Comparison of coagulation and fibrinolysis in Irish Wolfhounds and age-matched control dogs using tissue plasminogen activator-augmented viscoelastic testing.

OBJECTIVE: To determine if Irish Wolfhounds (IWs), like other sighthounds, are hyperfibrinolytic compared with nonsighthound dogs using 2 native and tissue plasminogen activator (tPA)-enhanced viscoelastic assays, one that is whole blood-based (viscoelastic coagulation monitor [VCM]) and the other that is plasma-based thromboelastography (TEG). DESIGN: Cohort study. SETTING: University teaching hospital. ANIMALS: A convenience sample of 27 IWs recruited from the Irish Wolfhound Association of New England Specialty and the local community, and 27 healthy, age-matched, large-breed control dogs. INTERVENTIONS: None. MEASUREMENTS AND MAIN RESULTS: Blood samples including CBC, biochemistry, traditional coagulation, and viscoelastic testing were collected from IWs and control dogs. Twelve IWs had viscoelastic testing. IWs had lower fibrinogen concentrations (215.5 ± 57.8 vs 251.4 ± 64.5 mg/dL, P = 0.034) and formed weaker clots on both whole-blood VCM and plasma TEG assays (maximum clot firmness [VCM-MCF] = 39.4 [25.1-48.8] vs 48.5 [34.6-57.3], P = 0.0042; maximum amplitude [TEG-MA] = 22.7 [14.7-33.6] vs 32.2 [26.9-42.0], P < 0.0001). IWs were hyperfibrinolytic compared with control dogs on VCM whole-blood assays, with 25 U/mL tPA (lysis at 30 min [VCM-LI30] = 68.1 [0-100] vs\ 99.9 [63.3-100], P = 0.0009; lysis at 45 min [VCM-LI45] = 31.0 [0-100] vs 98.1 [38.4-100], P = 0.0002) but hypofibrinolytic compared with controls on TEG plasma assays with 50 U/mL tPA (lysis at 30 min [TEG-LY30] = 45.7 [4.6-94.6] vs 93.7 [12.3-96.5], P = 0.0004; lysis at 60 min [TEG-LY60] = 68.7 [29.7-96.8] vs 95.7 [34.4-97.6], P = 0.0003). Minimal fibrinolysis was measured on whole-blood VCM or plasma TEG assays without the addition of tPA, and there were no differences between the 2 groups. CONCLUSIONS: Weaker clots were found in IWs than control dogs. With the addition of tPA, IWs had evidence of hyperfibrinolysis on whole-blood VCM assays and hypofibrinolysis on plasma TEG assays compared with control dogs. Without the addition of tPA, however, both groups of dogs showed minimal fibrinolysis on viscoelastic testing.

Revision Rates in Cosmetic Plastic Surgery with and without Resident Involvement.

Background: Changes in surgical education have caused concern over residents' preparedness for independent practice. As the field of otolaryngology requires such a wide breadth of expertise, ill preparation becomes especially costly. This study explores how the presence and participation of a postgraduate year 3 (PGY3) otolaryngology resident in surgery impacts revision rates and operating time as gauges for the resident competency and indirect training costs. Methods: A retrospective chart analysis of patients who underwent cosmetic plastic surgery at sites for PGY3 otolaryngology residents' facial plastic surgery rotations was conducted. Residents performed one side of bilateral procedures (eg, blepharoplasties) and approximately 50% of midline procedures (eg, rhinoplasties). Chi-squared testing and odds/risk ratios were done to assess the effect of resident involvement on revision rates. Operating time was compared using t tests. Results: When a resident was involved in cosmetic surgery, the revision rate was 22.2% compared with 3.6% without. The likelihood of a future revision surgery was 7.57 times higher when a resident participated in the original operation. Resident involvement was not a statistically significant predictor of exceeding the allotted operating time. Conclusions: The revision rate of cosmetic surgery was much higher when a resident was involved. Otolaryngology residents would benefit from increased facial plastic and reconstructive surgery training. As a response to this analytical study, this clinical rotation was moved to be offered at a later stage of postgraduate surgical training to allow residents to gain more experience and be better set up for success in the rotation.

Operation Diversify Plastic Surgery: An Innovative Strategy to Increase Diversity in Plastic and Reconstructive Surgery.

Healthcare disparities remain a significant problem facing the US healthcare system with recent evidence of persistent racial and ethnic disparities especially among patients from minority backgrounds. Recent studies have documented advantages to a racially and ethnically diverse surgical workforce such as higher patient satisfaction scores, superior patient compliance with physician recommendations, and increased participation in clinical research studies by minority patients. In plastic and reconstructive surgery (PRS), there is a noted deficit among residents and faculty that come from ethnically underrepresented in medicine (URiM) backgrounds despite recent efforts to increase diversity in PRS surgeons. URiM medical students from three of the four historically Black medical universities organized to discuss pathways to PRS. Operation Diversify Plastic Surgery is a student-led organization that was developed to address the lack of diversity in PRS, challenges faced by students from institutions that lack PRS residency training programs, and unique factors that affect URiM students interested in PRS. Available studies note that mentoring relationships and research opportunities were instrumental in recruiting URiM students into PRS residency programs. Operation Diversify Plastic Surgery is an innovative solution to the insufficient URiM PRS residency candidate pool by increasing medical student exposure to PRS via educational lectures, virtual mentoring opportunities, and insights into research fellowships.

Rates of National Institutes of Health Funding for Surgeon-Scientists, 1995-2020.

Importance: Surgeon-scientists are uniquely positioned to facilitate translation between the laboratory and clinical settings to drive innovation in patient care. However, surgeon-scientists face many challenges in pursuing research, such as increasing clinical demands that affect their competitiveness to apply for National Institutes of Health (NIH) funding compared with other scientists. Objective: To examine how NIH funding has been awarded to surgeon-scientists over time. Design, Setting, and Participants: This cross-sectional study used publicly available data from the NIH RePORTER (Research Portfolio Online Reporting Tools Expenditures and Results) database for research project grants awarded to departments of surgery between 1995 and 2020. Surgeon-scientists were defined as NIH-funded faculty holding an MD or MD-PhD degree with board certification in surgery; PhD scientists were NIH-funded faculty holding a PhD degree. Statistical analysis was performed from April 1 to August 31, 2022. Main Outcome: National Institutes of Health funding to surgeon-scientists compared with PhD scientists, as well as NIH funding to surgeon-scientists across surgical subspecialties. Results: Between 1995 and 2020, the number of NIH-funded investigators in surgical departments increased 1.9-fold from 968 to 1874 investigators, corresponding to a 4.0-fold increase in total funding (1995, $214 million; 2020, $861 million). Although the total amount of NIH funding to both surgeon-scientists and PhD scientists increased, the funding gap between surgeon-scientists and PhD scientists increased 2.8-fold from a $73 million difference in 1995 to a $208 million difference in 2020, favoring PhD scientists. National Institutes of Health funding to female surgeon-scientists increased significantly at a rate of 0.53% (95% CI, 0.48%-0.57%) per year from 4.8% of grants awarded to female surgeon-scientists in 1995 to 18.8% in 2020 (P < .001). However, substantial disparity remained, with female surgeon-scientists receiving less than 20% of NIH grants and funding dollars in 2020. In addition, although there was increased NIH funding to neurosurgeons and otolaryngologists, funding to urologists decreased significantly from 14.9% of all grants in 1995 to 7.5% in 2020 (annual percent change, -0.39% [95% CI, -0.47% to -0.30%]; P < .001). Despite surgical diseases making up 30% of the global disease burden, representation of surgeon-scientists among NIH investigators remains less than 2%. Conclusion and Relevance: This study suggests that research performed by surgeon-scientists continues to be underrepresented in the NIH funding portfolio, highlighting a fundamental need to support and fund more surgeon-scientists.

Gender Disparity in National Institutes of Health Funding Among Surgeon-Scientists From 1995 to 2020.

Importance: Surgical diseases account for approximately 30% of the global burden of disease. Gender diversity in biomedical research is critical to generate innovative patient-centered research in surgery. Objective: To examine the distribution of biomedical research funding by the National Institutes of Health (NIH) among women and men surgeon-scientists during a 25-year period. Design, Setting, and Participants: This cross-sectional study used publicly available data from the NIH RePORTER (Research Portfolio Online Reporting Tools: Expenditures and Results) database for research project grants awarded to women and men surgeon-scientists who were principal investigators between 1995 and 2020. Data were retrieved between January 20 and March 20, 2022. The representation of women surgeon-scientists among academic surgeons was compared with the representation of men surgeon-scientists over time. Main Outcomes and Measures: Distribution of NIH funding to women and men surgeon-scientists was examined via 2 metrics: holding a large-dollar (ie, R01-equivalent) grant and being a super principal investigator (SPI) with $750 000 or more in total annual research funding. Statistical analysis was performed between April 1 and August 31, 2022. Results: Between 1995 and 2020, 2078 principal investigator surgeons received funding from the NIH. The proportion of women academic surgeons who were surgeon-scientists remained unchanged during this same period (1995, 14 of 792 [1.8%] vs 2020, 92 of 3834 [2.4%]; P = .10). Compared with their men counterparts, women surgeon-scientists obtained their first NIH grant earlier in their career (mean [SD] years after first faculty appointment, 8.8 [6.2] vs 10.8 [7.9] years; P < .001) and were as likely to obtain large-dollar grants (aRR, 0.99 [95% CI, 0.95-1.03]) during the period 2016 to 2020. Despite this success, women surgeon-scientists remained significantly underrepresented among SPIs and were 25% less likely to be an SPI (aRR, 0.75 [95% CI, 0.60-0.95] during the period 2016 to 2020). Conclusions and Relevance: The findings of this cross-sectional study of NIH-funded surgeons suggest that women surgeons remained underrepresented among surgeon-scientists over a 25-year period despite early career success in receiving NIH funding. This is concerning and warrants further investigation to increase the distribution of NIH funding among women surgeon-scientists.

The geography of talent development.

Geography (i.e., birthplace) is one of many factors that influence talent development. When one's birthplace leads to advantages in sport participation or performance, it is called a birthplace effect. Nearly two decades of committed research has revealed that birthplace effects are pervasive across sports and countries. Recently, researchers have attempted to better understand birthplace effects by considering various metrics that serve as proxies for birth advantages; for instance, population size, population density, and proximity to sport clubs. Underlying mechanisms that explain birthplace effects include infrastructure (e.g., environment and facilities) and social structure (e.g., family and safety), though contextual differences across existing research (e.g., sports and countries) make it difficult to fully explain the effects. Herein, we provide more depth regarding these elements of birthplace effects, while also presenting new data on "talent hotspots"; that is, communities with optimal population and density for talent development.

Effects of intraoperative positive end-expiratory pressure and fraction of inspired oxygen on postoperative oxygenation in dogs undergoing stifle surgery.

OBJECTIVE: To compare the effects of fraction of inspired oxygen (FiO2) with the addition of positive end-expiratory pressure (PEEP) during anesthesia on arterial oxygenation in the first 4 postoperative hours in dogs. We hypothesized that compared with dogs breathing FiO2 ≥ 0.95 and no PEEP (ZEEP), the use of intraoperative PEEP would improve postoperative oxygenation, and that the use of PEEP combined with an FiO2 of 0.4 would further improve it. STUDY DESIGN: Prospective, randomized study. ANIMALS: A total of 30 dogs undergoing unilateral stifle surgery. METHODS: Using a standardized anesthetic protocol, dogs were assigned to either FiO2 ≥ 0.95 and ZEEP, FiO2 ≥ 0.95 and 5 cmH2O PEEP or FiO2 0.4 and 5 cmH2O PEEP. All dogs were mechanically ventilated with a tidal volume of 12 mL kg-1. Dogs breathed room air after recovery from anesthesia. Arterial blood gases were measured during surgical closure and 10, 120 and 240 minutes after extubation. Demographic characteristics were compared with Kruskal-Wallis tests. The effects of treatment and time on the PaO2, PaCO2, PaO2:FiO2 and shunt fraction (F-shunt) were assessed with mixed-effect models. RESULTS: The PaO2 and F-shunt were lower during anesthesia for dogs breathing FiO2 0.4. No differences among groups were measured after extubation for any variable. CONCLUSIONS AND CLINICAL RELEVANCE: Compared with dogs ventilated with FiO2 ≥ 0.95 and ZEEP, application of 5 cmH2O PEEP did not improve intraoperative gas exchange. The combination of 5 cmH2O PEEP and FiO2 0.4 resulted in lower intraoperative F-shunt values. However, no benefits from those maneuvers on postoperative PaO2 and F-shunt were recorded after extubation, suggesting that alterations in pulmonary function imposed by anesthesia were reversed soon after extubation.

The Canine Postamputation Pain (CAMPPAIN) initiative: a retrospective study and development of a diagnostic scale.

OBJECTIVE: To develop a scale to diagnose and assess the severity of postamputation pain (PAP) in dogs. STUDY DESIGN: Single-center retrospective study. ANIMALS: A total of 66 dogs that underwent thoracic or pelvic limb amputation and 139 dogs that underwent tibial plateau leveling osteotomy (TPLO) at a veterinary teaching hospital. METHODS: An online survey regarding postoperative behavioral changes was sent to owners. Categorical, multiple-choice responses were entered into a univariable logistic regression model and tested for association with amputation using the Wald test. If p < 0.2, variables were forwarded to a multivariable logistic regression model for manual build. Model simplicity and predictive ability were optimized using the area under the receiver operating curve (AUROC) characteristic, and model calibration was assessed using the Hosmer-Lemeshow test. The selected model was converted to an integer scale (0-10), the Canine Postamputation Pain (CAMPPAIN) scale. Univariable logistic regression related each dog's calculated score to the probability of PAP. RESULTS: Multivariable logistic regression identified four independent predictors of PAP (p < 0.05): 1) restlessness or difficulty sleeping, 2) episodes of panic or anxiety, 3) sudden vocalization, and 4) compulsive grooming of the residual limb. Score AUROC was 0.70 (95% confidence interval = 0.63-0.78) with good calibration (Hosmer-Lemeshow statistic p = 0.82). A score of 2 corresponded to a risk probability of 0.5. Taking a score ≥ 2 to indicate PAP, score specificity and sensitivity were 92.1% and 36.4%, respectively. When this score was used to diagnose PAP, prevalence was 36.4% (24/66) and 7.9% (11/139) in the amputation and TPLO groups, respectively. CONCLUSIONS AND CLINICAL RELEVANCE: Postamputation pain is characterized by specific postoperative behaviors and appears to affect approximately one-third of canine amputees. The CAMPPAIN scale generated from these data could facilitate diagnosis, treatment and further study of PAP but requires external validation.

Value-based focused global population health management.

In 2018, approximately 18 million people worldwide were diagnosed with cancer and are predicted to double by 2040. The global quality chasm in improving health care worldwide requires "systems thinking" as the key to success. Aligning the goal around person-centered care captures the total needs of care of a population and not just disease categories. The integration of the Institute of Medicine's (IOM) six aims of quality termed "value-based focused" and population health management (PHM) provides all health care leaders grappling with improving the health care of the populations a framework for the communities they serve. In this context, the question becomes finding solutions to providing high quality, compassionate and patient-centered health care delivery. Over the last two decades, three paradigms have emerged; the six aims of quality, outcome-focused population health, and the "Quadruple Aim". We have termed the intersection of these concepts as Value-based focused Population Health Management (VBPHM). This review applies VBPHM across the geographic county and community levels in the United States. Specifically, we examine VBPHM at the county or county-equivalents and community levels within the United States. Lastly, the potential role of Community-based Participatory Research and it is applicability to our framework is discussed. VBPHM can comparably be applied globally to improve population health, especially in preventing and treating cancer better.

Patterns of invasive recurrence among patients originally treated for ductal carcinoma in situ by breast-conserving surgery versus mastectomy.

PURPOSE: Local recurrence after treatment of ductal carcinoma in situ (DCIS) with breast-conserving surgery (BCS) is more common than after mastectomy, but it is unclear if patterns of invasive recurrence vary by initial surgical therapy. Among patients with invasive recurrence after treatment for DCIS, we compared patterns of first recurrence between those originally treated with BCS vs. mastectomy. METHODS: From 2000 to 2016, women with an invasive recurrence occurring ≥ 6 months after initial treatment for DCIS were retrospectively identified. Clinicopathologic features and adjuvant treatment of the initial DCIS, as well as characteristics of first invasive recurrences, were compared between patients who had undergone BCS vs. mastectomy. RESULTS: 452 patients with an invasive recurrence after surgery for DCIS were identified: 367 patients (81%) had initially undergone BCS and 85 patients (19%) mastectomy. Patients originally treated with mastectomy were younger and were more likely to have had high grade, necrosis, and multifocal or multicentric DCIS (p < 0.001) compared with the BCS group. A higher proportion of invasive recurrences were local after BCS (93%; 343/367), whereas 88% (75/85) of recurrences after mastectomy were regional or distant (p < 0.001). The median time to first invasive recurrence was not different between surgical groups (BCS: 6.4 years vs. mastectomy: 5.5 years; p = 0.12). CONCLUSIONS: Among women who experienced a first invasive recurrence after treatment for DCIS, those who had originally undergone mastectomy more commonly presented with advanced disease compared to those treated with BCS, likely related to the absence of the breast and the higher risk profile of their initial DCIS.

An Analgesic Regimen for Opioid Reduction in Elective Plastic Surgery: A Randomized Prospective Study.

BACKGROUND: Prescription opioid misuse has been recognized as a national epidemic. The implications of this problem are especially important to consider, as postoperative opioid abuse can give rise to true addiction for surgical patients. The concept of enhanced recovery after surgery is increasingly used across various specialties to decrease the overabundance of postoperative opioid use. METHODS: This study prospectively examined 143 patients undergoing cosmetic elective surgery. Patients were randomized into one of two groups based on postoperative pain management regimen: multimodal (enhanced recovery after surgery) analgesia or traditional opioid analgesia. Data regarding postoperative pain scores, amount of postoperative opioids consumed, and duration of postoperative pain pill use were analyzed. RESULTS: Multimodal (enhanced recovery after surgery) regimen patients experienced a 13.0 percent reduction in their pain scores after admission to the postanesthesia care unit and a 34.2 percent reduction in pain score at discharge, compared with traditional opioid patients (p = 0.049 and p = 0.0036, respectively). Enhanced recovery after surgery patients experienced a 35 percent reduction in the number of pills taken in the postoperative period and an 18.4 percent reduction in the duration of consumption (p = 0.0007 and p = 0.0539, respectively). CONCLUSIONS: The results demonstrate that multimodal postoperative pain management is an important tool for decreasing the amount of opioids prescribed and needed in the postoperative period. The overprescribing of opioids after surgery is a precursor to abuse and the increase in the national opioid reservoir. CLINICAL QUESTION/LEVEL OF EVIDENCE: Therapeutic, II.

Precaution Costs: The Presumption of Breast Cancer Seeding and Its Impact on Surgical Expenditure.

As healthcare costs continue to rise at unsustainable rates (at an average rate of 5.5% a year), expenses without measurable outcomes need review.1 In reconstructive surgery, empiric change of instruments between oncologic and reconstructive segments of surgery is one such practice. Breast surgery for ductal carcinoma in situ (DCIS), prophylaxis, and partial extirpation has little possible increase in seeding or implantation risk based on the literature. With undue extrapolation from higher risk cancers (such as ovarian), preventative practices of changing out trays, re-gloving, re-gowning, re-preparing, and re-draping between phases persist in operating rooms across the country. From real case costs, the additional expense of 2 surgical setups in the United States is conservatively estimated at $1232 per case, or over $125 million per year for this theoretical risk. Using implantation risk for core breast biopsies as a denominator, this cost is $1.65-$5.8 million per potential recurrence. This is an unacceptably high cost for hypothetical recurrence risk reduction, especially one that does not impact survival outcomes.

Do Body Mass Index and Breast Density Impact Cancer Risk Among Women with Lobular Carcinoma In Situ?

PURPOSE: Both body mass index (BMI) and breast density impact breast cancer risk in the general population. Whether obesity and density represent additive risk factors in women with lobular carcinoma in situ (LCIS) is unknown. METHODS: Patients diagnosed with LCIS from 1988 to 2017 were identified from a prospectively maintained database. BMI was categorized by World Health Organization classification. Density was captured as the mammographic Breast Imaging Reporting and Data System (BIRADS) value. Other covariates included age at LCIS diagnosis, menopausal status, family history, chemoprevention, and prophylactic mastectomy. Cancer-free probability was estimated using the Kaplan-Meier method, and Cox regression models were used for univariable and multivariable analyses. RESULTS: A total of 1222 women with LCIS were identified. At a median follow-up of 7 years, 179 women developed breast cancer (121 invasive, 58 ductal carcinoma in situ); 5- and 10-year cumulative incidences of breast cancer were 10% and 17%, respectively. In multivariable analysis, increased breast density (BIRADS C/D vs. A/B) was significantly associated with increased hazard of breast cancer (hazard ratio [HR] 2.42, 95% confidence interval [CI] 1.52-3.88), whereas BMI was not. On multivariable analysis, chemoprevention use was associated with a significantly decreased hazard of breast cancer (HR 0.49, 95% CI 0.29-0.84). Exploratory analyses did not demonstrate significant interaction between BMI and menopausal status, BMI and breast density, BMI and chemoprevention use, or breast density and chemoprevention. CONCLUSIONS: Breast cancer risk among women with LCIS is impacted by breast density. These results aid in personalizing risk assessment among women with LCIS and highlight the importance of chemoprevention counseling for risk reduction.

Effect of Keller Funnel on the Rate of Capsular Contracture in Periareolar Breast Augmentation.

BACKGROUND: Capsular contracture is 1 of the most common complications after breast implant surgery and is a major indication for reoperation. Capsular contracture is believed to be a multifactorial process that is affected by implant texture, incision type, and ultimately pocket contamination. This contamination causes a biofilm that leads to capsular contracture. The intraoperative use of a Keller funnel is a mechanical way to decrease the implant's contact with the skin and ducts, reducing bacterial contamination that can cause these biofilms. For this reason, periareolar breast augmentation has been less popular among surgeons. The purpose of this study was to examine if there was a significant difference between the rates of capsular contracture in patients having periareolar breast augmentations with the use of a Keller funnel for insertion and those having periareolar breast augmentations without Funnel use. METHODS: This level 3 retrospective study followed 2 groups of patients, the first having periareolar breast augmentations without the use of a funnel for insertion (group A; patients n = 15; implants n = 30) and the second having periareolar breast augmentations with the use of a funnel for insertion (group B; patients n = 151; implants n = 300). RESULTS: The rate of capsular contracture in group A was found to be 10% compared with a rate of capsular contracture of 1.3% for patients in group B, an 87% reduction (P = 0.0019). CONCLUSIONS: According to the results found in this study, the rate of capsular contracture in patients having periareolar breast augmentations after insertion with a Keller funnel was statistically significantly lower than the rate in patients having implants inserted without the assistance of a funnel, making the device useful in reducing the occurrence of postoperative capsular contracture.

The "3-Pack" Examination Is Critical for Comprehensive Evaluation of the Biceps-Labrum Complex and the Bicipital Tunnel: A Prospective Study.

PURPOSE: To determine the diagnostic value of the 3-Pack examination for biceps-labrum complex (BLC) disease, assess interobserver reliability, and generate an evidence-based diagnostic and therapeutic algorithm. METHODS: A total of 145 consecutive patients were enrolled in this prospective comparative study. The study included 116 chronically symptomatic patients indicated for arthroscopic subdeltoid transfer of the long head of the biceps tendon to the conjoint tendon and 29 asymptomatic comparison subjects. Each patient underwent examination that included the 3-Pack (active compression test [O'Brien sign], throwing test, and bicipital tunnel palpation) and traditional examination (Speed test; Yergason test; full can test; empty can test) in a blinded, randomized fashion by 3 investigators. Intraoperative BLC disease was prospectively categorized by location (inside, junctional, or bicipital tunnel). RESULTS: 3-Pack tests were highly sensitive (73% to 98%), but less specific (46% to 79%) for BLC in all 3 locations than some of the traditional tests, which were less sensitive (20% to 67%), but more specific (83% to 100%) for BLC disease in all 3 locations. With regard to hidden bicipital tunnel lesions, palpation and O'Brien sign were highly sensitive (97.8% and 95.7% respectively) and revealed high negative predictive value (NPV, 96.4% and 92.6% respectively). Speed and Yergason tests, conversely, were poorly sensitive but had high specificities (86.7% and 97.9%, respectively) and positive predictive value (76% and 92.3%, respectively). Inter-rater reliabilities were substantial to almost perfect for the 3-Pack examination (kappa 70% to 85%) and fair to moderate for the 4 traditional examinations (kappa 25% to 56%). CONCLUSIONS: The 3-Pack has excellent inter-rater reliability, sensitivity, and NPV and is a critical screening tool for BLC disease in all zones. Hidden extra-articular bicipital tunnel disease can reliably be excluded based on negative tenderness to palpation or a negative O'Brien sign (NPV 93% to 96%). LEVEL OF EVIDENCE: Level III, case control study.