hydronephrosis was seen and an anatomical abnormality was observed on intravenous pyelography.Further computed tomography urogram showed one diverticulum seated at superolateral side of right ureteral orifice.Cystoscopy was done and biopsy results showed focal metaplasia.After discussing with him,roboticassisted diverticulectomy with reconstruction was performed.Right hydronephrosis was greatly improved after surgery.He has completed his 1.5-year follow-ups,and no malignancies were seen from urine cytology and image of intravenous pyelography.CONCLUSION Robotic-assisted diverticulectomy and reconstruction to hutch diverticulum is a safe and efficient operation,providing several advantages over open and laparoscopic ones.展开更多
基金The National Natural Science Foundation of China(No60675017)
文摘A new method to reconstruct 3D scene points from nonparallel stereo is proposed. From a pair of conjugate images in an arbitrarily configured stereo system that has been calibrated, coordinates of 3D scene points can be computed directly using the method, bypassing the process of rectifying images or iterative solution involved in existing methods. Experiment results from both simulated data and real images validate the method. Practical application to surgical navigator shows that the method has advantages to improve efficiency and accuracy of 3D reconstruction from nonparallel stereo system in comparison with the conventional method that employs algorithm for standard parallel axes stereo geometry.
文摘Data are scarce regarding surgical and non-surgical education in accredited Female Pelvic Medicine and Reconstructive Surgery (FPMRS) fellowships in theUnited States. We compared surgical and non-surgical and education among training programs and expected surgical comfort level with pelvic reconstructive procedures from the perspective of the fellow and program director. An online survey was distributed to program directors and fellows from the 39 accredited FPMRS fellowships at the time (2010). Domains evaluated in the survey were academic education requirements;surgical approaches to prolapse and to incontinence;other surgical procedures;and research and publication expectations. In total, forty fellows from 21 programs and directors from 27 programs. The most common surgical procedures performed for apical, anterior, and posterior prolapse were uterosacral ligament suspension, native tissue anterior colporrhaphy, and posterior colporrhaphy, respectively. Differences in perceived surgical comfort level were seen for coccygeus suspension, graftreinforced posterior colporrhaphy, rectus fascial sling, urethral bulking agent, cystoscopic ureteral stent placement and bowel repair. A greater proportion of program directors reported that fellows would be comfortable performing these procedures upon graduation than the proportion reported by the fellows themselves. Differences exist in FPMRS training nationwide, however, responding fellows appeared to be trained in multiple approaches to prolapse repair. Differences were seen in surgical comfort level as perceived by fellows and program directors.
基金Xi’an Municipal Bureau of Science and Technology,No.21YXYJ0060。
文摘Objective:To compare the efficacy of anal adenectomy with virtual hanging wire and anal fistulotomy in the treatment of low anal fistula in infants and children.Methods:60 children with low anal fistula who were admitted to our hospital from October 2021 to March 2022 and met the inclusion criteria were randomly divided into two groups of 30 cases each;the treatment group was treated with anal adenectomy and virtual hanging wire surgery,and the control group was treated with anal fistula resection.The clinical efficacy after treatment was compared.Results:The total effective rate of both groups was 96.67%and the difference between the two groups was not statistically significant(P>0.05).The postoperative pain score of the treatment group was lower than that of the control group(P<0.05).The length of hospitalization and healing time of the treatment group was lower than that of the control group(P<0.05).The anal function of the patients in both groups was normal,and there was no adverse reaction.Conclusion:Anal gland excision and virtual hanging surgery for the treatment of low anal fistula in infants and children have the advantages of mild pain,reduced length of hospitalization,short healing time,and better patient experience as compared to anal fistula excision.
文摘目的探讨糖尿病对关节镜下肩袖修复术后病人肩关节功能恢复的影响。方法回顾性分析我科自2019年5月至2022年5月接受关节镜下肩袖修复术的62例肩袖损伤病人的临床资料和随访结果,其中糖尿病组30例,男18例,女12例,年龄为(62.10±11.87)岁;对照组32例,男18例,女14例,年龄为(63.78±12.98)岁。手术方式均为关节镜下缝线桥技术缝合肩袖。分别记录两组病人术前1周、术后3个月、6个月和12个月各时间点肩关节最大外展角度值,以及肩关节功能评分,包括疼痛视觉模拟量表(visual analogue scale,VAS)评分、美国肩肘外科协会(American Shoulder Elbow Surgeon,ASES)评分、加州大学洛杉矶分校(University of California at Los Angeles,UCLA)肩关节评分以及Constant⁃Murley评分。据此对手术效果进行评估。结果62例病人均未出现伤口感染、术后僵硬、术后再撕裂等并发症。两组病人的肩关节最大外展角度值、VAS评分、ASES评分、UCLA评分以及Constant⁃Murley评分均在术后3个月、6个月和1年得到显著改善(P<0.05)。糖尿病组的肩关节最大外展角度值及各肩关节功能评分在术前1周、术后3个月及6个月时均劣于对照组(P<0.05),但在术后12个月时,糖尿病组与对照组比较,差异无统计学意义(P>0.05)。结论糖尿病对关节镜下肩袖修复术后的病人短期恢复会存在影响,但长期临床结果没有显著差异。围手术期血糖控制良好的糖尿病病人在关节镜下肩袖修复术后表现出与非糖尿病病人相当的临床和结构恢复。
文摘目的观察采用局部皮瓣修复儿童面部色素痣切除后组织缺损的临床疗效。方法回顾性分析浙江大学医学院附属儿童医院烧伤整形外科2018年1月至2022年1月收治的246例采用局部皮瓣修复的儿童面部色素痣切除后组织缺损患儿临床资料,总结患儿临床特征、病变位置及大小、皮瓣设计要点及术后外观改善情况。结果246例均皮瓣成活,切口均一期愈合;术后随访9个月至3年,无一例明显瘢痕增生或正常组织牵拉致外观畸形发生,外观改善均满意;246例瘢痕美容评估与评级量表(scar cosmesis assessment and rating,SCAR)评分(3.49±1.58)分,其中62例(62/246,25.2%)评分0~2分,为十分满意;138例(138/246,56.1%)评分3~4分,为比较满意;35例(35/246,14.2%)评分5~7分,为相对满意;11例(11/246,4.5%)评分>7分,为不满意;手术效果总体评分满意率为95.5%(235/246)。结论根据不同的面部美容分区选择合适的局部皮瓣来修复色素痣切除后的皮肤缺损,具有皮瓣成活佳、可避免局部组织牵拉、后期瘢痕不明显等优点,可获得良好的美容效果。
文摘Aim： To characterize the feasibility of the surgical replacement of the penile tunica albuginea （TA） and to evaluate the value of a porcine bladder acellular matrix （BAM） graft. Methods： Acellular matrices were constructed from pigs＇ bladders by cell lysis, and then examined by scanning electron microscopy （SEM）. Expression levels of the mRNA of the vascular endothelial growth factor （VEGF） receptor, fibroblast growth factor （FGF）-1 receptor, neuregulin, and brain-derived neurotrophic factor （BDNF） in the acellular matrix and submucosa of the pigs＇ bladders were determined through the reverse transcription-polymerase chain reaction （PCR）. A 5 mm× 5 mm square was excised from the penile TA of nine rabbits. The defective TA was then covered in porcine BAM. Equal numbers of animals were sacrificed and histochemically examined at 2, 4 and 6 months after implantation. Results： SEM of the BAM showed collagen fibers with many pores. VEGF receptor, FGF-1 receptor and neuregulin mRNA were expressed in the porcine BAM; BDNF mRNA was not detected. Two months after implantation, the graft sites exhibited excellent healing without contracture, and the fusion between the graft and the neighboring normal TA appeared to be well established. There were no significant histological differences between the implanted tunica and the normal control tunica at 6 months after implantation. Conclusion： The porcine BAM graft resulted in a structure which was sufficiently like that of the normal TA. This implantation might be considered applicable to the reconstruction of the TA in conditions such as trauma or Peyronie＇s disease.
文摘Soft tissue sarcoma accounts for approximately 1% of all cancers diagnosed annually in the United States. When these rare malignant mesodermal tumours arise in the pelvis and extremities, they may potentially encase or invade large calibre vascular structures. This presents a major challenge in terms of safe excision while also leaving acceptable surgical margins. In recent times, the trend has been towards limb salvage with vascular reconstruction in preference to amputation. Newer orthopaedic and vascular reconstructive techniques including both synthetic and autogenous graft reconstruction have made complex limb-salvage surgery feasible. Despite this, limb-salvage surgery with concomitant vascular reconstruction remains associated with higher rates of post-operative complications including infection and amputation. In this review we describe the initial presentation and investigation of patients presenting with soft tissue sarcomas in the pelvis and extremities, which involve vascular structures. We further discuss the key surgical reconstructive principles and techniques available for the management of these complex tumours, drawn from our institution's experience as a national tertiary referral sarcoma service.
文摘BACKGROUND Hutch diverticulum arises from the compromised muscular development at the ureteral orifice.It is a congenital disease and extremely rare in adult,only accounting for about 3%occurrence worldwide.It can be either symptomatic or asymptomatic,and relies on image tools for diagnosis and preoperative planning.Indications for surgery are dependent on the complications from the diverticulum.Metaplasia is about 10%among those with hutch diverticulum,and it still has chances turning into malignancy,especially urothelial cell carcinoma.CASE SUMMARY A 27-year-old man was presented with frequently recurrent urinary tract infection for one year,and had suffered from intermittent right flank pain for 3 mo.No past medical histories were recorded before.No obvious abnormalities on laboratory data and urine examination were found.Under ultrasound,right hydronephrosis was seen and an anatomical abnormality was observed on intravenous pyelography.Further computed tomography urogram showed one diverticulum seated at superolateral side of right ureteral orifice.Cystoscopy was done and biopsy results showed focal metaplasia.After discussing with him,roboticassisted diverticulectomy with reconstruction was performed.Right hydronephrosis was greatly improved after surgery.He has completed his 1.5-year follow-ups,and no malignancies were seen from urine cytology and image of intravenous pyelography.CONCLUSION Robotic-assisted diverticulectomy and reconstruction to hutch diverticulum is a safe and efficient operation,providing several advantages over open and laparoscopic ones.
