Study on impact of robotic-assisted orthopaedic industrial noise (SIREN).

INTRODUCTION: The aim of this study was to evaluate noise exposure to the operating room staff consisting of the surgeon, assistant, anaesthetist and Mako Product Specialist (MPS) during Mako robotic-arm assisted total knee arthroplasty (TKA) and total hip arthroplasty (THA). We aimed to determine whether employees were exposed to noise at or above a lower exposure action value (LEAV) set out by the Noise at Work Regulations 2005, Health and Safety Executive (HSE), UK. MATERIALS AND METHODS: We prospectively recorded intra-operative noise levels in Mako robotic-arm assisted TKA and THA over a period of two months using the MicW i436 connected to an iOS device (Apple), using the Sound Level Meter App (iOS) by the National Institute for Occupation Safety and Health (NIOSH). Data obtained was then used to calculate "worst case" daily exposure value to assess if sound levels were compliant with UK guidelines. Comparison between operating room staff groups was performed with ANOVA testing. RESULTS: A total of 19 TKA and 11 THA operations were recorded. During TKA, for the primary surgeon and the assistant, the equivalent continuous sound pressure level (LAeq) was over 80 dB, exceeding the LEAV set out by the Noise at Work Regulations by HSE. During THA, the average LAeq and peak sound pressure levels did not exceed the LEAV. The calculated daily exposure for the primary surgeon in TKA was 82 dB. A Tukey post hoc test revealed that LAeq was statistically significantly lower in the anaesthetist and MPS (p < .001) compared to the primary surgeon and assistant in both TKA and THA. CONCLUSIONS: Operating room staff, particularly the primary surgeon and assistant are exposed to significant levels of noise during Mako robotic-arm assisted TKA and THA. Formal assessments should be performed to further assess the risk of noise induced hearing loss in robotic-arm assisted arthroplasty.

Surgical Rib Fracture Fixation: Early Operative Intervention Improves Outcomes.

Background: This study aimed to assess the outcomes of patients with complex rib fractures undergoing operative or nonoperative management at our major trauma center. Methods: A retrospective review of all patients who were considered for surgical stabilization of rib fractures (SSRF) at a single major trauma center from May 2016 to September 2022 was performed. Results: In total, 352 patients with complex rib fractures were identified. Thirty-seven patients (11%) fulfilled the criteria for surgical management and underwent SSRF. The SSRF group had a significantly higher proportion of patients with flail chest (32 [86%] vs. 94 [27%], p<0.001) or Injury Severity Score (ISS) >15 (37 [100%] vs. 129 [41%], p<0.001). No significant differences were seen between groups for 1-year mortality. Patients who underwent SSRF within 72 hours were 6 times less likely to develop pneumonia than those in whom SSRF was delayed for over 72 hours (2 [18%] vs. 15 [58%]; odds ratio, 0.163; 95% confidence interval, 0.029-0.909; p=0.036). Prompt SSRF showed non-significant associations with shorter intensive care unit length of stay (6 days vs. 10 days, p=0.140) and duration of mechanical ventilation (5 days vs. 8 days, p=0.177). SSRF was associated with a longer hospital length of stay compared to nonoperative patients with flail chest and/or ISS >15 (19 days vs. 13 days, p=0.012), whilst SSRF within 72 hours was not. Conclusion: Surgical fixation of complex rib fractures improves outcomes in selected patient groups. Delayed surgical fixation was associated with increased rates of pneumonia and a longer hospital length of stay.

The use of digital tomosynthesis in suspected scaphoid fractures.

We report a retrospective observational series of patients undergoing digital tomosynthesis (DTS) for suspected scaphoid fractures. With a specificity and sensitivity of 100%, DTS demonstrates the potential to be an excellent tool in the diagnosis of occult scaphoid fractures.

Evaluation of sound levels in elective orthopaedic theatres during primary hip and knee arthroplasty.

BACKGROUND: Orthopaedic surgery involves tools which could cause noise-induced hearing loss in theatre staff. Threshold levels for occupational noise exposure have been developed in the U.K., above which action is required to reduce exposure. The aims of our study were to determine whether equivalent continuous sound pressure levels during elective arthroplasty can be measured using readily available materials, and to assess whether noise exposure levels stand within acceptable occupational noise exposure levels. MATERIALS AND METHODS: Sound pressure levels of orthopaedic saws were recorded using the MicW i436 connected to an iPhone 4S and the iOS SoundMeter application, and using a professional sound meter. Equivalent sound pressure levels were recorded for total hip replacement (THR) and total knee replacement (TKR) using the MicW i436 SoundMeter application. Data obtained was then used to calculate a "worst case" daily exposure value to assess if sound levels were compliant with U.K. RESULTS: Sound pressure levels recorded using the MicW i436 and Soundmeter application were accurate compared to professional soundmeter readings. THR showed equivalent sound pressure levels (LAeq) of 77 dBA and TKR showed a LAeq of 80 db. Calculated "worst case" scenarios for daily noise exposure using these values did not meet the lower exposure action values set out by U.K. CONCLUSIONS: It is possible to accurately measure continuous sound pressure levels during elective orthopaedic surgery using readily available materials. Noise exposure values during TKR meet lower exposure action values, and when "worst case" daily exposure levels are calculated this level is still lower than the threshold.

Return to sport following scaphoid fractures: A systematic review and meta-analysis.

BACKGROUND: Scaphoid fracture is the most commonly fractured carpal bone in the athletic patient, accounting for over 85% of all sport-related carpal bone fractures, and is particularly common in sports involving high impact injuries to the wrist. The management of such injuries comprises both conservative and surgical techniques, as guided by fracture location and type. Athletes demonstrate a unique challenge with regards to the management of scaphoid fractures due to their requirement to return to sport, as soon as able. AIM: To review systemically all studies recording return to sport following scaphoid fractures, to collate information on return rates to sport (RRS) and mean return times (RTS) to sport and to determine differences in sporting outcome for the various treatment methods. METHODS: A systematic search of MEDLINE, EMBASE, CINAHAL, Cochrane, Google Scholar, Physiotherapy Evidence Database, SPORTDiscus, Web of Science and Scopus was performed in August 2018 using the keywords "scaphoid", "fracture", "acute", "carpal", "athletes", "sports", "non-operative", "conservative", "operative" and "return to sport". All studies that recorded RRS and RTS following scaphoid fractures were included. RTS was recorded as the length of time from commencement of either primary conservative management or primary surgical procedure to return to sport. RESULTS: Eleven studies were included: Two randomised controlled trials, six retrospective cohort studies and three case series. Seven studies reported on conservative management (n = 77), and eight studies reported on surgical management (n = 83). For conservative management, RRS was 90% (69/77), and the mean RTS was 9.6 wk. Three studies allowed to return to sport in cast [RRS 89% (25/28); RTS 1.9 wk], and four studies required completion of cast treatment prior to returning to sport [RRS 90% (44/49); RTS 13.9 wk]. Four studies recorded fracture union data: Union rate 85% (47/55); mean time to union 14.0 wk. For surgical management, RRS was 98% (81/83), and RTS was 7.3 wk. Three studies reported on Percutaneous Screw Fixation [RRS 97% (32/33); RTS 6.5 wk], and five studies reported on Open Reduction Internal Fixation [RRS 98% (49/50); RTS 7.9 wk]. Six studies recorded fracture union data: Union rate 97% (69/71); mean time to union 9.8 wk. On meta-analysis, RRS (RR = 1.09; 95% confidence interval (CI): 1.00-1.18; P < 0.045), RTS (MD 2.3 wk; 95%CI: 0.79-3.87; P < 0.002), union rates (RR = 1.14; 95%CI: 1.01-1.28; P < 0.030) and mean times to union (MD 4.2 wk; 95%CI: 3.94-4.36; P < 0.001) were all significantly better for the surgical cohort compared to the conservative cohort. CONCLUSION: Surgical management of scaphoid fractures can provide significantly improved RRS and RTS to sport compared to conservative management. Both treatments, however, remain acceptable options, and athletes should be fully informed of the benefits and risks of both prior to deciding treatment plans. Immediate return to sport in a cast should be avoided due to the significant risk of non-union.

Sinus pericranii: long-term outcome in a 10-year-old boy with a review of literature.

Sinus pericranii is a rare cranial venous anomaly in which there is an abnormal communication between intracranial dural sinuses and extracranial venous structures, usually via an emissary transosseous vein. We report the case of a 10-year-old boy who was successfully managed conservatively. The clinical findings, investigations and management are discussed. We focus on the long-term management of these patients, with a review of the relevant literature.

Rare progression of cholangiocarcinoma: distal femoral metastasis.

Cholangiocarcinoma (CCA) is a rare cancer of the bile duct epithelial cells, with metastases to long bones rarely reported. We present the case of a woman aged 61 years, diagnosed with CCA 6 years previously. She presented with right thigh discomfort, rapidly progressing to immobility with severe pain. Radiological investigations revealed a lytic lesion in her right distal femur, most likely a metastatic deposit, at high risk of pathological fracture. This was managed with an en bloc resection and implantation of a distal femoral replacement. Pathology specimens from theatre confirmed metastatic CCA. Despite sustaining a subsequent fractured neck of femur on the operative side, she recovered well from surgery, with minimal pain and improved mobility on discharge. She restarted palliative chemotherapy. This case illustrates the option of definitive major surgery for the management of metastatic bone disease. As in this case, this can lead to improved symptom control and quality of remaining life.