The BioPro Thumb Carpometacarpal Hemiarthroplasty: Case Series and Surgical Technique.

Thumb carpometacarpal (CMC) osteoarthritis is painful and debilitating. Here, we explore outcomes of a modular, press-fit thumb CMC hemiarthroplasty prosthesis (BioPro). This surgical option permits minimal bone resection, sparing the trapezium, hence allowing revision options if necessary. A retrospective review of all cases of the modular thumb CMC implants performed at one community US center between 2018 and 2021 were included and invited for email or telephone review. Electronic records were examined for demographics, patient outcomes, and morbidity. Eleven patients underwent 11 thumb CMC joint hemiarthroplasties, mean age was 64.8 years (SD: 7.68 y), with 6 females. Six received surgery on their dominant extremity. Two were manual workers (both in the medical field), 6 office-based, 2 retired, and 1 homemaker. The preoperative median pain score (Visual Analog Score) was 8/10 (range: 5 to 10), reducing to 1/10 (range: 1 to 10) ( P =0.000033) with a median follow-up of 23 months (range: 13 to 39 mo). In all, 8/11 patients reported they would recommend this surgery to friends and family and opt for the same surgery on their contralateral hand if necessary. One patient reported persistent pain a year postoperatively. On review, the head of the implant was placed too deep into the trapezium. Another center found that this patient had a postoperative trapezium fracture and underwent revision with implant removal and conversion to a suspension arthroplasty. At 12 months, 10/11 thumb CMC hemiarthroplasty showed good pain relief, function, and patient satisfaction. The BioPro has a low risk of subluxation and allows salvage options to remain available should failure occur.

The comparison of functional bracing of humeral shaft fractures: thermoplastic custom against preprepared commercial braces.

BACKGROUND: Functional humeral bracing of midshaft humeral fractures has been widely accepted as a gold standard for nonoperative treatment. Despite reported high union rates, there is no proven superiority of any orthosis. Here we aim to compare the outcomes after the use of custom-made thermoplastic vs. commercial humeral brace with regard to time to union, nonunion rates, types of nonunion, and conversion to surgery. METHODS: Patients with humeral fractures treated between 2018 and 2021 were identified retrospectively by electronic records. Only diaphyseal humerus fractures (AO 12) were included in the study. Proximal (AO 11) or distal (AO 13) fractures, open fractures, pathologic fractures, bilateral fractures, multiple fractures, and patients lost to follow-up were excluded. Patients attending one center received a custom-made thermoplastic splint, whereas those at the other center had an off-the-shelf humeral brace applied. Radiologic union was defined as healing of at least 3 of 4 cortices determined from follow-up radiographs. Data calculations were performed using the χ2 test. RESULTS: A total of 53 patients treated with a thermoplastic brace and 43 with a commercial brace were identified. A total of 52 men were included, and the cohort's mean age was 60.1 years (standard deviation: 16.1 years). Both groups had similar gender and age distributions. More patients achieved union with a thermoplastic brace (79.2%) than those with a commercial brace (76.7%), which was statistically significant (χ2, P = .04). Although time to union was similar both clinically and radiologically, patients with a commercial brace converted to surgical treatment more frequently (11 vs. 14 cases). CONCLUSION: Thermoplastic custom-made braces provide better fracture stability, allowing for statistically significantly higher rates of fracture union during a similar treatment period to commercially available splints. Patients wearing a commercial splint were significantly more likely to develop hypertrophic nonunion requiring surgery.

Assessing Bone Mineral Density Using Radiographs of the Hand: A Multicenter Validation.

PURPOSE: Osteoporosis and fragility fractures incur substantial costs to quality of life and global health care systems. The current gold standard for quantifying bone density is dual-energy X-ray absorptiometry. Our hypothesis is that bone density can be accurately predicted with a simpler method using plain radiographs of the hand. METHODS: This retrospective cohort study was undertaken in two centers in the United Kingdom, where the second metacarpal cortical percentage (2MCP) scores were calculated from radiographs. This study included patients who had sustained a distal radius fracture between 2020 and 2022 and had received both a posteroanterior radiograph of the hand and a dual-energy X-ray absorptiometry scan within 12 months of their radiograph and fracture. The Pearson correlation coefficient was calculated to determine the correlation between 2MCP scores and t-scores of the femoral neck on dual-energy X-ray absorptiometry scans. RESULTS: Of the 188 patients, the 2MCP score significantly correlated with bone density t-scores of the femoral neck. A 2MCP score <50% demonstrated 100% sensitivity and 100% specificity for differentiating osteoporotic from normal subjects, whereas a 2MCP score <60% demonstrated 94.4% sensitivity and 83.0% specificity in differentiating osteopenic from normal subjects. CONCLUSIONS: These data confirm that the likelihood of osteoporosis being present can be determined via the 2MCP score. TYPE OF STUDY/LEVEL OF EVIDENCE: Diagnostic I.

Predicting Pathological Fractures at Metastatic Humeral Lesions.

The humerus is the second most common site of metastatic disease involving long bones, yet it is still unclear which patients are at high risk for a fracture and may require prophylactic surgical fixation. The goal of this study was to assess the validity of the Mirels score to predict fractures of metastatic lesions in the humerus. Methods: We performed a retrospective electronic chart review of patients with humeral metastases at our institution (2005 to 2021), with 188 patients meeting the inclusion criteria. Sixty-one of the patients developed a fracture during follow-up. The metastatic humeral lesions were scored according to the Mirels rating system and additional radiographic criteria (cortical breach, location within the humerus, number of lesions). The predictive value of each Mirels score cutoff for fracture was assessed using sensitivity, specificity, area under the receiver operating characteristic curve (AUC), and multivariate logistic regression. Survivorship until fracture was analyzed for each Mirels score cutoff using Kaplan-Meier curves and the log-rank test. Significance was set at p < 0.01. Results: There were no significant differences in age, sex, side of the lesion, type of malignancy, and radiation dose between the groups with and without fracture (all p > 0.01). A Mirels score of ≥8 points had the best predictive profile, with sensitivity of 83.6%, specificity of 79.5%, and AUC of 0.82 (95% confidence interval [CI], 0.75 to 0.88, p < 0.01). A logistic regression model also demonstrated that a Mirels score of ≥8 (odds ratio = 5.8, 95% CI = 1.9 to 18.2, p < 0.01) and a cortical breach (odds ratio = 21.0, 95% CI = 5.7 to 77.2, p < 0.01) were significant predictors of pathological fracture. No other radiographic characteristics were found to be significant predictors of fracture. Conclusions: This study indicated that a Mirels score of ≥8 points had the best predictive profile for anticipating fractures at a metastasis in the humerus. This is in contrast to the traditional Mirels definition of an impending pathological fracture that is used for the lower extremity, a score of ≥9. Additionally, the presence of a cortical breach was a significant predictor of fracture risk. Level of Evidence: Prognostic Level III. See Instructions for Authors for a complete description of levels of evidence.

Insights and trends review: the role of three-dimensional technology in upper extremity surgery.

The use of three-dimensional (3-D) technology in upper extremity surgery has the potential to revolutionize the way that hand and upper limb procedures are planned and performed. 3-D technology can assist in the diagnosis and treatment of conditions, allowing virtual preoperative planning and surgical templating. 3-D printing can allow the production of patient-specific jigs, instruments and implants, allowing surgeons to plan and perform complex procedures with greater precision and accuracy. Previously, cost has been a barrier to the use of 3-D technology, which is now falling rapidly. This review article will discuss the current status of 3-D technology and printing, including its applications, ethics and challenges in hand and upper limb surgery. We have provided case examples to outline how clinicians can incorporate 3-D technology in their clinical practice for congenital deformities, management of acute fracture and malunion and arthroplasty.

Pyrocarbon Lunate Replacements Perform Well at Two Years: A Retrospective Case Series and Technique from Two UK Tertiary Centres.

Background: We report medium-term results in our case series of patients with Kienböck disease receiving a pyrocarbon lunate replacement (Integra, Smith and Nephew, Watford, UK). Methods: Patients with Kienböck receiving a pyrocarbon lunate between September 2012 and November 2020, with stage 3b and above were included. Patients were staged preoperatively with radiographs and MRIs. Pre- and postoperative visual analogue scores and movement were documented. Postoperative radiographs were obtained at 6 weeks, 6 months and 1 year. Results: Seven patients were identified, all female, with a median age of 28.0 years. All but one had 3b disease and the median follow-up was 2 years (range 13-112 months). A mean 9/10 preoperative VAS score improved to 1/10 by 3 months postoperatively (p < 0.001, paired t-test). No major complications were seen, and implants were stable radiologically. Conclusions: A semi-constrained pyrocarbon lunate can provide good results for patients with advanced Kienböck's disease, offering an alternative to proximal row carpectomy salvage surgery. Level of Evidence: Level IV (Therapeutic).

Hand Carpometacarpal Joint Instability in Elite Boxers: Injury Characteristics, Surgical Technique, and Outcomes.

PURPOSE: We describe a single-surgeon's experience of managing hand carpometacarpal joint (CMCJ) instability in elite boxers, focusing on injury characteristics, surgical technique, and outcomes. METHODS: This retrospective cohort included consecutive elite boxers undergoing surgery for hand CMCJ instability from 2009 to 2021. CMC joint instability is usually clear on clinical examination using a 'seesaw' test. All cases had a plain radiograph and in equivocal cases for instability advanced imaging such as MRI or ultrasound scan. CMCJs were accessed via longitudinal incisions between index/middle rays, and additionally ring/little. Often marked deficiency in the CMCJ ligamentous capsule was seen. The articular surfaces were decorticated to cancellous bone and autogenous bone graft impacted. The CMCJs were fixed in extension using various methods, latterly memory staples. Outcomes included radiographic fusion, return to boxing, and complications. RESULTS: Forty hands had surgery in 38 boxers. In total, 101 CMCJs were fused, with an average of 2.5 joints per patient. Patients were mainly young (mean age 24.1 years), male (37/38) with the trailing hand more commonly affected (trailing hand 87.5%, leading hand 12.5%). The most frequently fused CMCJ was the index (97.5%, n = 39), then middle (95%, n = 38), ring (45%, n = 18), and little (15%, n = 6). There were 82% (31/38) of patients who returned to the same level of boxing at a median of 8 months from surgery (range 3-27 months). Three patients had revision surgery for non-union, a median of 10.3 months after initial surgery (range 9.4-133.1 months): 2 for index/middle and one for the little CMCJ. All 3 revisions fused and the patients returned to boxing at the same level, although the little CMCJ required a second bone graft and fixation. CONCLUSIONS: Patients can achieve full recovery after treatment of CMCJ instability, and most can return to boxing at the same level with little risk of complications. TYPE OF STUDY/LEVEL OF EVIDENCE: Therapeutic IV.

The Shoulder Lever Test - Technical Tip for Instability Assessment in Large Shoulders.

Introduction: The classical shoulder tests for instability of the glenohumeral joint are the load and shift and drawer tests. Here, the humeral head is gripped between fingers and thumb to assess translation. This can be challenging to perform accurately in obese individuals and muscular athletes. Technical Tip: The shoulder and upper arm is utilized as a Class 3 lever. By fixing the patient's elbow (fulcrum) and applying translational force on the humerus (force), the instability at the glenohumeral joint (load) can be accurately judged. The mechanical advantage of a Class 3 lever is utilized to generate maximal displacement at the glenohumeral joint by applying minimal translational force at the humerus. The translation can be graded with the modified Hawkins scale. Conclusion: The shoulder lever test obviates the need to grip the humeral head in obese and well-built individuals to accurately judge the translation at the glenohumeral joint, improving the clinical yield.

Thumbs up: Needle marker technique for preoperative localisation of radiolucent foreign bodies with ultrasonography.

BACKGROUND: A 26-year-old man presented with pain and swelling after pricking his right thumb pulp with a thorn, gardening three-weeks previously. TECHNIQUE: After a thumb digital ring block with local anesthetic, a linear array ultrasound (US) transducer (frequency XX) identified a foreign body (FB) in both longitudinal and transverse planes. This was a hyperechoic FB, 5mm in length with surrounding hypoechoic shadow, denoting granulation tissue and fluid collection. Two 20G needles were passed orthogonally, in-line with the US transducer, from the fingertip and ulnar aspect. The needle tips were placed touching, just deep to the FB, preventing displacement. A longitudinal incision was made over the intersection, revealing the FB. DISCUSSION: Here, we describe peri-operative localization of radiolucent FBs with ultrasonography needle placement in superficial or deep planes as an adjunct to necessary surgical exploration. This method has a small learning curve, reduces the required incision and helps prevent pushing the FB deeper during dissection.

A 16-year Longitudinal Cohort Study of Incidence and Bacteriology of Necrotising Fasciitis in England.

BACKGROUND: Necrotising fasciitis (NF) is a rapidly progressive, destructive soft tissue infection with high mortality. The primary aim of this study was to evaluate the incidence and mortality of NF amongst patients admitted to English National Health Service (NHS) hospitals. The secondary aims included the identification of risk factors for mortality and causative pathogens. METHODS: The Hospital Episodes Statistics database identified patients with NF admitted to English NHS Trusts from 1/1/2002 to 31/12/2017. Information on patient demographics, co-morbid conditions, microbiology specimens, surgical intervention and in-hospital mortality was collected. Uni- and multivariable analyses were performed to investigate factors related to in-hospital mortality. RESULTS: A total of 11,042 patients were diagnosed with NF. Age-standardised incidence rose from 9 per million in 2002 to 21 per million in 2017 (annual percentage change = 6.9%). Incidence increased with age and was higher in men. Age-standardised mortality rate remained at 16% over the study period, while in-hospital mortality declined. On multivariable analysis, the following factors were associated with increased risk of in-hospital mortality: emergency admission, female sex, history of congestive heart failure, peripheral vascular disease, chronic kidney disease and cancer. Admission year and diabetes, which was significantly prevalent at 27%, were not associated with increased risk of mortality. Gram-positive pathogens, particularly Staphylococci, decreased over the study period with a corresponding increase in Gram-negative pathogens, predominantly E. coli. CONCLUSION: The incidence of NF increased markedly from 2002 to 2017 although in-hospital mortality did not change. There was a gradual shift in the causative organisms from Gram-positive to Gram-negative.

Potential cost savings by minimisation of blood sample delays on care decision making in urgent care services.

BACKGROUND: Timely availability of blood sample results for interpretation affects planning and delivery of patient care from initial assessment in Accident and Emergency (A&E) departments. MATERIALS AND METHODS: Rates of, and reasons for, rejected blood samples submitted from all clinical areas over one month were evaluated. Haemoglobin (Hb) represented haematology and potassium (K+), biochemistry. A prospective observational study evaluated the methodology of sample collection and impact on utility. RESULTS: 16,061 haematology and 16,209 biochemistry samples were evaluated; 1.4% (n = 229, range 0.5-7.3%) and 4.7% (n = 762, range 0.9-14%) respectively were rejected, with 14% (n = 248/1808) K+ rejection rate in A&E. Patients with rejected K+ and Hb had a longer median in-hospital stay of 9 and 76 h respectively and additional stay fixed costs of £26,824.74 excluding treatment. The rejection rate with Vacutainer and butterfly (4.0%) was lower than Vacutainer and cannula (28%). CONCLUSION: Sample rejection rate is high and is associated with increased in-hospital stay and cost. Blood sampling technique impacts on rejection rates. Reduction in sample rejection rates in emergency care areas in acute hospitals has the potential to impact on patient flow and reduce cost.

The effects of cobalt-chromium-molybdenum wear debris in vitro on serum cytokine profiles and T cell repertoire.

Cobalt-chromium-molybdenum (CoCrMo) alloy-based metal-on-metal prostheses have been the implant of choice for total hip replacement in younger patients. However 6.2% of patients require revision of their CoCrMo total hip replacement (THR) implant within five years of surgery and their use was restricted in 2013. We aimed to determine if there were individual differences in the immune response to wear debris that might indicate a poor outcome with a CoCrMo prosthesis. Blood from 22 donors was incubated with CoCrMo particles (>99.9% less than 10 µm diameter) generated by a wear simulator for 24 h. T cell phenotype was assessed by immunostaining and secretion of 8 different pro- and anti-inflammatory cytokines was measured using multiplex technology. Clear differences were seen between individuals in the induction of Th17 and Th1 responses, with some donors showing pro-inflammatory responses (increased IL17 or IFNγ) and others showing anti-inflammatory responses (decreased IL17 or IFNγ). The only differences seen for gender and age related to increased IL-10 expression from T cells in females (p = 0.008) and a trend towards decreased IL-6 expression systemically for older donors (p = 0.058). We conclude that individuals show differential responses to CoCrMo wear debris and that these responses could give early indications of the suitability of the patient for a metal-on-metal prosthesis.

Dentate gyrus progenitor cell proliferation after the onset of spontaneous seizures in the tetanus toxin model of temporal lobe epilepsy.

Temporal lobe epilepsy alters adult neurogenesis. Existing experimental evidence is mainly from chronic models induced by an initial prolonged status epilepticus associated with substantial cell death. In these models, neurogenesis increases after status epilepticus. To test whether status epilepticus is necessary for this increase, we examined precursor cell proliferation and neurogenesis after the onset of spontaneous seizures in a model of temporal lobe epilepsy induced by unilateral intrahippocampal injection of tetanus toxin, which does not cause status or, in most cases, detectable neuronal loss. We found a 4.5 times increase in BrdU labeling (estimating precursor cells proliferating during the 2nd week after injection of toxin and surviving at least up to 7days) in dentate gyri of both injected and contralateral hippocampi of epileptic rats. Radiotelemetry revealed that the rats experienced 112±24 seizures, lasting 88±11s each, over a period of 8.6±1.3days from the first electrographic seizure. On the first day of seizures, their duration was a median of 103s, and the median interictal period was 23min, confirming the absence of experimentally defined status epilepticus. The total increase in cell proliferation/survival was due to significant population expansions of: radial glial-like precursor cells (type I; 7.2×), non-radial type II/III neural precursors in the dentate gyrus stem cell niche (5.6×), and doublecortin-expressing neuroblasts (5.1×). We conclude that repeated spontaneous brief temporal lobe seizures are sufficient to promote increased hippocampal neurogenesis in the absence of status epilepticus.

An alternative option in the management of blunt splenic injury.

Splenic injury is a preventable cause of mortality following blunt trauma. The majority of splenic injuries can be managed conservatively. Laparotomy is indicated in the haemodynamically unstable patient, or those with other intra-abdominal injuries requiring surgery. Angio-embolization can be used to achieve haemostasis and preserve splenic parenchyma. The expertise and experience of the multidisciplinary trauma team and resources of the receiving facility are critical in determining the optimal management approach. We present a patient with a successful outcome following selective angio-embolization for ongoing bleeding from a Grade 4 splenic injury.

Influenza vaccination of future healthcare workers: a cross-sectional study of uptake, knowledge and attitudes.

Promotional campaigns recommend immunisation against influenza in healthcare workers (HCWs) but the uptake in this group remains low. We conducted a survey study during the 2008-2009 influenza vaccination period amongst future HCWs to quantify uptake and identify barriers to immunisation. Overall uptake was 8.0% (95% CI 5.9-10.8%), which is lower than the uptake amongst current HCWs (13.4%) and short of current government targets (75%). Knowledge about influenza was good but insufficient to encourage HCWs to get vaccinated. Promotional campaigns are needed that emphasise the role of vaccination in personal and patient protection.