Carbon Footprint of Open Carpal Tunnel Release Surgery Performed in the Procedure Room Versus Operating Room Setting.

PURPOSE: Environmental sustainability is an important issue in health care because of large amounts of greenhouse gases attributable to hospitals. The operating room has been highlighted as one of the highest contributors, prompting several initiatives by organizations focused on the care of hand and upper extremity conditions. This study aimed to quantify and compare the carbon footprint of a common hand surgery in two different surgical settings, the procedure room (PR) and operating room. We hypothesized that open carpal tunnel release (oCTR) will generate a greater environmental impact in the operating room than in the PR. METHODS: This was a retrospective review of oCTRs performed at a tertiary care medical center. Current procedural technology codes isolated a single cohort of patients who underwent bilateral oCTR, one side performed in the PR and the contralateral side in the operating room. Current published emission conversions were used to calculate carbon footprint at our institution based on energy expenditure necessary for the creation and disposal of waste and sterilization of surgical equipment. Surgery time was combined with heating, ventilation and air conditioning/lighting energy consumption to estimate facility emissions. RESULTS: Fourteen patients had bilateral oCTR surgery performed in both settings. Open CTR performed in the operating room generated 3.7 kg more solid waste than when performed in the PR. In total, emissions from oCTR performed in the operating room generated 32.4 kg CO2, whereas oCTR in the PR emitted 13.0 kg CO2 per surgery. CONCLUSIONS: Performing a common hand procedure (oCTR) is more environmentally sustainable in the PR than in the operating room, with a 60% reduction in carbon footprint. CLINICAL RELEVANCE: Greater effort should be made to perform surgery in the PR instead of the operating room in appropriately indicated patients. Surgical sets should be evaluated for the necessity of included equipment and unnecessary waste.

Motivations and Barriers for Women Orthopaedic Surgeons Considering Arthroplasty Fellowship.

BACKGROUND: Arthroplasty is one of the least gender-diverse orthopaedic subspecialties. While previous studies have looked at factors influencing fellowship choices for women, few studies have attempted to understand the decision for or against arthroplasty specifically. Working to better understand fellowship choice is a critical step in the process of increasing women recruitment. METHODS: An anonymous survey was distributed using REDCap to women orthopaedic surgeons and trainees through listservs, social media groups, and residency programs. Surgeons who had decided on a specific subspecialty or already completed fellowship were included. Responses were obtained from 164 surgeons (72 arthroplasty surgeons, 92 other subspecialties). Chi-squared and Fisher's Exact tests were then performed. RESULTS: The most important factor for those who chose arthroplasty was enjoyment of the surgeries. The biggest concerns from those in the arthroplasty group about the field were work-life balance, ability to become pregnant and/or have a healthy pregnancy, and sex bias from referring physicians. Of those who ultimately chose another subspecialty, 30.4% considered arthroplasty "a little" and 8.7% considered it "strongly." The most important dissuaders for the group that considered arthroplasty were concerns about "boy's club" culture, concerns about the physicality of the surgeries, and a lack of mentors. CONCLUSION: While the decision to choose a career path is multifactorial, our hope is that through the identification of modifiable factors we can increase women representation in arthroplasty. Increasing mentorship, implementing practical solutions to improve work-life balance, supporting healthy pregnancies, and mitigating the physical demands of surgery could help address current disparities.

Drop landing analysis of rotational osteotomies.

Pathomechanics resulting from rotational deformities of the long bones in an idiopathic population have not been extensively studied, and are chiefly limited to level over ground walking. Thirty-five adolescents with excessive idiopathic outward tibial torsion (TT), femoral rotation, or both (pan genu) were studied both before and after corrective surgery. Data collected included computational motion analysis of a drop jump and patient-reported outcomes consisting of PODCI and Goal Attainment Scores. Results were compared to an age-matched typically developing cohort (n = 25). Subjects with femoral anteversion (FA) exhibited compensatory hip rotations to normalize knee progression angles at landing. Subjects with only TT did not compensate at the hip, landing with typical knee progression but excessive outward foot progression. These strategies resulted in elevated frontal plane knee moments for FA (P = 0.008), and elevated lateral knee forces in all groups compared to typical, with the TT group reaching significance (P < 0.001). Rotational osteotomies successfully restored elevated kinematics and kinetics to within or below typically developing ranges. Patient-reported outcomes generally improved after surgery across all domains studied. Drop jump testing elucidated compensation strategies employed by these cohorts. Compensation did not fully alleviate elevated forces at the knees. Surgical intervention normalized pathokinematics and pathokinetics, reduced pain, and improved patients' perception of their functional abilities. Greater improvements were found in individuals in the two groups with FA compared to the group with TT only.

Is Cooled Radiofrequency Genicular Nerve Block and Ablation a Viable Option for the Treatment of Knee Osteoarthritis?

BACKGROUND: The purpose of this study was to determine demographic and psychosocial factors that influence the effectiveness of cooled radiofrequency genicular nerve ablation (C-RFA) and block in patients with chronic knee pain secondary to osteoarthritis (OA). METHODS: A retrospective review was completed including patients with knee OA who underwent genicular nerve ablation or block or both. Patient information collected included opioid use, psychological comorbidities, smoking history, body mass index, and medical comorbidities. Success was defined using the Osteoarthritis Research Society International criterion of greater than or equal to 50% reported pain relief from the procedure. Patients without a diagnosis of knee OA and patients with ipsilateral total knee arthroplasty were excluded. Patient factors were compared between (1) those that did or did not respond to the initial block and (2) those that did or did not respond to C-RFA. RESULTS: Of the 176 subjects that underwent genicular nerve block, 31.8% failed to respond to the procedure. Subjects that failed the initial block were significantly more likely to have psychological comorbidities, smoking history, and diabetes. Of the subjects that proceeded to genicular nerve ablation, 53.7% reported less than 50% pain relief, and 46.3% reported pain relief greater than or equal to 50% at the first follow-up visit. While the presence of psychological comorbidities, smoking, and diabetes were associated with first-stage block failures, these patient factors were not associated with second-stage ablation failures. CONCLUSIONS: C-RFA may be an effective adjunct therapy as part of a multimodal pain regimen; however, individual patient characteristics must be considered.

Neurotropic Lineage III Strains of Listeria monocytogenes Disseminate to the Brain without Reaching High Titer in the Blood.

Listeria monocytogenes is thought to colonize the brain using one of three mechanisms: direct invasion of the blood-brain barrier, transportation across the barrier by infected monocytes, and axonal migration to the brain stem. The first two pathways seem to occur following unrestricted bacterial growth in the blood and thus have been linked to immunocompromise. In contrast, cell-to-cell spread within nerves is thought to be mediated by a particular subset of neurotropic L. monocytogenes strains. In this study, we used a mouse model of foodborne transmission to evaluate the neurotropism of several L. monocytogenes isolates. Two strains preferentially colonized the brain stems of BALB/cByJ mice 5 days postinfection and were not detectable in blood at that time point. In contrast, infection with other strains resulted in robust systemic infection of the viscera but no dissemination to the brain. Both neurotropic strains (L2010-2198, a human rhombencephalitis isolate, and UKVDL9, a sheep brain isolate) typed as phylogenetic lineage III, the least characterized group of L. monocytogenes Neither of these strains encodes InlF, an internalin-like protein that was recently shown to promote invasion of the blood-brain barrier. Acute neurologic deficits were observed in mice infected with the neurotropic strains, and milder symptoms persisted for up to 16 days in some animals. These results demonstrate that neurotropic L. monocytogenes strains are not restricted to any one particular lineage and suggest that the foodborne mouse model of listeriosis can be used to investigate the pathogenic mechanisms that allow L. monocytogenes to invade the brain stem.IMPORTANCE Progress in understanding the two naturally occurring central nervous system (CNS) manifestations of listeriosis (meningitis/meningoencephalitis and rhombencephalitis) has been limited by the lack of small animal models that can readily distinguish between these distinct infections. We report here that certain neurotropic strains of Listeria monocytogenes can spread to the brains of young otherwise healthy mice and cause neurological deficits without causing a fatal bacteremia. The novel strains described here fall within phylogenetic lineage III, a small collection of L. monocytogenes isolates that have not been well characterized to date. The animal model reported here mimics many features of human rhombencephalitis and will be useful for studying the mechanisms that allow L. monocytogenes to disseminate to the brain stem following natural foodborne transmission.

Pulling the Trigger: Recommendations for Surgical Care of the Pediatric Trigger Thumb.

BACKGROUND: Despite being a common pediatric hand condition, there are few clear guidelines regarding the optimal management of pediatric trigger thumb. Our primary aim was to help guide surgical management of this disorder by establishing a treatment algorithm on the basis of our institution's experience. METHODS: This is an institutional review board-approved retrospective study of all patients with idiopathic trigger thumbs from 2005 to 2015 at a single institution. Demographics and treatment course were recorded for all patients including duration of follow-up, observation, surgical intervention, and complications. All children were classified according to the Sugimoto classification. RESULTS: A total of 149 patients with 193 thumbs met inclusion and exclusion criteria. 16.5% of patients had stage II thumbs, 10.3% of patients with stage III, and 73% of patients with stage IV thumbs. Of all patients with stage IV thumbs, 3.5% were locked in extension for an overall incidence of 2.6%.In total, 46% of patients failed observation and underwent surgical treatment. Only 14% of stage IV trigger thumbs resolved when observed, compared with 53% of stage II and 25% of stage III trigger thumbs. Stage IV thumbs were 4.6 times more likely to fail conservative treatment and go on to surgery than stage II or III thumbs (odds ratio, 4.6; P=0.006).Thirty-two percent of patients underwent surgery without an observation period. Older children with bilateral stage 3 thumbs were the most likely to go straight to the odds ratio instead of being observed (P=0.002, r=0.17).Of the total amount of patients who underwent surgery (116), there were 4 complications for a rate of 3.4% with a recurrence rate of 1.7%. CONCLUSIONS: On the basis of the data in this study, the authors would recommend that stage IV thumbs undergo surgery without an observational period. Second, stage II and stage III thumbs can be safely observed for at least 1 year before surgery. Finally, our study concurs with the literature that surgery can be successful with low rates of complications and recurrence. LEVEL OF EVIDENCE: Level IV.

Is It Growth or Natural History? Increasing Spinal Deformity After Sanders Stage 7 in Females With AIS.

BACKGROUND: Accurate prognosis and treatment decisions in adolescent idiopathic scoliosis (AIS) demand a reliable radiographic marker of growth cessation. Specifically, Sanders Stage 7 (SS7) is a useful marker of spine growth cessation in females and is proposed as a bracing endpoint. The purpose of this study was to determine the amount of curve progression noted in female individuals with AIS after achieving SS7. We hypothesize that a subset of patients continues to progress at a greater rate than the natural history at SS7. METHODS: This retrospective review included female patients with AIS treated at a single institution from May 2008 to 2018. Patients required a hand radiograph demonstrating SS7 and concurrent spine radiograph measuring <50 degrees, plus 2-year follow-up spine radiograph. Curve types were categorized by the modified Lenke Classification. Risser grade, menarche, height, weight, and bracing data were collected. Progression was defined as an increase of the main curve ≥5 degrees. Comparison between groups was analyzed using independent t tests and χ or Fisher exact tests as appropriate. Binary logistic regressions were used to construct a model predictive of progressing beyond 50 degrees or undergoing surgery. RESULTS: A total of 89 patients met inclusion criteria, average main curve magnitude 33 degrees (SD 9) at SS7 and 38 degrees (SD 11) at 2-year follow-up. Forty-five (51%) patients progressed ≥5 degrees and 17 (19%) progressed at least 10 degrees. Seventy patients had curves <40 degrees at SS7 and 22 (31%) progressed to >40 degrees at 2 years. Eleven (12%) patients progressed to >50 degrees or had surgery at 2-year follow-up. Receiver operating characteristic curve analysis identified a threshold of 39.5 degrees curvature at SS7 associated with progression to >50 degrees or surgery (area under the curve=0.94, P<0.001, sensitivity=100%, specificity=87%). Patients with initial curves >40 degrees did have additional height gained (2.1 cm; SD 1.5), but this was not different than those <40 degrees, P>0.05. In addition, no other variables had statistically significant association with those that progressed (P>0.05). CONCLUSIONS: A curve >40 degrees at SS7 is at high risk for progressing to a curve measuring >50 degrees or requiring surgery. Those with curves below this threshold still have potential to make clinically significant progression after skeletal maturity. Follow-up of patients beyond SS7 is essential for curves measuring >40 degrees. Reaching SS7 with a curve <50 degrees may not be the endpoint for curve progression, even if predictive of the end of spinal growth. LEVEL OF EVIDENCE: Level III-retrospective research study.