Development of a novel 3D-printed and silicone live-wire model for thyroidectomy.

PURPOSE: We present the development and validation of a novel and innovative low-cost model for thyroidectomy. The purpose is to provide a high-fidelity and inexpensive method to provide repetition to surgeons early on the learning curve. MATERIALS AND METHODS: The model consists of a 3D-printed laryngeal and tracheal framework, with silicone components to replicate the thyroid gland, strap muscles, and skin. A copper wire models the recurrent laryngeal nerve and is circuited with a buzzer to indicate contact with instruments. Thirteen resident trainees successfully completed the simulated thyroidectomy after viewing an instructional video. Face validity of the model was assessed with a 19-item 5-point Likert scale survey. Subject performance was assessed using a checklist of procedure steps. RESULTS: Participant feedback indicated enthusiasm for realism of the recurrent nerve (4.46 average Likert rating, 5 indicates strong agreement), dissection of the nerve (4.15), use of the buzzer (4.69), and overall satisfaction (4.46). Soft tissue components scored poorly including realism of the skin (3.08), thyroid gland (3.31), and mobilization of the lobe (3.23), identifying aspects to improve. All participants reported increased confidence with thyroid surgery after using the model; this was most pronounced among junior residents (1.5 ± 0.76 versus 3.13 ± 1.13; p = 0.016). CONCLUSION: Thyroidectomy requires repetition and volume to gain competence. Use of the simulator early in training will provide confidence and familiarity, to enhance the educational value of subsequent live surgery.

"It's a Big Part of Being Good Surgeons": Surgical Trainees' Perceptions of Error Recovery in the Operating Room.

BACKGROUND: The burden of surgical error is high - errors threaten patient safety, lead to increased economic costs to society, and contribute to physician and resident burnout. To date, the majority of work has focused on strategies for reducing the incidence of surgical error, however, total error eradication remains unrealistic. Errors are, to some extent, unavoidable. Adequate preparation for practice should include optimal ways to manage and recover from errors; yet, these skills are rarely taught or assessed. OBJECTIVES: This study aims to explore residents' perceptions and experiences of surgical error recovery. More specifically, we documented participant definitions of error recovery, and explored factors that were perceived to influence error recovery experiences and training in the operating room. METHOD: Guided by a qualitative descriptive approach, we conducted semi-structured interviews with residents and fellows in surgical specialties in Canada and the United States. Purposive and snowball sampling were used to recruit residents and fellows in postgraduate year 1 to 5. Interviews were transcribed, analyzed and inductively coded. RESULTS: A total of 15 residents and fellows participated. When exploring the importance of error recovery for the trainees, competency and safety emerged as main themes, with error recovery being considered an indicator of overall surgical competency. Data concerning factors perceived to influence error recovery training were grouped under 4 major themes: (1) supervision (supervisor-related factors such as attending behaviors and reactions to errors), (2) self (factors such as self-assessed competency), (3) surgical context (factors related to the specific surgery or patient), and (4) situation safeness. Situational safeness was identified as a transversal theme describing factors to be considered when balancing between patient safety and the learning benefits of error recovery training. CONCLUSION: Error recovery was considered to be an important skill for safe surgical practice and was considered an important educational target for learners during surgical training. Trainees' opportunities to learn to recover from technical errors in the OR are perceived to be influenced by several factors, leading to variable experiences and inconsistent opportunities to practice error recovery skills. Focusing on factors related to "supervision," "self," "surgery," and "situational safeness" may be an initial framework on which to build initial educational interventions to support the development of error recovery skills to better support safe surgical practice.

Predictive value of positional change in vital capacity to identify diaphragm dysfunction.

RATIONALE: Sitting-to-supine fall in vital capacity (ΔVC) can be used to help identify diaphragm dysfunction (DD), but its optimal predictive threshold value is uncertain. Our aim was to evaluate the diagnostic performance of ΔVC in identifying the presence of unilateral or bilateral DD. METHODS: Patients referred to the diaphragm dysfunction clinic of our center (2017-2018) were included. All subjects had lung function testing (including measurement of ΔVC) and an ultrasound assessment of diaphragm thickening fraction (TFdi). Unilateral DD was defined as a single hemidiaphragm with TFdi ≤30 % and bilateral DD as a mean TFdi value of both hemidiaphragms ≤30 %. Clinical and physiological characteristics were compared across groups, and sensitivity/specificity analyses of ΔVC to identify DD were performed. RESULTS: 84 patients were included (31 unilateral DD, 17 bilateral DD and 36 without significant DD). DD groups had similar age, gender and BMI (all p > 0.05), but patients with bilateral DD had lower FVC, FEV1, MIP, TLC, ΔVC and more frequent orthopnea than patients with unilateral DD (all p < 0.05). There was a significant correlation between TFdi and ΔVC (rho=-0.56, p < 0.001). The optimal ΔVC value to identify bilateral DD was ≤-15 % [AUC 0.97 (95 %CI 0.89-1.00), p < 0.001, with sensitivity and specificity of 100 % and 89 %, respectively]. No single threshold of ΔVC could accurately predict unilateral DD [AUC 0.58 (95 %CI 0.45-0.72), p = 0.24]. CONCLUSION: ΔVC performs poorly in identifying patients with unilateral DD. However, a ΔVC value ≤-15 % is strongly associated with the presence of bilateral DD. These findings should be taken into account when using ΔVC in the evaluation of patients with suspected DD.

Ultrasound-Derived Diaphragm Contractile Reserve as a Marker of Clinical Status in Patients With Cystic Fibrosis.

Introduction: In patients with cystic fibrosis (CF), the monitoring of respiratory muscle activity using electromyography can provide information on the demand-to-capacity ratio of the respiratory system and act as a clinical marker of disease activity, but this technique is not adapted to routine clinical care. Ultrasonography of the diaphragm could provide an alternative, simpler and more widely available alternative allowing the real-time assessment of the diaphragm contractile reserve (DCR), but its relationship with recognized markers of disease severity and clinical outcomes are currently unknown. Methods: Stable patients with CF were prospectively recruited. Diaphragm ultrasound was performed and compared to forced expiratory volume in 1 s (FEV1), residual volume (RV), handgrip strength, fat-free mass index (FFMI), serum vitamin levels, dyspnea levels and rate of acute exacerbation (AE). Diaphragm activity was reported as DCR (the ratio of tidal-to-maximal thickening fractions, representing the remaining diaphragm contractility available after tidal inspiration) and TFmax (representing maximal diaphragm contractile strength). Inter-observer reliability of the measurement of DCR was evaluated using intra-class correlation analysis. Results: 110 patients were included [61 males, median (interquartile range), age 31 (27-38) years, FEV1 66 (46-82)% predicted]. DCR was significantly correlated to FEV1 (rho = 0.46, p < 0.001), RV (rho = -0.46, p < 0.001), FFMI (rho = 0.41, p < 0.001), and handgrip strength (rho = 0.22, p = 0.02), but TFmax was not. In a multiple linear regression analysis, both RV and FFMI were independent predictors of DCR. DCR, but not TFmax, was statistically lower in patients with > 2 exacerbations/year (56 ± 25 vs. 71 ± 17%, p = 0.001) and significantly lower with higher dyspnea levels. A ROC analysis showed that DCR performed better than FEV1 (mean difference in AUROC 0.09, p = 0.04), RV (mean difference in AUROC 0.11, p = 0.03), and TFmax at identifying patients with an mMRC score > 2. Inter-observer reliability of DCR was high (ICC = 0.89, 95% CI 0.84-0.92, p < 0.001). Conclusion: In patients with CF, DCR is a reliable and non-invasive marker of disease severity that is related to respiratory and extra-pulmonary manifestations of the disease and to clinical outcomes. Future studies investigating the use of DCR as a longitudinal marker of disease progression, response to interventions or target for therapy would further validate its translation into clinical practice.

Surgical Errors Happen, but Are Learners Trained to Recover from Them? A Survey of North American Surgical Residents and Fellows.

BACKGROUND: Surgical training necessitates graded supervision and supported independence in order to reach competence. In developing surgical skills, trainees can, and will, make mistakes. A key skill required for independent practice is the ability to recover from an error or unexpected complication. Error recovery includes recognizing and managing a technical error in order to ensure patient safety and may be underrepresented in current educational approaches. OBJECTIVE: The purpose of this study is to explore residents' experiences and perceptions of error recovery training in surgical procedures. METHOD: An online survey was sent to surgical program directors in the United States and Canada using the Accreditation Council for Graduate Medical Education and the Royal College of Physicians and Surgeons of Canada distribution lists. Participating programs distributed the survey to their residents and fellows. The survey was composed of Likert-scale items, yes/no questions as well as open-ended questions focused on perceptions, experiences, and factors that influence to error recovery training in the operating room. RESULTS: A total of 206 surveys were completed. Overall, 99% (n = 203) agreed or strongly agreed that error recovery is an important competency for future practice. This was reflected in free-text response: "Errors can be minimized but they are inevitable, so certainly believe a surgical curriculum that addresses error recovery is of paramount importance." While 83% (n = 170) feel confident recovering from minor errors, only 34% (n = 68) feel confident that they could recover from major errors that are likely to have serious consequences on patient safety. Overall, residents do not consider that they have adequate training in error recovery, with only 37% (n = 72) felt they were adequately trained to recover from major errors. It was also mentioned "The quality of learning regarding error recovery depends entirely on the attending." CONCLUSIONS: Opportunities to learn to recover from technical errors in the operating room are valued by surgical trainees, but they perceive their training to be both inadequate and variable. This contributes to a lack of confidence in error recovery skills throughout their surgical training. There is a need to explore how best to integrate error recovery into more formal surgical curricula in order to better support learners and, ultimately, contribute to increased surgical safety.

Development and Validation of a Novel Surgical Simulation for Parotidectomy and Facial Nerve Dissection.

We present the development and validation of a low-cost novel model for training of parotid surgery. The model consists of a 3-dimensionally printed skeleton, silicone-based soft tissue, and facial nerve replicated with copper wire, circuited to indicate contact with instruments. The face validity of the simulator was evaluated with a 21-item 5-point Likert survey. Content validity was evaluated through a survey completed by the trainees after their first live parotidectomy following the simulation. Twelve residents and 6 faculty completed the simulated procedure of superficial parotidectomy after watching a video demonstration. Completion of 16 surgical steps evaluated by this model was graded for each participant. The mean ± SD total assessment score for faculty was 15.83 ± 0.41, as compared with 13.33 ± 2.06 for residents (P = .0081). The simulator as a training tool was well received by both faculty and residents (5 vs 4, P = .0206). Participants strongly agreed that junior residents would benefits from use of the model.

Practicing on the Advanced Training in Laparoscopic Suturing Curriculum (ATLAS): Is Mastery Learning in Residency Feasible to Achieve Expert-Level Performance in Laparoscopic Suturing?

BACKGROUND: Mastery learning assumes that given enough time and appropriate instructional strategies, most trainees will be able to achieve proficiency. Expert-level performance requires numerous hours of intensive and focus practice. We aimed to study whether it was possible for surgical trainees to achieve expert-derived proficiency level in laparoscopic suturing using the Advanced Training in Laparoscopic Suturing (ATLAS) curriculum over a short period of time. STUDY DESIGN: A multicenter IRB approved prospective study included surgery residents and minimally invasive fellows. Participants underwent weekly supervised instruction and assessments of ATLAS skills and self-directed practice between sessions over 12 weeks. Participants were asked to practice until they achieved previously established proficiency benchmarks of expert laparoscopic surgeons. RESULTS: Fifteen participants, PGY2 to PGY6, from 3 institutions practiced on the ATLAS curriculum. Three participants were able to achieve proficiency on the entire curriculum, with a cumulative practice time varying between 3.4 and 7.6 hours. Individual tasks had varying degrees of difficulty ranging from 85% proficiency on task 1 to 33.3% proficiency for task 6. Using a mixed-method model, the mean cumulative hours of practice to reach the benchmark threshold was estimated for each task and varied from 4.5 to 13.2 hours. The improved performance was associated with higher PGY level and proficiency in FLS. CONCLUSIONS: This study demonstrates that it is possible for some senior surgical trainees to achieve proficiency in an expert-level laparoscopic suturing curriculum. This study establishes a learning curve for each ATLAS individual task. Some learners may not be able to achieve proficiency on the entire curriculum over a short period of practice. Additional studies are needed to assess how to shorten the learning curve with effective instructional methods such as expert-guided training with immediate feedback.

Perioperative safety, feasibility, and oncologic utility of transoral robotic surgery with da Vinci Xi platform.

Transoral robotic surgery (TORS) is a common modality for treatment of oropharyngeal and laryngeal cancer. Current FDA approval extends to the da Vinci S and Si platforms. Many hospitals are adopting the da Vinci Xi platform. Reports of head and neck surgical outcomes with this platform are scant. This study reports outcomes of TORS procedures performed with the da Vinci Xi platform including perioperative adverse events, functional outcomes, and short-term local control. A retrospective review of TORS performed with the da Vinci Xi platform is undertaken. Twenty-two consecutive TORS cases with the Xi platform are reviewed. Procedures performed include radical tonsillectomy, base of tongue resection, and lingual tonsillectomy. Two bleeding events occurred (9% of cases), both of intermediate severity as per Mayo criteria. Three procedures resulted in positive margin status, early in the case series, and two were cleared with revision resection. One-year local control rate, where available, is 100%. There were no perioperative deaths, long-term gastrostomy dependence, or performance of tracheostomy. Advantages of this platform include ease of robot deployment and setup. Disadvantages include increased width of instrumentation compared with previous platforms with crowding of access. The availability of a specific robotic platform may be dictated by hospital-wide policy across service lines. This report suggests that the da Vinci Xi permits performance of TORS with safety and oncologic outcomes similar to previous platforms; however, long-term follow-up is needed.

Free versus pedicled flaps for reconstruction of head and neck cancer defects: a systematic review.

OBJECTIVE: The present review focuses on comparative studies of reconstruction with free flaps (FF) versus pedicled flaps (PF) after oncologic resection. METHOD: A systematic review was developed in compliance with PRISMA guidelines and performed using the Pubmed, Medline, EMBASE, Amed and Biosis databases. RESULTS: A total of 30 articles were included. FF are associated with a longer operative time, a higher cost and a higher incidence of postoperative revisions compared to PF. FF are associated with a longer stay at the intensive care unit than the supraclavicular artery island flap (SCAIF) and with a more extended hospital stay compared to the submental island flap (SMIF). FF are associated with fewer infections and necrosis compared to the pectoralis major myocutaneous flap (PMMF). CONCLUSION: The comparison of both type of flaps is limited by the inherent design of the studies included. In sum, FF seem superior to the PMMF for several outcomes. SMIF and SCAIF compare favorably to FF for some specific indications achieving similar outcomes at a lower cost.

Rapid relief of a postcardiotomy tamponade by manual subxiphoid decompression: a useful approach in the intensive care unit.

This case report presents a manual decompression technique used to decompress a postoperative tamponade compressing right chambers. It consists of lateral movements following subxiphoid finger insertion. This is an accessible procedure to rapidly stabilize the haemodynamics of the patient in the intensive care unit to buy time before operating room (OR) revision.

Clampless myocardial revascularization on a healed iatrogenic aortic dissection.

Iatrogenic aortic dissection is an infrequent complication of cardiac catheterization (0.03-0.06%) associated with up to 19% of mortality at 30 days. It was reported to mostly occur when using a 6-Fr guiding catheter to cannulate the right coronary artery. This life-threatening complication usually requires early surgical management and close imaging monitoring and control of systolic blood pressure. This case report describes a patient with iatrogenic aortic dissection during cardiac catheterization in symptomatic coronary artery disease. Conservative management of the limited non-progressive aortic dissection was chosen followed by surgical revascularization with a clampless technique, despite the recent aortic injury.

Tamponade Relief by Active Clearance of Chest Tubes.

PURPOSE: Chest tubes are used in every case of cardiac surgery to evacuate shed blood from around the heart and lungs. Chest tubes can become partially or totally occluded, leading to tamponade. The purpose of this article is to discuss a novel method of maintaining chest tube patency in the early recovery after cardiothoracic surgery. DESCRIPTION: The PleuraFlow Active Clearance Technology is a system to prevent chest tube clogging that can be used to help routinely maintain chest tube patency at the bedside in the intensive care unit. EVALUATION: A patient exhibited physiologic tamponade that was confirmed by transthoracic echocardiography. The chest tube was successfully reopened by actively clearing the chest tube using Active Clearance Technology, resulting in resolution of the tamponade. CONCLUSIONS: The present study reports the case of a patient with massive postoperative pericardial effusion with tamponade, successfully managed by active clearance chest tube. Further studies will help define the role for this technology in routine cardiac surgery.