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Fulltext LEARNING CURVE IN ESOPHAGEAL ENDOSCOPIC SUBMUCOSAL DISSECTION BY WESTERN ENDOSCOSPISTS TRAINED IN JAPAN: EXPERIENCE IN LATIN AMERICA

Aliaga Ramos J, Yoshida N, Abdul Rani R, Arantes VN

Arq Gastroenterol, 2023;60(2):208-216.
PMID: 37556747 DOI: 10.1590/S0004-2803.20230222-168

•This study aimed to assess the learning curve effect on patient's clinical outcome for EESD. Retrospective observational study, enrolling patients that underwent EESD from 2009 to 2021, divided in 2 groups. Mean procedure time was 111.8 min and 103.6 min for T1 and T2, respectively (P=0.004). The learning curve in esophageal ESD could be overcomed effectively and safely by an adequately trained Western endoscopist. Background - Esophageal endoscopic submucosal dissection (EESD) is a complex and time-consuming procedure at which training are mainly available in Japan. There is a paucity of data concerning the learning curve to master EESD by Western endoscopists. Objective - This study aimed to assess the learning curve effect on patient's clinical outcome for EESD. Methods - This is a retrospective observational study. Enrolling patients that underwent EESD from 2009 to 2021. The analysis was divided into two periods; T1: case 1 to 49 and T2: case 50 to 98. The following features were analyzed for each group: patients and tumors characteristics, en-bloc, complete and curative resection rates, procedure duration and adverse events rate. Results - Ninety-eight EESD procedures were performed. Mean procedure time was 111.8 min and 103.6 min for T1 and T2, respectively (P=0.004). En bloc resection rate was 93.8% and 97.9% for T1 and T2, respectively (P=0.307). Complete resection rate was 79.5% and 85.7% for T1 and T2, respectively (P=0.424). Curative resection rate was 65.3% and 71.4% for T1 and T2, respectively (P=0.258). Four patients had complications; three during T1 period and one during T2 period. Overall mortality rate: 0%. Conclusion - The esophageal endoscopic submucosal dissection could be performed effectively and safely by an adequately trained Western endoscopist.

Matched MeSH terms: Learning Curve*
Dual attending surgeon strategy learning curve in single-staged posterior spinal fusion (PSF) surgery for 415 idiopathic scoliosis (IS) cases

Chan CYW, Chiu CK, Ch'ng PY, Lee SY, Chung WH, Hasan MS, et al.

Spine J, 2021 07;21(7):1049-1058.
PMID: 33610804 DOI: 10.1016/j.spinee.2021.02.009

BACKGROUND CONTEXT: The implementation of a dual attending surgeon strategy had improved perioperative outcomes of idiopathic scoliosis (IS) patients. Nevertheless, the learning curve of a dual attending surgeon practice in single-staged posterior spinal fusion (PSF) surgery has not been established.
OBJECTIVE: To evaluate the surgical learning curve of a dual attending surgeon strategy in IS patients.
STUDY DESIGN: Retrospective study.
PATIENT SAMPLE: 415 IS patients (Cobb angle <90°) who underwent PSF using a dual attending surgeon strategy OUTCOME MEASURES: Primary outcomes included operative time, total blood loss, allogenic blood transfusion requirement, length of hospital stay and perioperative complication rate.
METHODS: Regression analysis using Locally Weighted Scatterplot Smoothing (LOWESS) method was applied to create the best-fit-curve between case number versus operative time and total blood loss in identifying cut-off points for the learning curve.
RESULTS: The mean Cobb angle was 60.8±10.8°. Mean operative time was 134.4±32.1 minutes and mean total blood loss was 886.0±450.6 mL. The mean length of hospital stay was 3.0±1.6 days. The learning curves of a dual attending surgeon strategy in this study were established at the 115th case (operative time) and 196th case (total blood loss) respectively (p

Matched MeSH terms: Learning Curve
Fulltext "Free Hand" or Wire Guide: To the Editor

Sinha NK, Bhardwaj A

Clin Orthop Surg, 2019 12;11(4):495.
PMID: 31788175 DOI: 10.4055/cios.2019.11.4.495
Matched MeSH terms: Learning Curve
Surgical training for anatomical endoscopic enucleation of the prostate

Teoh JY, Cho CL, Wei Y, Isotani S, Tiong HY, Ong TA, et al.

Andrologia, 2020 Sep;52(8):e13708.
PMID: 32557751 DOI: 10.1111/and.13708

Anatomical endoscopic enucleation of the prostate has been proposed as a potentially superior benign prostatic hyperplasia surgery than conventional transurethral resection of prostate. However, the learning curve of the procedure is steep, hence limiting its generalisability worldwide. In order to overcome the learning curve, a proper surgical training is extremely important. This review article discussed about various aspects of surgical training in anatomical endoscopic enucleation of the prostate. In summary, no matter what surgical technique or energy modality you use, the principle of anatomical enucleation should be followed. When one starts to perform prostate enucleation, a 50 to 80 g prostate appears to be the 'best case' to begin with. Mentorship is extremely important to shorten the learning curve and to prevent drastic complications from the procedure. A proficiency-based progression training programme with the use of simulation and training models should be the best way to teach and learn about prostate enucleation. Enucleation ratio efficacy is the preferred measure for assessing skill level and learning curve of prostate enucleation. Morcellation efficiency is commonly used to assess morcellation performance, but the importance of safety rather than efficiency must be emphasised.

Matched MeSH terms: Learning Curve
Facilitating the development of self directed learning through the design of an e-socioconstructivist learning environment (eSCLE)

Foo, Sze-yeng, Raja Maznah Raja Hussain

CREAM : Current Research in Malaysia (Penyelidikan Terkini di Malaysia), 2013;2(1):139-161.
MyJurnal

To help adults learners stay competitive in the changing work environments of the 21st century, the teaching and learning of adult learners ought to transition from the traditional didactic school of education to embrace self-directed and social forms of learning. This study proposes a conceptual framework of a mediated activity system in developing the e-socioconstructivist learning environment (eSCLE); which is a learner-centred environment incorporating the design of a physical and virtual learning space conducive for constructing knowledge and building upon existing knowledge in collaboration with others. The design of the eSCLE is a preliminary research attempt to develop instructional learning environments that reflect the unstructured seamless nature of lifelong self-directed learning. It was conducted among a cohort of Master of Instructional Technology (MIT) students enrolled in the Instructional Design and Development (IDD) Course in a local Higher Institution of Learning. Findings from survey questionnaires, content analysis, observation and interview reveal systemic tensions faced by learners in self-directing their learning in the eSCLE where it is suggested that appropriate balance and discretion in managing conflicting situations is needed. The integration of web-based technology is found to be able to scaffold self-directed learning as collaborative mediating tools where functional roles of both instructor and learner-determined web tools enable self-directed actions. Finally, the designed eSCLE is able to facilitate the development of self-directed learning as learners transition through various self-directed learning phases in a steep learning curve, towards continuous lifelong learning.

Matched MeSH terms: Learning Curve
Fulltext Robotic-assisted thyroidectomy: a new experience in anaesthesia

Adlin Dasima, A.K., Nadia Hanom, I., Siti Aznida, A.K., Rusnaini, M.K., Mohd Fahmi, Z., Mohd Nazir, M.S., et al.

Journal of Surgical Academia, 2017;7(1):51-54.
MyJurnal

This is our first experience in providing general anaesthesia for robotic-assisted thyroidectomy (RAT). It is rather a
new experience for our anaesthetic team and few issues should be addressed. The conduct of RAT must be fully
understood and familiarized as it may present with few challenges for the anaesthesiologists. The key point of
success during this learning curve period is the importance of teamwork between the anaesthesiologists and the
operating surgeons. The specific anaesthetic challenges include limited access to the patient post-docking of the
robot, the need of extra precautions of the anaesthetic circuit and IV line connections, a vigilant anaesthesiologists
and options for postoperative pain relief.

Matched MeSH terms: Learning Curve
When is POEM truly equivalent to LHM? A comparison of complication rates during the learning curve

Wong WJ, Affendi NANM, Siow SL, Mahendran HA, Lau PC, Ho SH, et al.

Surg Endosc, 2023 Mar;37(3):1735-1741.
PMID: 36214914 DOI: 10.1007/s00464-022-09680-2

INTRODUCTION: Per-Oral Endoscopic Myotomy (POEM) is an effective treatment for Esophageal Achalasia Cardia (EAC) but the endoscopic technique required is complex. As competency is crucial for patient safety, we believe that its' competency can be demonstrated when the complication rate equals that of an established procedure such as Laparoscopic Heller's Myotomy with Fundoplication (LHM + F).
METHODS: A multicentre, ambi-directional, non-randomized comparison of intra-procedural complications during the learning curve of POEM was performed against a historical cohort of LHM + F. Demographic, clinicopathological, procedural data and complications were collected. A direct head-to-head comparison was performed, followed by a population pyramid of complication frequency. Case sequence was then divided into blocks of 5, and the complication rates during each block was compared to the historical cohort.
RESULTS: From January 2010 to April 2021, 60 patients underwent LHM + F and 63 underwent POEM. Mean age was lower for the POEM group (41.7 years vs 48.1 years, p = 0.03), but there was no difference in gender nor type of Achalasia. The POEM group recorded a shorter overall procedural time (125.9 min vs 144.1 min, p = 0.023) and longer myotomies (10.1 cm vs 6.2 cm, p = 0.023). The overall complication rate of POEM was 20.6%, whereas the historical cohort of LHM + F had a rate of 10.0%. On visual inspection of the population pyramid, complications were more frequent in the earlier procedures. On block sequencing, complication frequency could be seen tapering off dramatically after the 25th case, and subsequently equalled that of LHM + F.
CONCLUSION: POEM is challenging even for experienced endoscopists. From our data, complication rates between POEM and LHM + F equalize after approximately 25 POEMs.

Matched MeSH terms: Learning Curve
CUSUM: a dynamic tool for monitoring competency in cataract surgery performance

Salowi MA, Choong YF, Goh PP, Ismail M, Lim TO

Br J Ophthalmol, 2010 Apr;94(4):445-9.
PMID: 19951939 DOI: 10.1136/bjo.2009.163063

AIMS: To apply cumulative sum (CUSUM) in monitoring performance of surgeons in cataract surgery and to evaluate the response of performance to intervention.
METHOD: A CUSUM analysis was applied to 80 phacoemulsification performed by three ophthalmic trainees and one consultant, for the occurrence of posterior capsular rupture and postoperative refracted vision of worse than 6/12 among patients without pre-existing ocular comorbidity. The CUSUM score of each consecutive procedure performed by an individual surgeon was calculated and charted on CUSUM chart. When trainees' CUSUM charts showed an unacceptable level of performance, their supervisors would give feedback and impose closer monitoring of subsequent surgeries.
RESULTS: CUSUM charts of the trainees demonstrated an initial upward followed by flattening trend. This reflects learning curves in their process of acquiring competency in phacoemulsification. In contrast, the consultant showed a flat curve indicating an ongoing maintenance of competence.
CONCLUSION: The CUSUM analysis is able to monitor and promptly detect adverse events and trends of unacceptable outcomes in cataract surgery. This objective and dynamic monitoring makes CUSUM a useful audit tool for individual surgeons, but more so for busy consultants who need to supervise trainees.

Matched MeSH terms: Learning Curve*
Injecting realism in surgical training-initial simulation experience with custom 3D models

Waran V, Narayanan V, Karuppiah R, Pancharatnam D, Chandran H, Raman R, et al.

J Surg Educ, 2014 Mar-Apr;71(2):193-7.
PMID: 24602709 DOI: 10.1016/j.jsurg.2013.08.010

The traditionally accepted form of training is direct supervision by an expert; however, modern trends in medicine have made this progressively more difficult to achieve. A 3-dimensional printer makes it possible to convert patients imaging data into accurate models, thus allowing the possibility to reproduce models with pathology. This enables a large number of trainees to be trained simultaneously using realistic models simulating actual neurosurgical procedures. The aim of this study was to assess the usefulness of these models in training surgeons to perform standard procedures that require complex techniques and equipment.

Matched MeSH terms: Learning Curve
Fulltext A study on patient's decision-making process in deciding treatment strategies: an illustration of using grounded theory approach

LOW, LEE LAN, TONG, SENG FAH, LOW, WAH YUN

Malaysian Journal of Qualitative Research, 2019;5(1):28-40.
MyJurnal

The learning curve for doing a good qualitative study is steep because qualitative methodologies are often vague and lack explicit steps. We detail the formulation of the grounded theory approach in a study of patients with type 2 diabetes mellitus who made decisions while strategizing their treatment types. This undertaking is to demonstrate how this systematic and yet flexible methods contributed to the understanding of the issue we were investigating. The process from deciding on research objectives and research questions, follow with systematic process for data collection and analysis allows us to generate a substantive theoretical model. By paying critical attention to theoretical saturation, grounded theory approach enabled us to construct all possible explanatory concepts related to decision making in strategizing diabetes treatment. We also describe the challenges throughout the whole research journey, including getting permission to interview patients, gaining the trust of research participants and staying open to the participants’ views.

Matched MeSH terms: Learning Curve
Fulltext Accuracy of handheld continuous - wave doppler ultrasound in the assessment of varicose veins

Siow, LR, Naresh G, Nik Ritza Kosai, Harunarashid H, Sutton, PA, Zainal AA

Journal of Surgical Academia, 2015;5(2):16-28.
MyJurnal

The incidence of varicose veins and the need for treatment has shown a tremendous increase over the years. Debilitating venous ulcers and dragging edemas of the lower limb with overall improvement in cosmetic results and availability of endovenous procedures has brought many patients forward for treatment. Continuous-wave handheld Doppler usage is limited by its diagnostic capabilities, thus the need to determine its real effectiveness. Benefits of using hand-held dopplers lies in its rapidity in assessment of patients, it's low running cost and short learning curve. This is important as duplex ultrasounds are not readily available in district hospitals. This study aims to determine the clinical effectiveness of hand-held continuous wave dopplers in the local setting especially in primary uncomplicated varicose articles veins. All electively referred patients with primary uncomplicated varicose veins who were referred to the Varicose Vein Clinic were evaluated with continuous-wave handheld Doppler (CWD) and duplex ultrasound (DUS) examination. The study duration was from the 1st of July to 31st of August 2013 (2 months). All patients in the study were independently evaluated with CWD and DUS in the clinic on the same day after adequate rest time. DUS was taken as the gold standard for evaluation of CWD specificity and sensitivity. The Chi-square and T-test was used to test for statistical significance. A total of 41 patients were evaluated in this study. The specificity of CWD when compared to DUS for diagnosing Sapheno-femoral junction (SFJ) was 100% and at the Sapheno-popliteal junction (SPJ) was 87%. Meanwhile sensitivity of CWD for SFJ was 75% and SPJ was 60%. The examination time with CWD was significantly faster than when compared with DUS examination with significant faster tracing times that can be achieved with CWD. CWD also significantly shorter reflux times when compared to DUS. Continuous-wave handheld doppler proves to be an indispensable clinical tool in the evaluation of SFJ and SPJ reflux in varicose veins. CWD assessment in this study was shown to be equal if not better for evaluating reflux when compared to DUS assessment for SFJ reflux. Main advantages for CWD also lie in its low running cost, rapidity in assessment and short learning curve when compared to duplex ultrasound examinations.

Matched MeSH terms: Learning Curve
Early Experience, Setup, Learning Curve, Benefits, and Complications Associated with Exoscope and Three-Dimensional 4K Hybrid Digital Visualizations in Minimally Invasive Spine Surgery

Ariffin MHM, Ibrahim K, Baharudin A, Tamil AM

Asian Spine J, 2019 Oct 15.
PMID: 31608611 DOI: 10.31616/asj.2019.0075

Study Design: Prospective observational study (n=74).
Purpose: To evaluate the learning curve for exoscope and three-dimensional (3D) 4K hybrid visualization in terms of operating time, advantages, disadvantages, and surgical complications in tubular-access minimally invasive spine surgery (MISS) and to assess surgeon satisfaction with image quality, ergonomics, and ability to perform target site treatment.
Overview of Literature: Working through tubular retractors poses a challenge. The extreme angulations during microsurgical decompression, especially contralateral decompression, require surgeons to work non-ergonomically. An exoscope allows surgeons to work ergonomically and independently of the microscope oculars as visualizations are now provided by large 3D 4K monitors. However, the value and efficacy of solely depending on an exoscope and 3D 4K monitors during microsurgical work are still unknown.
Methods: Seventy-four patients (99 levels) underwent trans-tubular MISS between March 2018 and January 2019. Five patients were excluded: one had pyogenic discitis, two had revisions, and two were trans-tubular transoral. In total, we analyzed 69 for operating time, blood loss, and complications. The learning curve graph was plotted using the surgical time for each procedure. Surgeons were asked to rate their satisfaction with image quality, ability to maintain ergonomic posture, and efficient target site treatment.
Results: For tubular microdiscectomy, the operating time plateaued after six cases, and for tubular decompression and minimally invasive transforaminal lumbar interbody fusion, the operating time plateaued after nine cases. Mean operating time was significantly reduced after the plateau. Complications included four cases of dural tear. All patients improved symptomatically, and there were no postoperative neurological deficits.
Conclusions: Use of the exoscope has a short learning curve. Surgeons benefit from improved ergonomic posture during surgery, and resident teaching appears to be good. The only drawback is the need to rearrange the operating table setup. Complications were comparable to those when using the surgical microscope. An exoscope with hybrid digital visualization provides excellent visualization, depth perception, clarity, and precision target site treatment.

Matched MeSH terms: Learning Curve
Learning Curve for a Dual Attending Surgeon Strategy in Posterior Spinal Fusion (PSF): An Analysis of 105 Severe Adolescent Idiopathic Scoliosis Patients (Cobb Angle ≥90°)

Chan CYW, Lee SY, Ch'ng PY, Chung WH, Chiu CK, Hasan MS, et al.

Spine (Phila Pa 1976), 2021 Jun 15;46(12):E663-E670.
PMID: 33306608 DOI: 10.1097/BRS.0000000000003866

STUDY DESIGN: Retrospective study.
OBJECTIVE: To assess the learning curve of a dual attending surgeon strategy in severe adolescent idiopathic scoliosis patients.
SUMMARY OF BACKGROUND DATA: The advantages of a dual attending surgeon strategy in improving the perioperative outcome in scoliosis surgery had been reported. However, the learning curve of this strategy in severe scoliosis had not been widely studied.
METHODS: A total of 105 patients with adolescent idiopathic scoliosis with Cobb angle of 90° or greater, who underwent posterior spinal fusion using a dual attending surgeon strategy were recruited. Primary outcomes were operative time, total blood loss, allogeneic blood transfusion requirement, length of hospital stay from time of operation and perioperative complications. Cases were sorted chronologically into group 1: cases 1 to 35, group 2: cases 36 to 70, and group 3: case 71 to 105. Mean operative time (≤193.3 min), total blood loss (≤1612.2 mL), combination of both and allogeneic blood transfusion were the selected criteria for receiver operating characteristic analysis of the learning curve.
RESULTS: The mean Cobb angle was 104.5° ± 12.3°. The operative time, total blood loss, and allogeneic blood transfusion requirement reduced significantly for group 1 (220.6 ± 54.8 min; 2011.3 ± 881.8 mL; 12 cases) versus group 2 (183.6 ± 36.7 min; 1481.6 ± 1035.5 mL; 3 cases) and group 1 versus group 3 (175.6 ± 38.4 min; 1343.7 ± 477.8 mL; 3 cases) (P

Matched MeSH terms: Learning Curve
Robotic thyroidectomy learning curve for beginning surgeons with little or no experience of endoscopic surgery

Park JH, Lee J, Hakim NA, Kim HY, Kang SW, Jeong JJ, et al.

Head Neck, 2015 Dec;37(12):1705-11.
PMID: 24986508 DOI: 10.1002/hed.23824

This study assessed the results of robotic thyroidectomy by fellowship-trained surgeons in their initial independent practice, and whether standard fellowship training for robotic surgery shortens the learning curve.

Matched MeSH terms: Learning Curve*
Fulltext Two-incision three-port laparoscopic cholecystectomy. A feasible and safe technique

Leow VM, Faizah MS, Mohd Sharifudin S, Letchumanan VP, Yang KF, Manisekar KS

Med J Malaysia, 2014 Jun;69(3):129-32.
PMID: 25326354 MyJurnal

OBJECTIVE: Conventional laparoscopic cholecystectomy (LC) involves the use of four ports, but the number of ports has gradually been reduced to one for cosmetic reasons. however, single-incision LC is technically demanding, and there is a substantial learning curve associated with its successful application. The aim of this clinical study was to evaluate the safety and feasibility of a less demanding alternative LC technique with a faster learning curve.

METHODS: This prospective descriptive study was performed from September 2009 to February 2011 at Sultanah Bahiyah hospital in Kedah, Malaysia. A total of 58 patients underwent two-incision threeport laparoscopic cholecystectomy (TILC), which was performed by the senior consultant hepato-pancreato-biliary surgeon and two hepato-pancreato-biliary trainees. Study end points included operative time, postoperative pain, length of hospital stay and early postoperative complications. The follow-up period was 4 weeks.

RESULTS: The overall operative time taken was 44 ± 18 minutes. none of the patients had major complication or incisional hernia postoperatively. All but one of the patients were discharged within 24 h. nonsteroidal anti-inflammatory drugs were the main postoperative analgesic used.

CONCLUSION: TILC is feasible and safe cholecystectomy technique.

Matched MeSH terms: Learning Curve
Use of the Gynecare Prolift system in surgery for pelvic organ prolapse: 1-year outcome

Vaiyapuri GR, Han HC, Lee LC, Tseng LA, Wong HF

Int Urogynecol J, 2011 Jul;22(7):869-77.
PMID: 21479713 DOI: 10.1007/s00192-011-1400-9

INTRODUCTION AND HYPOTHESIS: This retrospective study reports the 1-year outcome in women who underwent mesh-augmented Prolift surgery performed from 2006 to 2008. There were a total of 254 patients, with 128, 106 and 20 patients receiving total, anterior and posterior Prolift, respectively.
METHODS: Incidence of thigh pain was lower in 2008 compared to 2006 and 2007 (p < 0.0001). The percentage of patients requiring blood transfusions (p = 0.09), duration of IDC ≥ 7 days (p = 0.27), wound dehiscence and re-operation rate were lower in 2008 in contrast to 2006 and 2007 (p = 0.43). Only 209 patients (82.3%) were available for review at 1 year. There were two (1.0%) cases of recurrent vault prolapse.
RESULTS: The subjective and objective cure rates at 1 year after this mesh implant surgery in 2006, 2007 and 2008 were 92.1% and 92.1%; 97.0% and 92.4% and 100% and 97%, respectively. The mesh erosion rate was remarkably lower in 2008 as compared to 2007 and 2006 (p < 0.001).
CONCLUSIONS: This synthetic mesh-augmented implant surgery is effective and safe, and surgical outcome appears related to the learning curve of the surgeon.

Matched MeSH terms: Learning Curve

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