Abstract

The COVID-19 pandemic necessitated a pivot to online learning for many traditional, hands-on subjects such as anatomy. This, coupled with the increase in online education programmes, and the reduction of time students spend in anatomy dissection rooms, has highlighted a real need for innovative and accessible learning tools. This study describes the development of a novel 3-dimensional (3D), interactive anatomy teaching tool using structured light scanning (SLS) technology. This technique allows the 3D shape and texture of an object to be captured and displayed online, where it can be viewed and manipulated in real-time.

Human bones of the upper limb, vertebrae and whole skulls were digitised using SLS using Einscan Pro2X/H scanners. The resulting meshes were then post-processed to add the captured textures and to remove any extraneous information. The final models were uploaded into Sketchfab where they were orientated, lit and annotated. To gather opinion on these models as effective teaching tools, surveys were completed by anatomy students (n=35) and anatomy educators (n=8). Data was collected using a Likert scale response, as well as free text answers to gather qualitative information.

3D scans of the scapula, humerus, radius, ulna, vertebrae and skull were successfully produced by SLS. Interactive models were produced via scan data in Sketchfab and successfully annotated to provide labelled 3D models for examination. 94% of survey respondents agreed that the interactive models were easy to use (n=35, 31% agree and 63% strongly agree) and 97% agreed that the 3D interactive models were more useful than 2D images for learning bony anatomy (n=35; 26% agree and 71% strongly agree).

This initial study has demonstrated a suitable proof-of-concept for SLS technology as a useful technique for producing 3D interactive online tools for learning and teaching bony anatomy. Current studies are focussed on determining the SLS accuracy and the ability of SLS to capture soft tissue/joints. We believe that this tool will be a useful technique for generating online 3D interactive models to study orthopaedic anatomy.

This retrospective study evaluated 69 Swanson trapezium replacements performed between 1990 and 2009 for trapeziometacarpal osteoarthritis in 58 patients. Pain and function were assessed using the Michigan Hand Questionnaire (MHQ) and the Disability of the Arm, Shoulder and Hand (DASH) questionnaire. Patients had a mean age of 62 years at the time of surgery, with a mean time of 7.7 years from time of surgery to completion of the follow-up interview. The results showed good relief of pain and function with no significant deterioration with time from surgery. There were no gender differences or differences by age. The only differences observed were that those patients following surgery on a dominant hand indicated higher activities of daily living and work related activities. The authors conclude silicone trapezium replacement remains a good option for patients with painful trapeziometacarpal osteoarthritis that has not responded to non-operative treatment.

Introduction

Antegrade K wiring of the fifth metacarpal for treatment of displaced metacarpal neck fractures is a well recognized surgical procedure. However it is not without complication and injury to the dorsal cutaneous branch of the ulnar nerve has been reported in up to 15% of cases.

The aim of operative treatment for ankle fractures is to allow early movement after internal fixation. The hypothesis of this study was that early mobilisation facilitated by a removable cast after internal fixation of ankle fractures would improve functional recovery of patients compared with that after conventional immobilisation in a cast.

Sixty-two patients between the age of seventeen and sixty-five with ankle fractures that required operative treatment were randomly allocated to two groups: immobilisation in a non weight bearing below knee cast for six weeks or early movement in a removable cast (at two weeks after removal of sutures) for the following four weeks. The follow-up examinations which consisted of subjective (clinical, Olerud-Molander score, AOFAS score, SF 36) and objective (swelling measurement, x-ray) evaluations were performed at two, six, nine, twelve and twenty four weeks post-operatively. Time of return to work was recorded.

There were two post-operative complications in the group treated with immobilisation in cast; two patients had deep vein thrombosis (DVT). There was one superficial wound infection treated with oral antibiotics and two deep wound infections requiring removal of metal in the group treated with early movement in a removable cast. Patients in group two (early movement) had higher functional scores at nine and twelve weeks follow-up. They also returned to work earlier (63.7 days) compared with the ones treated in cast (94.9 days). There was no statistical difference in Quality of Life (SF-36 Questionnaire) at six months between the two groups.

Early movement with the use of removable cast after removal of sutures in operated ankle fractures decreases swelling, prevents calf muscle wasting, improves functional outcome and facilitates early return to work of patients. Our findings support the use of a removable cast and early exercises in selected, compliant patients after surgery of the ankle.

Introduction: Compromised by pre-existing medical co-morbidities, weakened by the second hit of surgery, elderly patients with hip fractures are amongst the most challenging cases to manage appropriately in the acute hospital setting.

Aim: To document the frequency and outcome of post operative medical complications in elderly patients following surgery for hip and proximal femoral fractures.

Methods: Retrospective analysis of acute admissions to a University teaching hospital with hip and pertrochanteric fractures over an 18 month period. Medical records and radiographs were reviewed for details relating to location of fracture, in-patient morbidity, mortality and length of stay. In-patient fracture referrals and patients under 65 years of age were excluded.

Results: From a total of 438 fracture fixation procedures or prosthetic replacements, 368 patients were eligible for analysis. The mean age of patients was 83.6 years. The mean length of stay was 14.2 days.

142 patients experienced significant postoperative morbidity consisting of 24 myocardial infarctions, 46 respiratory tract infections, 33 urinary tract infections, 3 cerebral vascular accidents and 36 exacerbations of congestive cardiac failure. There was no correlation between morbidity and location or type of fracture. The mean age (86.1 yrs) and length of stay (26 days) was greater in the morbidity group (p< 0.05). The overall post operative in-patient mortality rate was 9%, rising to 50% in those who suffered a myocardial infarction and 33% in those with exacerbations of congestive cardiac failure.

Conclusion: This study reinforces the poor prognosis conferred by a hip fracture on the elderly patient both in terms of morbidity and mortality. As the population ages and life expectancy increases, health services will come under ever more pressure to cater for the expansion in numbers of hip fracture patients. Greater resources and dedicated professional medical staff are required in order that the best possible care and outcome may be achieved for these patients

Background: The aim of operative treatment for ankle fractures is to allow early movement after internal fixation. The hypothesis of this study was that early mobilisation facilitated by a removable cast after internal fixation of ankle fractures would improve functional recovery of patients compared with that after conventional immobilisation in a cast.

Material and Methods: Sixty two patients between the age of seventeen and sixty five with ankle fractures that required operative treatment were randomly allocated to two groups : immobilisation in a non weight bearing below knee cast for six weeks or early movement in a removable cast ( at two weeks after removal of sutures ) for the following four weeks. The follow up examinations which consisted of subjective (clinical, Olerud-Molander score, AOFAS score, SF 36 ) and objective ( swelling measurement, x-ray ) evaluations were performed at two, six, nine, twelve and twenty four weeks postoperatively. Time of return to work was recorded.

Results: There were no postoperative complications in the group treated with immobilisation in cast. There was one superficial wound infection treated with oral antibiotics in a patient with a previous dermatological condition around the fractured ankle in the group treated with early movement in a removable cast. Patients in group two ( early movement ) had higher functional scores at nine and twelve weeks follow up but not of statistical significance. They also return to work earlier ( 55.5 days ) compared with the ones treated in cast ( 98.7 days ). Patients treated in removable cast had higher mean SF-36 scores, but this difference was significant only for two of the eight aspects investigated.

Conclusions: Early movement with the use of removable cast after removal of sutures in operated ankle fractures decrease swelling, prevent calf muscle wasting, improve functional outcome and facilitate early return to work of patients. Our findings support the use of a removable cast and early exercises in selected, compliant patients after surgery of the ankle.

Introduction: The optimal management of ankle fractures in the elderly is controversial, with wide variation in the complication rates reported in the literature. Achieving a satisfactory outcome is essential as reduced mobility exacerbates pre-existing morbidity and diminishes the likelihood of independent living. However, in elderly patients surgery carries increased risks due to osteoporosis, poor skin condition and decreased vascularity.

Methods: We performed a retrospective review of outcome and complications in patients over 70 years of age with ankle fractures. Patients were admitted for manipulation under anaesthetic and application of cast (MUA) or open reduction and internal fixation (ORIF). Data were retrieved from medical and nursing notes relating to pre-operative functioning, type of injury, operative procedure and outcome. All X-rays were also reviewed to confirm fracture grade and union.

Results: A total of 134 patients over the age of 70 were admitted for management of ankle fractures during January 1995 and December 2003 and 117 of these were included in the study. 84 were operatively treated for ankle fractures and a further 27 patients underwent MUA. The mean age in both groups was 76 and there was a female predominance in both groups (89% in MUA, 79% in ORIF). 14.8% of the conservatively managed group were nursing home residents compared to 2.4% of the operatively treated group. The groups were similar with respect to ASA grade and co-morbidities. The median length of stay was shorter for the conservatively managed group (4 vs. 6 days). 7.5% of the MUA group required a second intervention compared to 4.5% of the operatively managed group. There were two below knee amputations in the operatively managed group, both related to open fractures, and one arthrodesis in each group. There were three wound complications in the operatively managed group. The rate of postoperative medical complications was the same in both cohorts. 7.4% of patients treated with MUA and 1.1% of patients treated operatively had reduced mobility at final follow-up.

Conclusion: The decision-making process for treatment of ankle fractures in the geriatric population is challenging. We observed significantly better functional results in the ORIF group than the MUA group. These results indicate that open reduction and internal fixation of ankle fractures in geriatric patients is efficacious and safe in selected patients

As our population ages, the incidence of hip fractures per annum is increasing rapidly. Within this patient group are an increasing number of very elderly (over 90 years old). These patients present many challenges to the clinician, both in terms of medical co-morbidities and orthopaedic complications. While the mortality and morbidity of hip fractures in general are well recognised, this study looked exclusively at the outcome in these very elderly patients following admission.

We reviewed 100 patients admitted between May 2000 and June 2002. The average age of our patient group was 92.5 years, 18% were male and 82% female. 60% were resident in nursing homes prior to admission, 26% lived with their families and 14% lived alone in the community. 56% of the fractures suffered were intertrochanteric, 40% were intra-capsular and 4% sub-trochanteric.

Following admission, these patients waited on average 1.5 days before undergoing surgery, the predominant cause for pre-operative delay being maximisation of pre-operative medical condition. Median pre-operative ASA score was three. The method of anaesthesia used was spinal in 78% and general in 22%. 64% of the group underwent internal fixation and 34% had a hemiarthroplasty. Two patients were deemed unfit to ever undergo surgery. Following surgery, mean in-hospital stay was 9.3 days.

There were 8 in-patient post-operative mortalities. Major post-operative morbidities occurred in 8% and included: 3 myocardial infarctions, 2 acute onset cardiac failure and 1 prosthetic dislocation. 11% of patients required a blood transfusion. 25% of the patients died within forty days of surgery, however, 50% of the patients were still alive 126 days post-op. Overall, the mean survival was 195 days. Post-discharge morbidity included two patients who had failure of internal fixation and 8 patients with severe immobility.

We conclude that hip fracture surgery in the nonagenarian population is as well tolerated as surgery in younger patients. Careful pre-operative assessment and medical maximisation combined with prompt surgical intervention yielded a good outcome and return to pre-injury status for most patients.

Introduction: The red, hot swollen knee is commonly seen in the A& E department and can present a diagnostic dilemma for the casualty officer. While superficial cellulites and bursitis are the most common diagnoses, anxiety is induced by the spectre of septic arthritis. The potential sequalae from aspirating a knee through infected superficial tissues further emphasise the importance of making an accurate clinical diagnosis.

The lymph drainage of the superficial tissues of the lower limb is via lymphatics that accompany the long saphenous vein and drain to the lower group of the superficial inguinal nodes. Drainage from the knee joint is to a popliteal node situated between the knee joint capsule and the popliteal artery. Efferents from this node ascend in close relation to the femoral vessels and drains to the deep inguinal nodes. We hypothesise that the differences in lymphatic drainage mean that palpable inguinal nodes are more likely with superficial infections than with septic arthritis. We reviewed the clinical findings in a group of patients with superficial or deep infections to test this theory.

Patients and Methods: From January 1995 until June 2000, twenty-seven patients were admitted with septic arthritis of the knee and fifty-one with superficial cellulites or bursitis about the knee. The former were diagnosed on the basis of clinical findings and a knee aspirate, the latter on clinical findings and response to treatment. The presence or absence of palpable inguinal lymph nodes was determined and compared for each diagnostic group.

Results: Joint aspirates from the group with septic arthritis grew organisms in twenty patients (staph aureus in 19, strep pneumoniae in one). The remaining seven patients had no growth but purulent fluid on aspirate with leukocyte counts in excess of 50,000/mm³. Six patients had rheumatoid arthritis and two were HIV positive IVDA’s but the rest had no pre-disposing factors. The average age was 52 (range 16–83). All were treated with arthroscopic washout (average 2.2/patient) and antibiotic chemotherapy.

In the superficial infection group 28 (56%) had pre-patellar bursitis and 23 (54%) cellulites. All were treated with antibiotics while eight of the bursitis group required incision and drainage. In the patients with superficial infection 32 (63%) had palpable inguinal lymphadenopathy while no patient with septic arthritis of the knee had palpably enlarged inguinal lymph nodes. This result is highly statistically significant (p< 0.01).

Discussion: It is well recognised that neoplastic or inflammatory conditions of the superficial tissues of the lower limb may be associated with inguinal lymphadenopathy. A similar association for septic arthritis of the knee has not to our knowledge been described. Our study would suggest that palpably enlarged lymph nodes are unusual in this condition. While it is worth emphasizing that the presence of lymph nodes does not rule out absolutely the possibility of septic arthritis, their presence or absence may be useful in differentiating superficial from deep infections about the knee.