Correlation Between Rotator Cuff Tear in Thai Urban Elderly Population and Vitamin D Deficiency.

Background The benefits of vitamin D encompass the augmentation of rotator cuff healing, the enhancement of bone mineral density (BMD), and the fortification of skeletal muscle strength. The vitamin D deficiency in Asian countries appears to be more severe compared to their Western counterparts. This study aims to ascertain the relationship between rotator cuff tears and vitamin D levels in the urban Thai elderly demographic. Our hypothesis posits that vitamin D deficiency will exhibit an association with the occurrence of rotator cuff tears. Materials and methods A prospective clinical trial conducted at a single tertiary was carried out to assess the patients experiencing shoulder pain who were aged 60 years or older. All participants were tested of blood specimens for calciferol concentration and magnetic resonance imaging (MRI). The duration between blood sample collection and magnetic resonance imaging (MRI) did not exceed a two-week window. The assessment of fatty degeneration in the supraspinatus, infraspinatus, and subscapularis muscles, as well as tear dimensions and cartilage thickness, was conducted using magnetic resonance imaging within the outpatient clinic. Results The analysis of serum vitamin D levels within a cohort comprising 59 subjects produced significant observations, indicating that 20.03% of the participants manifested a deficiency in vitamin D and 44.07% exhibited insufficiency in vitamin D levels. There was no observed correlation between serum vitamin D levels and various patient parameters, including age (P = .99), body mass index (P = 0.31), tear size (P = 0.41), cartilage thickness at different locations on the humeral head (superior, middle, inferior, and total) (P = 0.31, 0.40, 0.26, 0.20, respectively), degree of fatty infiltration of the rotator cuff (P = 0.81), and severity of the rotator cuff condition (P = 0.13). A significant positive correlation was established between rotator cuff tear size and both the severity of the rotator cuff condition (P < 0.001) and the degree of fatty infiltration of the cuff (P < 0.001). Conclusion A negative correlation is observed between serum vitamin D levels and various parameters, including tear size, fatty infiltration, cartilage thickness, and the severity of rotator cuff tears within the elderly urban Thai population. To affirm these findings, it is imperative to conduct additional research and integrate vitamin D assessments into the management strategies for aging populations with rotator cuff conditions.

The biomechanical properties of the hook plate and pull-out suture in mallet finger fractures: a cadaveric study.

A total of 32 cadaveric fingers with bony mallet injuries were fixed using either the hook plate or the pull-out suture technique. The purpose of this study was to assess the immediate postoperative biomechanical responses of the fixation techniques under different load conditions. The fingers were cyclically loaded with a force of 7 N for 3500 cycles and until construct failure. The maximum displacements of the hook plate and pull-out sutures were 0.7 mm and 0.6 mm, respectively (p = 0.556). The stiffnesses of the hook plate and pull-out suture were 1.3 N/mm and 1.1 N/mm, respectively (p = 0.515). The ultimate loads-to-failure for the hook plate and pull-out suture were 64.4 N (interquartile range [IQR] 37.7-77.7) and 44.5 N (IQR 29.7-63.5), respectively (p = 0.094). Both fixation techniques were able to withstand immediate postoperative mobilization without any difference in fracture displacement, construct stiffness or maximum load to failure.

Efficacy and Safety of Antibiotic Impregnated Microporous Nanohydroxyapatite Beads for Chronic Osteomyelitis Treatment: A Multicenter, Open-Label, Prospective Cohort Study.

Chronic osteomyelitis is still a serious health problem that causes disabling conditions and has an impact on the quality of life. The objective of this study was to determine the clinical efficacy and safety of localized antibiotics delivery via impregnated microporous nanohydroxyapatite (nHA-ATB) beads for chronic osteomyelitis treatment. A total of 62 patients were enrolled in this study. After radical surgical debridement, the bone defect was filled with three types of antibiotics (vancomycin or gentamicin or fosfomycin) impregnated HA beads. The follow-up period was 48 weeks. It was found that the success rate was approximately 98% with a re-infection in only one patient. Quality of life of all patients after treatment improved significantly over time. Systemic exposure to vancomycin and gentamicin after beads implantation was limited and high local antibiotics concentrations were found in wound drainage fluid at 24, 48 and 72 h. Blood biochemistry measurements did not show any nephrotoxic or hepatotoxic effects. 20 adverse events were reported, but 90% of the events were resolved without having to remove the beads and the patients recovered. Satisfactory outcomes were observed in terms of success rate, quality of life and adverse effect. nHA-ATB beads impregnated by vancomycin or gentamicin or fosfomycin could potentially be employed as an alternative product of choice for localized antibiotics delivery in chronic osteomyelitis treatment.

Comparison of the effect of ketorolac versus triamcinolone acetonide injections for the treatment of de Quervain's tenosynovitis: a double-blind randomized controlled trial.

BACKGROUND: De Quervain's disease is tenosynovitis of the first dorsal compartment causing severely painful radial-side wrist pain and impaired function. Steroids are effective in treating this condition due to their anti-inflammatory properties. However, this drug causes problems such as hypopigmentation, and is contradicted in diabetes mellitus patients. Non-steroidal anti-inflammatory drug (NSAID) which are efficacious in shoulder pathology and not contraindicated in diabetics and can be used to avoid the local effects of steroids could be beneficial for some patients. The present study was a randomized controlled trial to examine the differences in pain scores and functional response to local injections of a corticosteroid and the NSAID ketorolac. METHODS: Sixty-four patients with radial styloid tenosynovitis were randomized using a computer-generated random number table into two groups receiving either a ketorolac injection or a triamcinolone injection. We evaluated post-injection pain intensity using a verbal numerical rating scale (VNRS), functional outcomes using the Thai Disabilities of the Arm, Shoulder and Hand (DASH) scale, and evaluated grip and pinch strengths, recorded at baseline and 6 weeks after the injection. RESULTS: Thirty-one participants in the ketorolac group and 29 participants in the triamcinolone group completed the study and were included in the analysis. There were no significant differences in the assessments at baseline. At the 6-week conclusion of the study, patients in the triamcinolone group had a statistically lower average pain score than in the ketorolac group (0.7 ± 2.0 vs 5.3 ± 3.2, P < 0.001), higher DASH functional score (4.4 ± 6.5 vs 34.1 ± 20.2, P < 0.001), higher right grip strength (60.8 ± 16.8 vs 49.2 ± 18.6, P < 0.015), and higher left grip strength (59.8 ± 18.1 vs 50.3 ± 18.0, P < 0.04). However, there was no difference in pinch strength. CONCLUSIONS: Our study found that ketorolac injections resulted in inferior pain reduction, functional score and grip improvement than triamcinolone injection in patients with radial styloid tenosynovitis. Future studies are required to examine the effects of ketorolac in larger group and with longer follow-up periods to further elucidate the findings of this study. TRIAL REGISTRATION: The study was registered at Clinicaltrials.in.th (TCTR20200909006).

Risk of Radial Nerve Injury in Anterolateral Humeral Shaft Plating.

PURPOSE: The purpose of this study was to evaluate and compare the risk of iatrogenic radial nerve injury between arm positionings of 45° and 60° abduction in anterolateral humeral plating using a 4.5-mm narrow dynamic compression plate. METHODS: Fifty-six humeri of cadavers in the supine position with 45° of arm abduction were exposed through the anterolateral approach. A hypothetical fracture line was marked at the middle of the humerus, and a precontoured ten-hole 4.5-mm narrow dynamic compression plate was applied and fixed to the anterolateral surface. After the fixation, the radial nerve was exposed through a triceps-splitting approach. Screws in contact with or which had penetrated the radial nerve were deemed to be injuries. Then, the screws and plate were removed, the arm changed to the 60° arm abduction position, and the steps of applying the plate and inserting the screws were followed as in the 45° arm abduction step. RESULTS: The screws which could potentially injure the radial nerve were those of the second to sixth screw holes in both the 45° and 60° of arm abduction positions. The incidences of iatrogenic radial nerve injury of the second to sixth screw holes in the 45° position were 5.36%, 39.29%, 80.36%, 60.71%, and 10.71%, respectively, and at the 60° position were 5.36%, 53.57%, 83.93%, 60.71%, and 7.14%, respectively. There were no statistically significant differences in risk of injury between the two positions in all screw holes (all P-values > 0.05). DISCUSSION: In anterolateral humeral shaft fixation, arm abduction position did not affect the risk of iatrogenic radial nerve injury, with the main risk from certain screw holes. The surgeon should be careful in screw insertion, especially at the fourth and fifth screw holes. LEVEL OF EVIDENCE: IV; cadaveric study.

Cross-cultural adaptation and validation of the Thai version of the functional index for hand osteoarthritis (FIHOA).

BACKGROUND: The Functional Index for Hand Osteoarthritis (FIHOA) is a simple tool to assess functional impairment for hand OA patients. The purpose of this study was to translate the FIHOA into the Thai language, and validate it in Thai hand OA patients. METHODS: The FIHOA was translated into Thai (T-FIHOA) according to the principles of cross-cultural adaptation and administered to 102 hand OA patients recruited between September 2020 and July 2021 together with the modified Health Assessment Questionnaire (mHAQ), Disabilities of the Arm, Shoulder and Hand (DASH), and visual analogue scale (VAS) for hand pain. Spearman's correlation coefficient and intraclass correlation coefficient (ICC) were used to check the test-retest reliability of each item and the total scores in the translated questionnaire. The internal consistency reliability was evaluated using Cronbach's alpha. The external construct validity was assessed using correlations between the T-FIHOA, mHAQ, DASH and hand pain VAS. RESULTS: The T-FIHOA had a unidimensional structure. The ICC was > 0.9 and the Cronbach's alpha of 0.92 indicated excellent reliability and internal consistency, respectively. The external validity tests indicated moderate correlation with the hand pain VAS (r = 0.37, P <  0.01) and moderate to strong correlations with the mHAQ (r = 0.63, P <  0.01), and DASH score (r = 0.52, P <  0.01). The T-FIHOA had the highest effect size (ES) and standardized response mean (SRM) (- 0.37 and - 0.58 respectively) among all questionnaires except for the VAS when assessing changes between baseline and week 4. CONCLUSIONS: The T-FIHOA is a good and reliable assessment tool freely available for practitioners/researchers to evaluate functional impairment in Thai hand OA patients.

Multiple carpometacarpal joint fracture-dislocation from the second to fifth: A case report.

Introduction: and importance: Herein we present a rare case of multiple second to fifth carpometacarpal joint fracture-dislocations. It is important in such cases to be aware of a high-velocity impact etiology of the fractures, which will ensure proper imaging, diagnosis and treatment. Case presentation: A 34-year-old male presented with severe pain in his left hand following a motorcycle accident. He was diagnosed as multiple second to fifth carpometacarpal joint fracture-dislocations. He was successfully treated with closed reduction with multiple Kirshner wires fixation under general anesthesia. A one-year follow up confirmed excellent clinical results. Clinical discussion: There are various surgical options including casting, closed reduction and percutaneous pinning (CRPP), and open reduction internal fixation, however, the optimal treatment is still controversial. The closed reduction is recommended in all CMC joint dislocations. Adding a K-wire fixation can create a secure fixation and achieve an excellent outcome. Conclusion: Multiple carpometacarpal joint fracture-dislocations is a very rare injury. Careful clinical examination is important for an accurate diagnosis and plain radiographic studies are necessary. Standard fracture dislocation treatment can be used. Simple closed reduction with the K-wires fixation technique is easy to perform and in our case achieved successful treatment in terms of clinical and radiographic outcomes.

Effectiveness of surgical interventions for treating de Quervain's disease: A systematic review and meta-analysis.

Introduction: This systematic review of randomized controlled trials was undertaken to assess whether any of the various currently used surgical interventions have better functional outcomes and less impairment or fewer surgical complications compared to the other common surgical interventions in de Quervain's disease. Material and methods: Relevant studies related to surgical interventions in de Quervain's disease based on the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) reporting guidelines were identified from PubMed, Embase, Web of Science, and the Cochrane Central Register of Controlled Trials for randomized controlled trials comparing surgical interventions in de Quervain's disease published from January 2000 to December 2020. Functional outcome and impairment were the primary outcomes assessed. Results: Three trials met the eligibility criteria which were following randomized controlled trial or quasi-experimental trial enrolling adults ≥18 years of age diagnosed with de Quervain's disease, comparing clinical outcomes between different surgical interventions, and including functional outcomes, impairment, pain and complications data. The Cochrane Risk of Bias Assessment Tool and GRADE approach were used to ascertain methodological quality. Statistical heterogeneity was tested with I-square and chi-square tests. The longitudinal skin incision probably slightly reduced superficial radial nerve injury, vein injury, scar hypertrophy, and total complications compared with the transverse skin incision with relative risk: 0.14, very low certainty by GRADE; 0.10, very low certainty by GRADE; 0.57, very low certainty by GRADE; and 0.23, very low certainty by GRADE, respectively. Conclusion: Concerning the analysis of functional and pain scores, no significant results were able to be concluded. This study's findings must be considered in the light of quality and sample size limitations, and further high quality prospective randomized controlled clinical trials are needed to draw more firm conclusions.

The risk of iatrogenic radial nerve and/or profunda brachii artery injury in anterolateral humeral plating using a 4.5 mm narrow DCP: A cadaveric study.

INTRODUCTION: Fixation of humeral shaft fractures with a plate and screws can endanger the neurovascular structure if proper care is not taken. No studies to our knowledge have studied the risk of iatrogenic radial nerve and/or profunda brachii artery (RNPBA) injury from each screw hole of a 4.5 mm narrow dynamic compression plate (narrow DCP). The purpose of this study is to evaluate the risk of RNPBA injury in anterolateral humeral plating with a 4.5 mm narrow DCP. MATERIAL AND METHODS: 18 humeri of 9 fresh-frozen cadavers in the supine position were exposed via the anterolateral approach with 45 degrees of arm abduction. A hypothetical fracture line was marked at the midpoint of each humerus. A precontoured ten-hole 4.5mm narrow DCP was applied to the anterolateral surface of the humerus using the fracture line to position the center of the plate. All screw holes were drilled and screws inserted. The cadaver was then turned over to the prone position with 45 degrees of arm abduction, and the RNPBA exposed. The holes through in which 100% of the screw had contact with or penetrated the RNPBA were identified as dangerous screw holes, while lesser percentages of contact were defined as risky. RESULTS: The relative distance ratios of the entire humeral length from the lateral epicondyle of the humerus to the 4th, 3rd, 2nd and 1st proximal holes were 0.64, 0.60, 0.56 and 0.52, respectively. The most dangerous screw hole was the 2nd proximal, in which all 18 screws had contacted or penetrated the nerve, followed by the risky 1st (12/18), 3rd (8/18) and 4th (2/18) holes. CONCLUSION: In humeral shaft plating with the 4.5mm narrow DCP using the anterolateral approach, the 2nd proximal screw hole carries the highest risk of iatrogenic radial nerve and/or profunda brachii artery injury.

Comparing the effectiveness of blended learning and traditional learning in an orthopedics course.

INTRODUCTION: The ongoing COVID-19 pandemic is forcing medical schools to replace substantial parts of the traditional lecture method with online formats to maintain social distancing guidelines and reduce face-to-face contact in the classroom. To our knowledge, there have to date been few studies comparing the effectiveness of traditional teaching with blended teaching based on the students' final grades which the efficacy of online learning is still controversial, and this study aimed to compare the efficacy of blended teaching with conventional teaching in an orthopedics course. METHODS: This study was a retrospective cohort study based on data collected from fifth-year medical students between April 2019 and March 2021. The students were divided into two groups which based on years of study. The summative assessment was based on summing the MCQs plus KFs, the MEQ plus oral exam, OSCE, simulated patient chart reviews, and OPD work. All students took the same end-of-course quizzes with no differences between the groups regarding the kinds of knowledge tested. The results of these quizzes were used to compare the effectiveness of the conventional teaching in 2019 and the blended teaching in 2020. The paired t-test was used to analyze the data. RESULTS: A total of 252 students were enrolled in the study, of whom 128 and 124 students were in the traditional teaching group or blended teaching groups, respectively. The grade point averages of the students were 3.2 ± 0.4 and 3.3 ± 0.4 in 2019-2020 and 2020-2021, respectively, without significant difference (p-value = 0.06). The scores in the blended learning group were higher than in the traditional learning group in all assessment tools (MCQ, KF, Oral, and OSCE scores) except the MEQ. CONCLUSIONS: Blended learning was not less effective than traditional learning for teaching medical students.

Relationship between web-based illness scripts and the performance of medical students in orthopedic surgery placements.

OBJECTIVES: We aimed to explore the relationship between web-based orthopedic illness scripts and medical students' performance as assessed through examination results. METHODS: This was a retrospective cohort study with 83 fifth-year medical students in an academic hospital. During a one-month placement, they were instructed to do web-based illness scripts. Their performances were assessed by examination in the last week. All recorded data about illness scripts and examination results were retrieved. The students were separated into high and low response groups based on completed illness scripts. The characteristics of the students between the two groups were compared. Pearson correlation coefficients and regression analysis were used to identify the relationship between illness scripts and examination results. RESULTS: There were 56 students in the high-response and 27 in the low-response groups. The characteristics and examination scores were not significantly different between the groups, while there was a significant difference in script completion (t(27)=13.72, p<0.001). Using Pearson correlation, we found weak correlations without significance between completed scripts, illness script scores, and examination scores. We found no relationship between illness script scores and examination scores, even in the high response group, by regression analysis. CONCLUSIONS: The use of web-based orthopedic illness scripts did not correlate to the examination performance of medical students. A high number of scripts without variety and limited time for practicing may have obscured potential positive relationships. Illness scripts should be adjusted as appropriate for each school before being assigned. A further multi-center, prospective study is suggested to identify the correlations and investigate the influencing factors.

Using a point reduction clamp with a rubber stopper from a sterile bottle for reduction of a distal radius fracture.

INTRODUCTION: There are many choices of surgical treatment for a distal radius fracture. The goal of treatment in these injuries is stable anatomical reduction of the articular surface. In a coronal split fracture, the dorsal fragment tends to dorsal displacement during drilling or when applying the distal locking screws of the plate. CASE PRESENTATION: We present an illustrative case from a larger series of a 65-year-old Thai woman with an intraarticular distal radius fracture with a dorsal fragment from a coronal-split configuration reduced and stabilized with a volar locking plate utilizing a large point reduction clamp held in place with a rubber stopper from a sterile glass bottle to counter the displacement effect of the drilling. DISCUSSION: Using a large point reduction clamp with a rubber stopper from a sterile glass bottle enables this type of difficult fracture to be both reduced and stabilized with the locking screw easily inserted to stabilize the dorsal fragment without any further displacement. The rubber stopper acts to distribute the compressive force from the large point reduction clamp over a larger area allowing a more stable fracture stabilization, while at the same time reducing skin and soft tissue trauma at the dorsal aspect of the wrist. CONCLUSION: This workaround allows improved stability in reduction and stabilization of a coronal split intraarticular distal radius fracture. The advantage of this workaround is that it uses small things readily available in every operating room setting, and it does not require any special experience or skills.

The effects of vitamin D supplementation in carpal tunnel syndrome treatment outcomes: a systematic review.

PURPOSE: Vitamin D deficiency is related to carpal tunnel syndrome symptoms. Correcting vitamin D levels by supplementation was supposed to improve carpel tunnel symptoms, though there is a lack of aggregated data about treatment outcomes. This study aimed to examine whether vitamin D supplementation could improve the treatment outcomes in carpal tunnel syndrome patients. METHODS: A comprehensive search of the PubMed, Cochrane Library, Scopus, and Web of Science databases for articles on vitamin D and carpel tunnel syndrome from January 2000 to March 2021 was performed. The article screening and data extraction were performed by two investigators independently with blinding to decisions on selected studies. All included studies had assessed the quality of evidence using the Methodological Index for Non-Randomized Studies (MINORS) scoring system. RESULTS: We retrieved four studies that met the eligibility criteria. The treatment outcomes were evaluated by visual analog scale (124 wrists), functional scores (176 patients), muscle strength (84 patients), and nerve conduction velocity (216 wrists). After vitamin D supplementation, two studies reported improved pain scores and nerve conduction velocity, and three studies showed enhancement of functional status. CONCLUSION: Vitamin D administration could offer favorable outcomes in pain improvement, better functional status, and increased sensory conduction velocity in carpal tunnel syndrome. However, there is to date no recommendations concerning a standardized dose or duration of vitamin D administration in carpal tunnel syndrome; prescribing vitamin D at the usual appropriate dose is suggested as an additional treatment in patients with mild to moderate carpel tunnel symptoms. LEVEL OF EVIDENCE: Level IV, therapeutic study.

Comparing the running subcuticular technique versus the Donati technique in open carpal tunnel release: a randomized controlled trial.

BACKGROUND: There are various skin suture techniques for wound closure following carpal tunnel release, and well-performed suturing will result in low post-operative scar tenderness. The aim of this study was to compare the Donati suture technique and running subcuticular technique in terms of surgical scar, post-operative pain and functional outcome in open carpal tunnel release. METHODS: One-hundred forty-two patients were randomized using a computer-generated random number table into two groups receiving either running subcuticular suturing or Donati suturing after surgical intervention. We evaluated postoperative scarring using the Patient and Observer Scar Assessment Scale (POSAS), pain intensity using a verbal numerical rating scale, and functional outcomes using the Thai version of the Boston Carpal Tunnel Questionnaire after surgical decompression for carpal tunnel syndrome at 2, 6, and 12 weeks. Continuous data are reported as mean ± SD while normally distributed or as median (interquartile range) when the distribution was skewed. RESULTS: Lower scores at 2 weeks were given by the patients receiving the running subcuticular suture technique than the Donati suture technique (15.3 ± 4.8 vs 17 ± 4.6, respectively, P < 0.05) while the observer scores were not significantly different (15.6 ± 5.8 vs 16.7 ± 5.2, respectively, P = 0.15). At both 6 and 12 weeks post-surgical decompression both patient and observer scores were not significantly different. There were no differences between the groups in terms of VNRS pain scores and functional Boston Carpal Tunnel Scores at all time points. CONCLUSIONS: This randomized controlled trial found that although scarring assessments were slightly better in the earliest period following wound closure after surgical decompression in carpal tunnel syndrome using the running subcuticular suture, the final results at 3 months postoperative were not significantly different. TRIAL REGISTRATION: The study was registered at https://www.thaiclinicaltrials.org/ (TCTR20191204002).

Location of the radial nerve along the humeral shaft between the prone and lateral decubitus positions at different elbow positions.

Identification of the radial nerve is important during the posterior approach to a humerus fracture. During this procedure, the patient can be placed in the prone or lateral decubitus position depending on the surgeon's preference. The distance from the radial nerve to the osseous structures will be different in each position. The purpose of this study was to identify the safety zones in various patient and elbow flexion positions. The distances from the olecranon to the center of the radial groove and intermuscular septum and lateral epicondyle to the lateral intermuscular septum were measured using a digital Vernier caliper. The measurements were performed with cadavers in the lateral decubitus and prone positions at different elbow flexion angles. The distance from where the radial nerve crossed the posterior aspect of the humerus measured from the upper part of the olecranon to the center of the radial nerve in both positions at different elbow flexion angles varied from a mean maximum distance of 130.00 mm with the elbow in full extension in the prone position to a minimum distance of 121.01 mm with the elbow in flexion at 120° in the lateral decubitus position. The mean distance of the radial nerve from the upper olecranon to the lateral intermuscular septum varied from 107.13 to 102.22 mm. The distance from the lateral epicondyle to the lateral edge of the radial nerve varied from 119.92 to 125.38 mm. There was not significant contrast in the position of the radial nerve with osseous landmarks concerning different degrees of flexion, except for 120°, which is not significant, as this flexion angle is rarely used.

The Relationship Between Arm Abduction Position and the Risk of Iatrogenic Anterior Branch of the Axillary Nerve Injuries: A Cadaveric Study.

BACKGROUND: The axillary nerve is at risk for iatrogenic injuries in surgical procedures involving the lateral aspect of the shoulder joint. To date and to our knowledge, there have been no studies that have compared the relevant distances in the common arm abduction positions used in these types of surgery as well as the relative risks of each position. PURPOSE: To evaluate the effect of arm abduction position on the distance from the acromion process to the axillary nerve in the common abducted arm positions. STUDY DESIGN: Descriptive laboratory study. METHODS: The shoulders of 10 fresh-frozen, full-body cadaveric specimens were used. A saber incision was made at the anterolateral edge of the acromion, and the anterior branch of the axillary nerve was identified. The distance between the anterolateral edge of the acromion process and the axillary nerve was measured 3 times in each of 4 positions: with the arm at the side as well as at 30°, 60°, and 90° of abduction. Then, the same procedure was performed from the midlateral and the posterolateral edges of the acromion process. The distances of the acromion process to the axillary nerve in the 4 positions were compared using 2-way analysis of variance. RESULTS: The mean distances from the anterolateral edge of the acromion process to the anterior branch of the axillary nerve were 52.76 ± 4.64 mm with the arm at the side, 49.48 ± 4.77 mm at 30° of abduction, 46.00 ± 4.75 mm at 60° of abduction, and 42.88 ± 4.59 mm at 90° of abduction. There was a significant decrease in the distance from the anterolateral edge of the acromion process to the axillary nerve as the abduction angle of the arm increased from 0° to 60°, 0° to 90°, and 30° to 90° (P < .05). CONCLUSION: The distances from the acromion process to the axillary nerve were shorter in all abducted arm positions than with the arm at the side. CLINICAL RELEVANCE: To avoid iatrogenic axillary nerve injuries, surgeons should be aware of the safe zone based on the shortest distance from the acromion process to the axillary nerve to ensure no accidental damage to this structure instead of using the mean distance of 5 cm.

Expectations on online orthopedic course using constructivism theory: A cross-sectional study among medical students.

BACKGROUND: Medical education in this era has been disturbed by coronavirus disease. Our faculty has quickly adapted the curricula to online formats. The online format seems to be more advantageous in terms of content material and virtual activities, but the results of these adjustments will require subsequent evaluation. The aim of this study was to evaluate medical student expectations of online orthopedics learning that was created based on social constructivism theory. MATERIALS AND METHODS: A cross-sectional survey was carried out to assess the fifth-year medical student expectations of our newly developed online orthopedics course during the outbreak. Constructivist Online Learning Environment Survey (COLLES) was applied for evaluating the expectations during orthopedic rotation. The survey contains six aspects based on social constructivist principles: relevance, reflection, interactivity, tutor support, peer support, and interpretation. All students responded to the preferred COLLES before starting the online course, and the actual COLLES was filled out when the online course was completed. Before and after attending the online course, the scores were compared and interpreted to assess student expectations. RESULTS: A total of 126 fifth-year medical students studied the online orthopedic course. The preferred COLLES were completed by 125 students, while 120 students replied to the actual COLLES. The overall scores from the post-course survey in all aspects were significantly higher than scores from the pre-course with P-value < 0.01. The comparison between the preferred and actual scores showed this online course fulfilled student expectations. CONCLUSION: The outbreak of coronavirus disease 19 has disrupted medical student education. The online orthopedic learning course in our department has been developed to deal with the current situation. Using the various activities based on social constructivism theory in the online platform was able to fulfill medical student expectations.

Tuberculosis Septic Arthritis of the Elbow: A Case Report and Literature Review.

Tuberculosis (TB) infections of the musculoskeletal system are rare. A 77-year-old female with chronic left elbow pain for five months was treated by irrigation and debridement of the elbow for a presumed diagnosis of septic arthritis. Her pain and wound condition did not improve, and she was referred to our institution. Plain radiograph and magnetic resonance imaging (MRI) revealed an osteolytic lesion with joint effusion and severe destruction of the elbow joint. We suspected an atypical infection of the elbow due to the chronicity, negative culture results and severe osteoarticular destruction. An open arthrotomy with irrigation and debridement was performed, and the joint was stabilized with a pin and immobilized. A tissue acid-fast bacillus (AFB) stain was positive and Mycobacterium tuberculosis culture and polymerase chain reaction (PCR) were also positive. Anti-TB drugs were started for a planned 12-month course, but she developed an adverse drug reaction from the standard regimen and had to be switched to a second-line regimen. The stitches were removed at two weeks and the wound eventually healed. The elbow was immobilized in a posterior slab for six weeks then the pin was removed. At the last follow-up visit seven months after the initial surgery, she had improved, with only mild pain on elbow motion. Her range of motion was 110 degrees of flexion and extension lag of 30 degrees. TB of the elbow is a rare condition. The presentation is insidious and varies, and can be confused with other elbow conditions. Delayed diagnosis can lead to severe joint destruction and poor outcome. The physician should always suspect a TB elbow in cases of chronic elbow pain with synovitis, especially in areas endemic for TB. Joint fluid aspiration and MRI are the most reliable investigations for diagnosis. Anti-TB drugs are the mainstay of treatment. Appropriate surgical interventions such as drainage, synovectomy and reconstructive procedures will often be required. Collaboration between the orthopedist and an infectious specialist is essential for optimal treatment planning.

Tuberculous tenosynovitis of the Flexor Tendons of the hand and wrist: A case report and mini-review.

Tuberculous tenosynovitis of hand and wrist is a rare disease but it is found sometimes, especially in TB-endemic areas. The clinical presentation is not specific, however, most patients present with painless swelling at the wrist and hand with limited range of motion, and nerve compression symptoms have been reported. The diagnosis of this conditions can be made from histopathology. Antituberculosis drugs are the mainstay treatment while surgery is controversial. CASE PRESENTATION: We present the case of an 83-year-old Thai woman with no history of exposure to tuberculosis. She presented with swelling and mild pain at her right wrist and the fifth finger of her right hand for 3 months. Ultrasonography revealed tenosynovitis in the right hand and wrist. Mycobacterium tuberculosis was confirmed with tissue diagnosis after an open biopsy. 2-months regimens containing Isoniazid, Rifampicin, Pyrazinamide and Ethambutol/6-months of isoniazid and rifampicin treatment was successful without complications. We follower her up for 1 year, at which time she had returned to do normal daily activities. Her final DASH score was 10.8. CONCLUSION: Tuberculous tenosynovitis is rare, but still occasionally encountered, especially in TB-endemic areas. The challenge is that this condition is difficult to diagnose due to its clinically insidious onset and the presentation is not obviously specific. Laboratory analysis, imaging (MRI, ultrasonography) and microbiology are useful to help reach a diagnosis, but finally confirmation is from histopathology. The treatment mainstay is medical, but surgery may be required if conservative treatment fails or in late stages of the disease.

Patient Position Is Related to the Risk of Neurovascular Injury in Clavicular Plating: A Cadaveric Study.

BACKGROUND: Fixation of clavicle shaft fractures with a plate and screws can endanger the neurovascular structures if proper care is not taken. Although prior studies have looked at the risk of clavicular plates and screws (for example, length and positions) to vulnerable neurovascular structures (such as the subclavian vein, subclavian artery, and brachial plexus) in the supine position, no studies to our knowledge have compared these distances in the beach chair position. QUESTIONS/PURPOSES: (1) In superior and anteroinferior plating of midclavicle fractures, which screw tips in a typical clavicular plating approach place the neurovascular structures at risk of injury? (2) How does patient positioning (supine or beach chair) affect the distance between the screws and the neurovascular structures? METHODS: The clavicles of 15 fresh-frozen cadavers were dissected. A hypothetical fracture line was marked at the midpoint of each clavicle. A precontoured six-hole 3.5-mm reconstruction locking compression plate was applied to the superior surface of the clavicle by using the fracture line to position the center of the plate. The direction of the drill bits and screws through screw holes that offer the greater risk of injury to the neurovascular structures were identified, and were defined as the risky screw holes, and the distances from the screw tips to the neurovascular structures were measured according to a standard protocol with a Vernier caliper in both supine and beach chair positions. Anteroinferior plating was also assessed following the same steps. The different distances from the screw tips to the neurovascular structures in the supine position were compared with the distances in the beach chair position using an unpaired t-test. RESULTS: The risky screw holes were the first medial and second medial screw holes. The relative distance ratios compared with the entire clavicular length for the distances from the sternoclavicular joint to the first medial and second medial screw holes were 0.46 and 0.36 in superior plating and 0.47 and 0.37 in anteroinferior plating, respectively. The riskiest screw hole for both superior and anteroinferior plates was the second medial screw hole in both the supine and beach chair positions (supine superior plating: 8.2 mm ± 3.1 mm [minimum: 1.1 mm]; beach chair anteroinferior plating: 7.6 mm ± 4.2 mm [minimum: 1.1 mm]). Patient positioning affected the distances between the riskiest screw tip and the nearest neurovascular structures, whereas in superior plating, changing from the supine position to the beach chair position increased this distance by 1.4 mm (95% CI -2.8 to -0.1; supine 8.2 ± 3.1 mm, beach chair 9.6 ± 2.1 mm; p = 0.037); by contrast, in anteroinferior plating, changing from the beach chair position to the supine position increased this distance by 5.4 mm (95% CI 3.6 to 7.4; beach chair 7.6 ± 4.2 mm, supine 13.0 ± 3.2 mm; p < 0.001). CONCLUSIONS: The second medial screw hole places the neurovascular structures at the most risk, particularly with superior plating in the supine position and anteroinferior plating in the beach chair position. CLINICAL RELEVANCE: The surgeon should be careful while making the first medial and second medial screw holes. Superior plating is safer to perform in the beach chair position, while anteroinferior plating is more safely performed in the supine position.