Roles of DNA polymerase β on repair of DNA damaged by γ－rays irradiation

ＲｏｌｅｓｏｆＤＮＡｐｏｌｙｍｅｒａｓｅβｏｎｒｅｐａｉｒｏｆＤＮＡｄａｍａｇｅｄｂｙγ－ｒａｙｓｉｒｒａｄｉａｔｉｏｎＣａｉＪｉａｎｍｉｎｇ（蔡建明）；ＺｈｅｎｇＸｉｕｌｏｎｇ（郑秀龙）；ＬｕｏＣｈｅｎｇｊｉ（罗成基）；ＧａｏＪｉａｎｇｕｏ（高建国...     

Raz four-corner suspension for severe cystocele: Poor results

The Raz four-corner suspension for the treatment of severe (grades 3 and 4) cystocele has yielded poor results, and is the subject of this paper. During a 10-month period from June 1988 to April 1989, 27 patients with severe cystocele and genuine stress incontinence were treated by the Raz four-corner suspension. Each patient had full preoperative urodynamic evaluation. Twenty-two patients were available for follow-up examinations at 3.5–4 years. At the 6-week postoperative examination all patients had excellent support of the anterior vaginal wall, including the restoration of the anterolateral vaginal wall sulci. However, within 10 months, 6 patients had recurrence of cystoceles of grade 2 or more. These results led to the abandonment of this procedure. On long-term follow-up examination at 3.5–4 years, 59% (13/22) of the patients had recurrence of cystoceles of grade 2 or more. The possible causes for these poor results are discussed. At present therefore, the Raz four-corner suspension for severe cystoceles is not recommended.     

Recognition and management of patients with high-risk vesicovaginal fistulas: Implications for teaching and research

Vesicovaginal fistulas (VVFs) occurring as a result of obstetric trauma are a vast problem in Nigeria and Ghana, where at least 20 000 women await repair, and fewer than 50 physicians have the necessary expertise. Through a series of conferences those VVFs that are at high risk and those at low-risk for repair failure, were identified. A clinic was established where repair of low-risk VVFs was done on an ongoing basis in a remote region of Ghana. A visiting surgical team was utilized to repair the difficult, or high-risk, VVFs, which included 4–6 cm VVFs (3), recurrent VVF (1), combined VVF and RVF (rectovaginal fistula), a large 5 cm juxtacervical VVF (1), and a vesicouterine fistula (1). Management of these patients and others with VVF repair complications is discussed.     

INGUINAL HERNIA REPAIR BY LAPAROSCOPIC SURGEONS: EARLY EXPERIENCE AND ATTITUDES

The introduction of laparoscopic inguinal hernia repair (LIHR) has been controversial. A questionnaire was sent to all general surgeons in New Zealand to document the early experience with LIHR and attitudes towards it. Of the 118 replies (response rate 55%). 74 were from laparoscopic surgeons. 26 of whom had performed 564 (201 public. 363 private) LIHR (23 bilateral) until January 1994. Only nine (35%) of these surgeons had assisted an experienced surgeon before performing an LIHR. and only four (15%) were supervised by an experienced surgeon during their first case. The transabdominal preperitoneal technique of LIHR was used by 14 (54%) surgeons. the extraperitoneal technique by eight (31%), and the tronsabdominal onlny technique by four (15%). There were 29 (5%) recurrences, 17 (3%) neuropathies. seven (1.2%) conversions, four (0.7%) miijor perforations. and one (0.17%) death. Of the 26 surgeons who performed LIHR, 20 (77%) were concerned about the absence of long-term results. 14 (54%) considered that the optimal technique had not been established. 13 (50%) were concerned about the unique complications associated with LIHR. 11 (42%) were less enthusiastic about performing LIHR than previously. 10 (38%) were doubtful about its advantages, and six (23%,) were uncertain about its future and considered that it should only be performed within the context of a controlled trial. This study highlights a number of issues that need to be addressed before the role of LIHR can be determined.     

Assessment of oxidative DNA damage in the oxyR-deficient SOS chromotest strain Escherichia coli PQ300.

The SOS chromotest is a simple short-term genotoxicity assay measuring the induction of gene sfiA in Escherichia coli K-12. The recent availability of SOS tester strains with additional mutations in DNA repair or protection systems allows testing of DNA damaging compounds for genotoxic specificity. E. coli PQ300 differs from the standard SOS tester strain PQ37 in that it contains an additional mutation in gene oxyR that renders it more sensitive to oxidative genotoxins. The generation of reactive oxygen intermediates (ROI) by hydroperoxides (H2O2, t-butyl hydroperoxide, cumene hydroperoxide), gamma-radiation, glucose oxidase, and xanthine oxidase resulted in a more vigorous SOS response in strain PQ300 compared to strain PQ37. PQ300 was also more sensitive than PQ37 for the detection of reducing agents such as ascorbic acid, cysteine, and glutathione, which also alter the redox status of the bacterial cells. However, intercalating agents (adriamycin, bleomycin, and mitomycin C) and the UV- and radiomimetic compound 4-nitroquinoline-1-oxide whose DNA damaging potential are known also to involve ROI did not show significant differences between strains PQ37 and PQ300. It is concluded that the oxyR-deficient strain PQ300 is useful for detecting certain classes of genotoxins that change the oxidative/antioxidative balance of tester bacteria in the SOS chromotest.     

应用局部皮瓣治疗仰趾畸形

目的:探讨烧、创伤后,足背瘢痕挛缩所致仰趾畸形的治疗。方法:术中将足背瘢痕切除,彻底松解挛缩,将弓弦状伸肌腱切除部分或切断,切除部分挛缩的跖趾关节背侧关节囊,使关节复位,克氏针外固定,在拇指内侧或小趾侧,以跖趾关节处为蒂设计逆行皮瓣,转移覆盖外露的跖趾关节,供区及瘢痕切除后创面行全厚或断层皮片修复。结果:本组7例,均采用逆行皮瓣修复,畸形完全纠正,无继发畸形。结论:应用拇指及小趾侧方逆行皮瓣转移,治疗仰趾畸形可达到满意效果。     

短伸肌腱修复供足第1跖骨深横韧带(附55例报告)

目的在第2足趾移植再造拇指术中,应用     

Combined open and laparoscopic approach to chronic pain following open inguinal hernia repair

Introduction: Chronic groin pain is the most common long-term complication after open inguinal hernia repair. Traditional surgical management of the associated neuralgia consists of injection therapy followed by groin exploration, mesh removal, and nerve transection. The resultant hernia defect may be difficult to repair from an anterior approach. We evaluate the outcomes of a combined laparoscopic and open approach for the treatment of chronic groin pain following open inguinal herniorrhaphy. Methods: All patients who underwent groin exploration for chronic neuralgia after a prior open inguinal hernia repair were prospectively analyzed. Patient demographics, type of prior hernia repair, and prior nonoperative therapies were recorded. The operation consisted of a standard three trocar laparoscopic transabdominal preperitoneal hernia repair, followed by groin exploration, mesh removal, and nerve transection. Outcome measures included recurrent groin pain, numbness, hernia recurrence, and complications. Results: Twelve patients (11 male and 1 female) with a mean age of 41 years (range 29–51) underwent combined laparoscopic and open treatment for chronic groin pain. Ten patients complained of unilateral neuralgia, one patient had bilateral complaints, and one patient complained of orchalgia. All patients failed at least two attempted percutaneous nerve blocks. Prior repairs included Lichtenstein (n=9), McVay (n=1), plug and patch (n=1), and Shouldice (n=1). There were no intraoperative complications or wound infections. With a minimum of 6 weeks follow up, all patients were significantly improved. One patient complained of intermittent minor discomfort that required no further therapy. Two patients had persistent numbness in the ilioinguinal nerve distribution but remained satisfied with the procedure. Conclusions: A combined laparoscopic and open approach for postherniorrhaphy groin pain results in good to excellent patient satisfaction with no perioperative morbidity. It may be the preferred technique for the definitive management of chronic neuralgia after prior open hernia repair.     

跨矢状窦脑膜瘤术中矢状窦的处理

目的总结跨矢状窦脑膜瘤术中矢状窦的处理方法.方法对26例跨矢状窦脑膜瘤及受累矢状窦进行切除,依具体情况重建或不重建矢状窦.结果该组病人无手术死亡,手术后均未加重原有神经功能障碍,无脑血液回流障碍,7例重建矢状窦者未发现有矢状窦内血栓形成.结论矢状窦旁脑膜瘤的治疗除肿瘤切除外,对受累上矢状窦处理是否彻底对预防术后复发是至关重要的.对受累矢状窦应按具体情况按一定的原则进行积极处理.     

无张力腹股沟疝修补术中应用个体化裁剪双重平面补片的临床观察

目的探讨个体化平面补片在开放式无张力疝修补术中的临床效价。方法将60例腹股沟疝患者随机分为平面补片组、疝环充填补片组进行前瞻性对比研究。结果两组在住院天数、术后并发症、术后不适感、复发率等方面差异无统计学意义;平面补片组的手术费用则明显较其他组低。结论利用平面补片进行个体化剪裁、增加腹膜前平片的方法行无张力疝修补术,其临床效果与疝环充填补片相似,但具有材料价格较低、术式简单、手术时间短等优点,适合在基层医院开展。