腹腔镜下广泛全子宫切除联合盆腔淋巴结清扫术治疗早期宫颈癌临床效果分析

目的 探讨腹腔镜广泛子宫切除术和盆腔淋巴结清扫术治疗早期宫颈癌的临床价值。方法 2010-06—2014-06间共实施47例经腹腔镜(腹腔镜组)和42例开放(开放组)广泛子宫切除加盆腔淋巴结清扫术,回顾性分析患者的临床资料。记录2组手术时间、术中出血量、淋巴结切除数量、胃肠功能恢复时间、住院时间、手术并发症发生率等。结果 腹腔镜组术中出血量、切除的淋巴结数、胃肠功能恢复时间、术后住院时间明显优于开放组(P0.05),2组手术时间无显著差异(P0.05)。腹腔镜组平均随访(28.8±6.6)月,并发症发生率为14.9%(7/47),开放组平均随访(26.2±5.8)月,并发症发生率为14.3%(6/42),2组差异无统计学意义。结论 腹腔镜下广泛全子宫切除加盆腔淋巴结清扫术治疗早期宫颈癌,安全有效,具有创伤小,恢复快等优势。     

Extended trochanteric osteotomy: Component retrieval and repair

The burden of revision total hip arthroplasty is increasing due to the rising incidence of total hip arthroplasty. Frequently, additional exposure is needed that is not required during the initial procedure in order to adequately visualize the components and to avoid iatrogenic bone loss or complications. Several osteotomies have been described in order to help achieve this goal; however, we advocate for the extended trochanteric osteotomy. This osteotomy allows for a safe, efficient, and accurate method for revision of cemented or cementless femoral components.     

A narrative review of pelvic lymph node dissection in prostate cancer

Pelvic lymph node dissection (PLND) is an important component in the staging and prognostication of prostate cancer. We performed a narrative review to assess the literature surrounding PLND: (I) the current guideline recommendations and contemporary utilization, (II) the calculation of patient-specific risk to perform PLND using available nomograms, (III) to review the extent of dissection, and its associated outcomes and complications. Due to the improved lymph node yield, better staging, and theoretical improvement in the control of micro-metastatic disease, guidelines have supported the use of (extended-) PLND in patients deemed to be at intermediate or high risk of lymph node involvement (often at a threshold of 5% on modern risk nomograms). However, in practice, real-world utilization of PLND varies considerably due to multiple reasons. Conflicting evidence persists with no clear oncological benefit to PLND, and a small, but important, risk of morbidity. Complications are rare, but include lymphoceles; thromboembolic events; and more rarely, obturator nerve, vascular, and ureteric injury. Furthermore, changing disease incidence and stage migration in the context of earlier detection overall have led to a decreased risk of nodal disease. The trade-offs between the benefits, harms, and risk tolerance/threshold must be carefully considered between each patient and their clinician.     

Wound infections following open reduction and internal fixation of calcaneal fractures with an extended lateral approach

Purpose

Post-operative wound infections (PWI) following calcaneal fracture surgery can lead to prolonged hospital stay and additional treatment with antibiotics, surgical debridement or implant removal. Our aim was to determine the incidence of superficial and deep PWI and to identify risk factors (RF).

Methods

This study is a retrospective case series. All consecutive patients from 2000 to 2010 with a closed unilateral calcaneal fracture treated with open reduction and internal fixation (ORIF) by an extended lateral approach were included. Patient, fracture, trauma and peri-operative characteristics were collected, including RF such as smoking, diabetes mellitus, time to operation, pre-operative in- or outpatient management and wound closure technique. The primary end point was a PWI as defined by the US Centers for Disease Control and Prevention.

Results

A total of 191 patients were included of which 47 patients (24.6 %) had a PWI; 21 (11.0 %) and 26 (13.6 %) patients had a superficial and deep wound infection, respectively. American Society of Anesthesiologists (ASA) classification higher than ASA 1 was associated with an increased risk. Placement of a closed suction drain at the end of surgery was associated with less PWI (35 % vs 15 %, p = 0.002). In this study, none of the previously reported RF were associated with an increased risk for PWI.

Conclusions

ORIF of displaced calcaneal fractures is associated with a high rate of PWI of 25 %. Factors that were associated with an increased risk were ASA classification other than 1 and absence of a closed suction drain placement. A closed suction drain may be a protective measure to avoid wound complications.     

Investigating the feasibility of temperature-controlled accelerated drug release testing for an intravaginal ring

The objective of the present study was to investigate if temperature can be utilized to accelerate drug release from Nuvaring®, a reservoir type intravaginal ring based on polyethylene vinyl acetate copolymer that releases a constant dose of contraceptive steroids over a duration of 3 weeks. The reciprocating holder apparatus (USP 7) was utilized to determine real-time and accelerated etonogestrel release from ring segments. It was demonstrated that drug release increased with increasing temperature which can be attributed to enhanced drug diffusion. An Arrhenius relationship of the zero-order release constants was established, indicating that temperature is a valid parameter to accelerate drug release from this dosage form and that the release mechanism is maintained under these accelerated test conditions. Accelerated release tests are particularly useful for routine quality control to assist during batch release of extended release formulations that typically release the active over several weeks, months or even years, since they can increase the product shelf life. The accelerated method should therefore be able to discriminate between formulations with different release characteristics that can result from normal manufacturing variance. In the case of Nuvaring®, it is well known that the process parameters during the extrusion process strongly influence the polymeric structure. These changes in the polymeric structure can affect the permeability which, in turn, is reflected in the release properties. Results from this study indicate that changes in the polymeric structure can lead to a different temperature dependence of the release rate, and as a consequence, the accelerated method can become less sensitive to detect changes in the release properties. When the accelerated method is utilized during batch release, it is therefore important to take this possible restriction into account and to evaluate the accelerated method with samples from non-conforming batches that are explicitly “out of specification” under real-time test conditions.