Teaching Science to the Next Generation.

Teaching science to the next generation begins with foundations laid in podiatric medical school. Interest and immersion in research continues to develop through residency as trainees prepare for cases, participate in journal clubs, present posters and articles, and attend conferences. Having adequate training is essential to production of quality research. Although challenges and barriers exist, numerous resources are available at all levels of practice to guide those who are interested in contributing to the body of literature that supports the profession. Ensuring a robust pipeline of future clinician scientists is critical to the future of the profession.

Factors Associated With Successful Closed Reduction of Dislocated Ankle Fractures at a US Level-1 Trauma Center.

Dislocated ankle fractures represent a common presenting pathology at US emergency departments, and several different procedural and anesthetic techniques are employed for attempted closed reduction of these injuries. The objective of this investigation was to evaluate the frequency of and factors associated with success in the closed reduction of dislocated ankle fractures. A diagnostic code search produced 1050 ankle fractures presenting to an urban US level-1 emergency department. These medical records were interrogated and first categorized into whether or not a closed reduction was attempted. Those identified closed reduction attempts were further categorized into whether the attempt was successful. A comparative analysis was subsequently performed of variables associated with procedure success. Of the 1050, 97 (9.2%) required closed reduction and of these, 76 (78.4%) were successfully closed reduced on the first attempt. No differences were observed in initial procedure success with respect to subject age (p = .701), subject gender (p = .623), fracture laterality (p = 1.00), open versus closed injuries (p = .282), fracture mechanism (p = 1.00), utilized anesthetic technique (p value range 0.291-0.616), or the specialty performing the reduction (p-value range 0.402-1.00). A descriptive subanalysis was performed on those fractures with an unsuccessful first closed reduction attempt. It is our hope that this investigation adds to the body of knowledge with respect to a commonly performed procedure by foot and ankle surgeons.

A Critical Biomechanical Evaluation of Foot and Ankle Soft Tissue Repair.

The objective of this article is to review the biomechanical stresses that occur during normal physiologic function of lower extremity soft tissue anatomic structures and to use this as a baseline for a critical analysis of the medical literature because it relates to surgical reconstruction following injury. The Achilles tendon, anterior talofibular ligament, plantar plate, and spring ligament are specifically evaluated.

An Evaluation of Basic Demographic Characteristics in Foot and Ankle Surgery From the American College of Surgeons National Surgical Quality Improvement Program.

It has become increasingly prevalent in the foot and ankle surgical literature to evaluate outcomes and trends obtained from large databases. The objective of this investigation was to provide a broad descriptive analysis and compare basic demographic characteristics relating to foot and ankle surgery within the American College of Surgeons National Surgical Quality Improvement Program database. The 16 Current Procedural Terminology® (CPT) codes available within this database pertaining to foot and ankle surgery were studied. Several CPT codes were observed to be more frequently associated with male gender: 27650 (Achilles tendon repair), 27698 (Lateral ankle reconstruction), 27702 (Total ankle arthroplasty), 27766 (ORIF medial malleolus fracture), 27792 (ORIF lateral malleolus fracture), and 28805 (Metatarsal amputation). Several other CPT codes were observed to be more frequently associated with female gender: 27658 (Primary peroneal tendon repair), 27814 (ORIF bimalleolar fracture), 27822 (ORIF trimalleolar ankle fracture without posterior lip fracture), and 27823 (ORIF trimalleolar ankle fracture with posterior lip fracture). The elective case designation was observed to be more frequently associated with male gender (65.4 vs 58.7%; p < .001). These data have potential use in the development and interpretation of quality improvement/performance improvement protocols at individual health care delivery centers, as well as the interpretation of other published investigations utilizing this database.

A Comparison of Adverse Short-Term Outcomes Following Forefoot Amputation Performed on an Inpatient Versus Outpatient Basis.

The objective of this investigation was to evaluate short-term adverse outcomes following forefoot amputation with a specific comparison between those procedures performed on an inpatient versus outpatient basis. The 2018 American College of Surgeons National Surgical Quality Improvement Program database was interrogated to select those subjects with a 28805 current procedural terminology code (amputation, foot; transmetatarsal) that underwent the procedure with "all layers of incision (deep and superficial) fully closed." This resulted in 326 subjects who underwent the procedure on an inpatient basis and 72 subjects who underwent the procedure on an outpatient basis. Results of the primary outcome measures found no significant differences between groups with respect to the development of a superficial surgical site infection (5.8% vs 5.6%; p = .950), deep incisional infection (3.4% vs 5.6%; p = .380), or wound disruption (3.4% vs 6.9%; p = .163). Additionally, no significant differences were observed between groups with respect to unplanned reoperations (15.6% vs 12.5%; p = .500) or unplanned hospital readmissions (21.8% vs 23.6%; p = .957). The results of this investigation demonstrate no difference in short-term adverse outcomes following the performance of forefoot amputation with primary closure when the procedure is performed on an inpatient or outpatient basis. We hope that this information is utilized in future investigations specifically examining this clinical scenario as it relates to hospital admission criteria related to lower extremity tissue loss, length of hospital stay considerations, the timing of partial foot amputation following revascularization, and the economics of limb preservation.

The Effect of Remnant Metatarsal Parabola Structure on Transmetatarsal Amputation Primary Healing and Durability.

Although generally considered to be both a durable and functional procedure for limb preservation, the transmetatarsal amputation (TMA) has high rates of complication, failure, revisional operation, and progression to more proximal amputation. The objective of this investigation was to determine the effect of remnant metatarsal parabola structure on healing outcomes following TMA. A retrospective chart review was performed of subjects undergoing a complete TMA with primary closure. We considered 4 patterns of remnant metatarsal parabola structure. TMA pattern type 1 was a normal parabola with the remnant second metatarsal extending furthest distally and slightly longer than the remnant first and third metatarsals with a gradual lateral taper. TMA pattern type 2 was the first metatarsal remnant extending furthest distally with a gradual lateral taper. TMA pattern type 3 was a relatively long fifth metatarsal remnant without the presence of a gradual lateral taper. And TMA pattern type 4 was a relatively short first metatarsal remnant with a relatively long second metatarsal with a gradual lateral taper. Seventy-three transmetatarsal amputations in 73 subjects met selection criteria. Thirty-nine (53.4%) amputations healed primarily at 90 days. No statistically significant differences were observed between groups with respect to the 90-day primary healing rate (p = .571) or 1-year ambulation rate without wound recurrence or reoperation (p = .811). These results might indicate that the remnant metatarsal structure does not have an effect on transmetatarsal amputation outcome. It is our hope that these results add to the body of knowledge and lead to further investigations into outcomes of limb preservation surgical interventions.

Perceived Stress of Podiatric Medical Students.

BACKGROUND: The primary objective of this investigation was to objectify perceived stresses of students enrolled at a US college of podiatric medicine. METHODS: Following preliminary pilot data collection and representative student interviews, the Perceived Stress Scale and a newly developed survey consisting of 46 potential stresses were administered to students. Participants were asked to identify up to ten items from the survey that caused them the most stress and to further identify up to three of these ten that they considered to be the most stressful. RESULTS: A response rate of 71.5% (261 of 365) was observed. Specific results demonstrate that levels of perceived stress in podiatric medical students are higher than those in the general population, as well as some potential trends with respect to specific perceived stresses that change over time. CONCLUSIONS: The results of this investigation provide quantitative evidence of perceived levels of stress and specific stresses of students enrolled at a US college of podiatric medicine. We hope that these findings increase awareness of stress in podiatric medicine, lead to colleges of podiatric medicine taking active steps to improve student stress education, and lead to future investigations of stress and mental health in the field of podiatric medicine.

A Review of the Effect of Lower-Extremity Pathology on Automobile Driving Function.

The effect of lower-extremity pathology and surgical intervention on automobile driving function has been a topic of contemporary interest in the medical literature. The objective of this review was to summarize the topic of driving function in the setting of lower-extremity impairment. Included studies involved lower-extremity immobilization devices, elective and traumatic lower-limb surgery, chronic musculoskeletal pathology, and diabetes as it relates to the foot and ankle, focusing on the effect each may have on driving function. We also discuss the basic US state regulations with respect to impaired driving and changes to automobile structure that can be made in the setting of lower-extremity pathology.

Anatomic Feasibility of Distal Fibula Bicortical Screw Fixation With Lateral Neutralization Plating for Rotational Ankle Fractures.

A common technique for fixation of rotational fibular fractures is to use an interfragmentary compression screw with a laterally positioned neutralization plate. The objective of the present investigation was to examine the anatomic feasibility of distal fibula bicortical fixation within this plating technique. A specific screw insertion technique was performed through a laterally positioned one-third tubular plate on a consecutive series of 81 intact cadaveric ankle mortises. The most distal plate hole was drilled, aimed 10° posterior to the midline of the fibula. The second-most distal plate hole was drilled, aimed 25° superiorly. The specimens were then dissected, and the screw termini were physically examined for whether they had penetrated the articular cartilage of the ankle mortise. The length of the most distal bicortical screw measured a mean ± standard deviation of 20.44 ± 2.49 (range 14 to 26) mm, with an extra-articular terminus in 95.06% of specimens. The length of the second-most distal bicortical screw measured a mean ± standard deviation of 19.68 ± 3.02 (range 12 to 28) mm, with an extra-articular terminus in 100% of the specimens. The results of the present study provide evidence that bicortical distal fibular fixation in accordance with basic fixation principles is anatomically possible and feasible with a one-third tubular plate. This could potentially obviate the need for more expensive fixation options (i.e., locked plates or anatomically contoured plates) and fixation options that are biomechanically stable but potentially anatomically impeding (i.e., posterior antiglide plating).

A Survey of Patient Care Handoff and Sign-Out Practices Among Podiatric Surgical Residency Programs.

BACKGROUND: A patient "handoff," or the "sign-out" process, is an episode during which the responsibility of a patient transitions from one health-care provider to another. These are important events that affect patient safety, particularly because a significant proportion of adverse events have been associated with a relative lack of physician communication. The objective of this investigation was to survey podiatric surgical residency programs with respect to patient care handoff and sign-out practices. METHODS: A survey was initially developed and subsequently administered to the chief residents of 40 Council on Podiatric Medical Education-approved podiatric surgical residency programs attempting to elucidate patient care handoff protocols and procedures and on-call practices. RESULTS: Although it was most common for patient care handoffs to occur in person (60.0%), programs also reported that handoffs regularly occurred by telephone (52.5%) and with no direct personal communication whatsoever other than the electronic passing of information (50.0%). In fact, 27.5% of programs reported that their most common means of patient care handoff was without direct resident communication and was instead purely electronic. We observed that few residents reported receiving formal education or assessment/feedback (17.5%) regarding their handoff proficiency, and only 5.0% of programs reported that attending physicians regularly took part in the handoff/sign-out process. Although most programs felt that their sign-out practices were safe and effective, 67.5% also believed that their process could be improved. CONCLUSIONS: These results provide unique information on a potentially underappreciated aspect of podiatric medical education and might point to some common deficiencies regarding the development of interprofessional communication within our profession during residency training.

Effect of Obesity on Total Ankle Arthroplasty: A Systematic Review of Postoperative Complications Requiring Surgical Revision.

Total ankle arthroplasty has become an increasingly used alternative to ankle arthrodesis for the treatment of end-stage ankle arthritis. However, despite progressive technological advances and the advent of multiple commercial implant systems, some concern remains for the relatively high complication and failure rates. The objective of the present investigation was to perform a systematic review of the incidence of complications in obese patients undergoing total ankle arthroplasty. We performed a review of electronic databases with the inclusion criteria of retrospective case series, retrospective clinical cohort analyses, and prospective clinical trials with ≥15 total participants, a mean follow-up period of ≥12 months, ≥1 defined cohort with a body mass index of ≥30 kg/m2, and a reported incidence rate of complications requiring revisional surgery at the final follow-up point. Four studies met our inclusion criteria, with a total of 400 implants analyzed. Of these, ≥71 (17.8%) developed a complication requiring a revisional surgical procedure. The most commonly reported surgeries were revision of the metallic components and ankle gutter debridement. It is our hope that our investigation will allow foot and ankle surgeons to more effectively communicate the perioperative risk to their patients during the education and consent process.

Rate of and Factors Associated with Ambulation After Unilateral Major Lower-Limb Amputation at an Urban US Tertiary-Care Hospital with a Multidisciplinary Limb Salvage Team.

BACKGROUND: One relatively universal functional goal after major lower-limb amputation is ambulation in a prosthesis. This retrospective, observational investigation sought to 1) determine what percentage of patients successfully walked in a prosthesis within 1 year after major limb amputation and 2) assess which patient factors might be associated with ambulation at an urban US tertiary-care hospital. METHODS: A retrospective medical record review was performed to identify consecutive patients undergoing major lower-limb amputation. RESULTS: The overall rate of ambulation in a prosthesis was 29.94% (50.0% of those with unilateral below-the-knee amputation [BKA] and 20.0% of those with unilateral above-the-knee amputation [AKA]). In 24.81% of patients with unilateral BKA or AKA, a secondary surgical procedure of the amputation site was required. In those with unilateral BKA or AKA, statistically significant factors associated with ambulation included male sex (odds ratio [OR] = 2.50) and at least 6 months of outpatient follow-up (OR = 8.10), survival for at least 1 postoperative year (OR = 8.98), ambulatory preamputation (OR = 14.40), returned home after the amputation (OR = 6.12), and healing of the amputation primarily without a secondary surgical procedure (OR = 3.62). Those who had a history of dementia (OR = 0.00), a history of peripheral arterial disease (OR = 0.35), and a preamputation history of ipsilateral limb revascularization (OR = 0.14) were less likely to walk. We also observed that patients with a history of outpatient evaluation by a podiatric physician before major amputation were 2.63 times as likely to undergo BKA as opposed to AKA and were 2.90 times as likely to walk after these procedures. CONCLUSIONS: These results add to the body of knowledge regarding outcomes after major amputation and could be useful in the education and consent of patients faced with major amputation.

Diabetic Driving Studies-Part 3: A Comparison of Mean Brake Response Time Between Neuropathic Diabetic Drivers With and Without Foot Pathology.

We have previously demonstrated an abnormally delayed mean brake response time and an increased frequency of abnormally delayed brake responses in a group of neuropathic diabetic drivers compared with a control group of drivers with neither diabetes nor lower extremity neuropathy. The objective of the present case-control study was to compare the mean brake response time between neuropathic diabetic drivers with and without specific diabetic foot pathology. The braking performances of the participants were evaluated using a computerized driving simulator with specific measurement of the mean brake response time and the frequency of abnormally delayed brake responses. We analyzed a control group of 20 active drivers with type 2 diabetes, lower extremity neuropathy, and no history of diabetic foot pathology and an experimental group of 20 active drivers with type 2 diabetes, lower extremity neuropathy, and a history of diabetic foot pathology (ulceration, amputation, and/or Charcot neuroarthropathy) from an urban U.S. podiatric medical clinic. Neuropathic diabetic drivers without a history of specific foot pathology demonstrated an 11.11% slower mean brake response time (0.790 ± 0.223 versus 0.711 ± 0.135 second; p < .001), with abnormally delayed reactions occurring at a similar frequency (58.13% versus 48.13%; p = .0927). Both groups demonstrated a mean brake response time slower than a suggested threshold of 0.70 second. The results of the present investigation provide evidence that diabetic patients across a spectrum of lower extremity sensorimotor neuropathy and foot pathology demonstrate abnormal automobile brake responses and might be at risk of impaired driving function.

Diabetic Driving Studies-Part 2: A Comparison of Brake Response Time Between Drivers With Diabetes With and Without Lower Extremity Sensorimotor Neuropathy.

We have previously demonstrated an abnormally delayed mean brake response time and an increased frequency of abnormally delayed brake responses in a group of neuropathic drivers with diabetes compared with a control group of drivers with neither diabetes nor lower extremity neuropathy. The objective of the present case-control study was to compare the mean brake response time between 2 groups of drivers with diabetes with and without lower extremity sensorimotor neuropathy. The braking performances of the participants were evaluated using a computerized driving simulator with specific measurement of the mean brake response time and the frequency of the abnormally delayed brake responses. We compared a control group of 25 active drivers with type 2 diabetes without lower extremity neuropathy and an experimental group of 25 active drivers with type 2 diabetes and lower extremity neuropathy from an urban U.S. podiatric medical clinic. The experimental group demonstrated an 11.49% slower mean brake response time (0.757 ± 0.180 versus 0.679 ± 0.120 second; p < .001), with abnormally delayed reactions occurring at a greater frequency (57.5% versus 35.0%; p < .001). Independent of a comparative statistical analysis, diabetic drivers with neuropathy demonstrated a mean brake response time slower than a suggested safety threshold of 0.70 second, and diabetic drivers without neuropathy demonstrated a mean brake response time faster than this threshold. The results of the present investigation provide evidence that the specific onset of lower extremity sensorimotor neuropathy associated with diabetes appears to impart a negative effect on automobile brake responses.

U.S. State Driving Regulations Relevant to Foot and Ankle Surgeons.

The effect of lower extremity pathology and surgery on automobile driving has been a topic of contemporary interest, because these conditions can be associated with impaired driving function. We reviewed the U.S. driving laws relative to foot and ankle patients, for the 50 U.S. states (and District of Columbia). We aimed to address the following questions relative to noncommercial driving regulations: does the state have regulations with respect to driving in a lower extremity cast, driving with a foot/ankle immobilization device, driving with acute or chronic lower extremity pathology or disability, those who have undergone foot and/or ankle surgery, and those with diabetes? Full state-specific answers to the preceding questions are provided. Most states had no explicit or specific regulations with respect to driving in a lower extremity cast, a lower extremity immobilization device, or after foot and/or ankle surgery. Most states asked about diabetes during licensing application and renewal, and some asked specifically about lower extremity neuropathy and amputation. Most did not require physicians to report their patients with potentially impaired driving function (Pennsylvania and Oregon excepted) but had processes in place to allow them to do so at their discretion. Most states have granted civil and/or criminal immunity to physicians with respect to reporting (or lack of reporting) of potentially impaired drivers. It is our hope that this information will be useful in the development of future investigations focusing on driving safety in patients with lower extremity dysfunction.

A pictorial review of reconstructive foot and ankle surgery: evaluation and intervention of the flatfoot deformity.

This pictorial review focuses on basic procedures performed within the field of podiatric surgery, specifically for elective reconstruction of the midfoot and rearfoot with focus on the flatfoot deformity. Our goal is to demonstrate objective radiographic parameters that surgeons utilize to initially define the deformity, lead to procedure selection, and judge post-operative outcomes. We hope that radiologists will employ this information to improve their assessment of post-operative radiographs following reconstructive foot surgeries. First, relevant radiographic measurements are defined and their role in procedure selection explained. Second, the specific surgical procedures of the Evans calcaneal osteotomy, medial calcaneal slide osteotomy, Cotton osteotomy, subtalar joint arthroeresis, and arthrodeses of the rearfoot are described. Finally, specific plain film radiographic findings that judge post-operative outcomes for each procedure are detailed.

Effect of Variable Lower Extremity Immobilization Devices on Emergency Brake Response Driving Outcomes.

The effect of lower extremity pathologic features and surgical intervention on automobile driving function has been a topic of contemporary interest in the orthopedic medical literature. The objective of the present case-control investigation was to assess 3 driving outcomes (i.e., mean emergency brake response time, frequency of abnormally delayed brake responses, and frequency of inaccurate brake responses) in a group of participants with 3 variable footwear conditions (i.e., regular shoe gear, surgical shoe, and walking boot). The driving performances of 25 participants without active right-sided lower extremity pathology were evaluated using a computerized driving simulator. Both the surgical shoe (0.611 versus 0.575 second; p < .001) and the walking boot (0.736 versus 0.575 second; p < .001) demonstrated slower mean brake response times compared with the control shoe gear. Both the surgical shoe (18.5% versus 2.5%; p < .001) and the walking boot (55.5% versus 2.5%; p < .001) demonstrated more frequent abnormally delayed brake responses compared with the control shoe gear. The walking boot (18.0% versus 2.0%; p < .001) demonstrated more frequent inaccurate brake responses compared with the control shoe gear. However, the surgical shoe (4.0% versus 2.0%; p = .3808) did not demonstrate a difference compared with the control shoe gear. The results of the present investigation provide physicians working with the lower extremity with a better understanding on how to assess the risk and appropriately advise their patients who have been prescribed lower extremity immobilization devices with respect to the safe operation of an automobile.

Effect of patient positioning on toe pressure measurement using noninvasive vascular testing.

OBJECTIVE: Interpretation of digital pressure in the assessment of healing potential for diabetic foot disease has become common because of the potential for false elevation with the ankle-brachial index. However, the specific testing protocol for segmental Doppler examinations and photoplethysmography require patients to be in the supine position, with the lower limbs at heart level, in order to minimise the effect of hydrostatic pressure. This may be difficult in many patients with lower extremity pathology, particularly those who are nonambulatory, with painful wounds, or with orthopnea. In these situations, the noninvasive vascular test may be performed with the patient in a more comfortable position, which may include sitting in a wheelchair with the leg in a dependent position. The objective of this investigation was to evaluate the effect of patient positioning on measurement of the digital pressure. METHOD: Hallux pressures were measured in 20 healthy volunteers in 3 variable positions of limb dependency. RESULTS: The mean±standard deviation of digital pressure for subjects while lying supine with the limb at heart level was 103.5±26.0 mmHg (the recommended position for performance of the test), while sitting upright with the limb level on the table was 130.6±27.9 mmHg (+26.2%, p<0.0001) and sitting upright with the limb in a dependent position was 169.8±30.8 mmHg (+64.1%, p<0.0001). CONCLUSION: On the basis of these results, we conclude that patient positioning has a significant effect on measurement of digital pressure.

Use of an all-suture anchor for re-creation of the anterior talofibular ligament: a case report.

The lateral ankle ligament complex is typically injured during athletic activity caused by an inversion force on a plantar flexed foot. Numerous open surgical procedures to reconstruct the lateral ankle complex have been described. In contrast, we present a case report in which an all-suture anchor was used arthroscopically to re-create the anterior talofibular ligament in conjunction with ankle arthroscopy. A retrospective analysis of a 55-year-old male with a work-related inversion ankle sprain was performed with 14 months of follow-up. Objective and subjective assessments were obtained using range of motion measures, a strength assessment, and the Foot Function Index. An all-suture anchor was deployed through the anterolateral portal and secured in both the fibula and talus, re-creating the anterior talofibular ligament at its origin and insertion. Active range of motion physical therapy began at 2 weeks postoperatively. The patient started a neuromuscular re-education program at 5 weeks with minimal pain or discomfort. A return to full duty was achieved at 3 months postoperatively. To our knowledge, the use of an all-suture anchor has not been previously reported for lateral ankle complex re-creation. It is hoped that this approach to anterior talofibular ligament repair will decrease the incidence of complications and improve outcomes.