Surgical Video Research Articles

Extended Dehydration of Corneal Allogenic Intrastromal Ring Segments to Facilitate Insertion: The Corneal Jerky Technique.

The aim of this study was to describe a new technique to facilitate the insertion of corneal allogenic intrastromal ring segments. A single-segment corneal allogenic intrastromal ring segment (CAIRS) was trephined from donor corneas and allowed to markedly dehydrate for 75 minutes before the start of the procedure with a room humidity of 35% to 45%. The duration of the insertion step and the intrastromal segment size at 1 week as measured by optical coherence tomography were compared with previously performed single-segment CAIRS procedures using the conventional technique. A total of 41 eyes of 36 patients underwent 1-segment CAIRS insertion of the same trephination size (750 µm). Fifteen eyes underwent the conventional insertion procedure, and 26 eyes had a dehydrated segment inserted. The time taken to insert the CAIRS analyzed by surgical video recording starting after the femtosecond tunnel creation and initiation of the insertion to the segment ironing step was 282 ± 103 and 97 ± 23 seconds for the conventional and the dehydrated segment technique, respectively ( P < 0.001). Anterior segment optical coherence tomography performed 1 week postoperatively revealed similar segment thickness and width of 471.3 ± 54.1 μm and 1285.1 ± 191.0 μm for the conventional allogenic segments and 483.4 ± 58.3 μm and 1227.2 ± 165.2 μm for the dehydrated segments ( P = 0.515 and 0.314, respectively). Markedly dehydrated corneal allogenic segments are easier and faster to insert than the nondehydrated ones while maintaining similar sizes intrastromally. This dehydration technique makes the procedure similar to the one with synthetic segments and hence reduces the learning curve.

A spatio-temporal network for video semantic segmentation in surgical videos.

Semantic segmentation in surgical videos has applications in intra-operative guidance, post-operative analytics and surgical education. Models need to provide accurate predictions since temporally inconsistent identification of anatomy can hinder patient safety. We propose a novel architecture for modelling temporal relationships in videos to address these issues. We developed a temporal segmentation model that includes a static encoder and a spatio-temporal decoder. The encoder processes individual frames whilst the decoder learns spatio-temporal relationships from frame sequences. The decoder can be used with any suitable encoder to improve temporal consistency. Model performance was evaluated on the CholecSeg8k dataset and a private dataset of robotic Partial Nephrectomy procedures. Mean Intersection over Union improved by 1.30% and 4.27% respectively for each dataset when the temporal decoder was applied. Our model also displayed improvements in temporal consistency up to 7.23%. This work demonstrates an advance in video segmentation of surgical scenes with potential applications in surgery with a view to improve patient outcomes. The proposed decoder can extend state-of-the-art static models, and it is shown that it can improve per-frame segmentation output and video temporal consistency.

Purely endoscopic and endoscope-assisted approaches to lesions of the third ventricle in pediatric age-a technical collection.

One of the main difficulties in third ventricle surgery is its deep and central location within the brain, surrounded by many eloquent neurovascular structures. Such anatomical environment obviously makes it very hard to safely approach and excise lesions in there. The introduction of the surgical microscope into the neurosurgical field undoubtedly played an important and pivotal role in improving the surgical results and increasing the safety of operations in and around the third ventricle. Although the surgical microscope remained the gold standard of intraoperative visualization for many decades, the advent of endoscopes revolutionized surgery of the third ventricle. Neuroendoscopic procedures for lesions of the third ventricle encompass a greatly variable array of endochannel, endoscope-assisted and endoscope-controlled techniques. In this collection on purely endoscopic and endoscope-assisted approaches to lesions of the third ventricle in pediatric age, the readership is presented with a selected group of these operations performed by experts in the field, shedding light mainly on their technical aspects and surgical pearls. The text description in each article is supplemented by a surgical video.

Clipping of Unruptured Anterior Choroidal Artery Aneurysms Together with Small Branches: Safety Confirmation Using Intraoperative Indocyanine Green Video-Angiography and Intraoperative Neurophysiological Monitoring

In treating anterior choroidal artery (AChA) aneurysms, preserving the AChA main trunk is of course necessary to prevent postoperative ischemic complications. However, in practice, complete occlusions are often limited by small branches. We aimed to demonstrate that even in cases where complete occlusion of the AChA aneurysm is complex due to small branches, complete occlusion can be safely achieved using indocyanine green video-angiography and intraoperative neurophysiological monitoring (IONM). We performed a retrospective review of all unruptured AChA aneurysms surgically treated at our institution from 2012 to 2021. All available surgical videos were reviewed to find AChA aneurysms clipped with small branches; clinical and radiological data were collected for these cases. Among 391 cases of unruptured AChA aneurysms treated surgically, 25 AChA aneurysms were clipped with small branches. AChA-related ischemic complications occurred in 2 cases (8%) without retrograde indocyanine green filling to the branches. These 2 cases had changes in IONM. There were no ischemic complications in the remaining cases with retrograde indocyanine green filling to the branches and no change in IONM. During an average follow-up of 47months (12-111months), a small residual neck was observed in 3 cases (12%) and recurrence or progression of the aneurysm was observed in only 1 case (4%). The surgical treatment of AChA aneurysms carries the risk of devastating ischemic complications. Even in cases where complete clip ligation seems impossible due to small branches associated with AChA aneurysms, complete occlusion can be safely achieved using indocyanine green video-angiography and IONM.

Ankle-Brachial Index, CT Angiography, and Proximal Tibial Traction for Gunshot Femoral Fracture

Watch this narrated surgical video of calculating the ankle-brachial index, evaluating CT angiography, and performing proximal tibial traction for pain management on a patient who sustained a GSW and femoral fracture.

Robotic management of isolated endometriosis of sciatic nerve: a reproducible approach that can guide through the labyrinth of pelvic neuroanatomy

To present the robotic, standardized, and reproducible surgical technique we routinely use in our center to manage isolated endometriosis of the sciatic nerve. Surgical video article. Tertiary referral center. A 36-year-old woman suffering from left-sided sciatica pain was diagnosed with an isolated endometriotic nodule of the left sciatic nerve at preoperative assessment. The patient included in this video gave consent for publication of the video and posting of the video online, including on social media, the journal website, scientific literature websites (such as PubMed, ScienceDirect, and Scopus), and other applicable sites. Complete removal of the isolated endometriotic nodule of the sciatic nerve may be performed through a stepwise robotic approach. The surgery starts laterally with the opening of the iliolumbar space between the external iliac vessels and the psoas muscle, as well as the identification of the genitofemoral and obturator nerves. The lumbosacral trunk and emergence of the sciatic nerve were then identified medially and caudally to the obturator nerve. The surgery moves medially with the anterograde dissection of both the internal iliac artery and vein, which allows a safe approach to the posterior and medial limits of the nodule. Ligation of branches of internal iliac vessels directed toward the nodule may be necessary during this step. Isolation and ligation of obturator vessels are frequently required to obtain a bloodless dissection of the lateral limit of the nodule from the lateral pelvic wall. The complete removal of the nodule was then achieved using an alternating approach to all limits of the nodule previously identified, with subsequent release of the sciatic nerve. Description of the relevant pelvic neuroanatomy and the evaluation of robotic routes in the field of pelvic neurosurgery. The use of standardized techniques together with the advantages of a robotic route can make the radical excision of isolated endometriosis of the sciatic nerve reproducible, feasible, and safe. Because of the complexity of neuroanatomy and the risk of severe complications, this surgery remains challenging, and patients affected by deep infiltrating endometriosis involving retroperitoneal neural structures should be referred to multidisciplinary management in expert centers.

Preserving privacy in surgical video analysis using a deep learning classifier to identify out-of-body scenes in endoscopic videos

Surgical video analysis facilitates education and research. However, video recordings of endoscopic surgeries can contain privacy-sensitive information, especially if the endoscopic camera is moved out of the body of patients and out-of-body scenes are recorded. Therefore, identification of out-of-body scenes in endoscopic videos is of major importance to preserve the privacy of patients and operating room staff. This study developed and validated a deep learning model for the identification of out-of-body images in endoscopic videos. The model was trained and evaluated on an internal dataset of 12 different types of laparoscopic and robotic surgeries and was externally validated on two independent multicentric test datasets of laparoscopic gastric bypass and cholecystectomy surgeries. Model performance was evaluated compared to human ground truth annotations measuring the receiver operating characteristic area under the curve (ROC AUC). The internal dataset consisting of 356,267 images from 48 videos and the two multicentric test datasets consisting of 54,385 and 58,349 images from 10 and 20 videos, respectively, were annotated. The model identified out-of-body images with 99.97% ROC AUC on the internal test dataset. Mean ± standard deviation ROC AUC on the multicentric gastric bypass dataset was 99.94 ± 0.07% and 99.71 ± 0.40% on the multicentric cholecystectomy dataset, respectively. The model can reliably identify out-of-body images in endoscopic videos and is publicly shared. This facilitates privacy preservation in surgical video analysis.

Flattening the Curve and Cutting Corners-Pearls and Pitfalls Facial Gender Affirming Surgery.

This is an experiential article based on the past 6years experience of providing facial gender confirmation surgery (fGAS) at an academic medical center. While trainees are getting increasing exposure to aspects of facial gender affirming surgery (fGAS), the gap between trained providers and patients who can access care is currently still widening. A handful of fellowships across the country have emerged that include fGAS in their curriculum, but it will take another decade before the principles of affirming care and surgeries are systematically taught. Fortunately, the surgical principles and techniques required to perform fGAS are part of the skill set of any specialty surgeon trained in adult craniofacial trauma and esthetic facial surgery/rhinoplasty. It is the aim of this article to provide directly applicable knowledge with the goal to assist surgeons who consider offering fGAS in flattening the learning curve and hopefully contribute to increasing the quality of care provided for the transgender and gender diverse population. We hope to provide the reader with a very tangible article with the aims to 1) provide a simple systematic framework for an affirming consultation and preoperative assessment and 2) provide translatable surgical pearls and pitfalls for forehead feminization and gonial angle resection. The frontal sinus set back and gonial angle resection in our opinion are the most unique aspect to fGAS as rhinoplasty, genioplasty and other associated procedures (e.g., fat grafting) follow well established principles. We hope that the value of this article lies in the translatability of the presented principle to any practice setting without the need for VSP, special surgical instruments or technology beyond basic craniofacial tools. This is an experiential article based on the senior authors 6year experience offering fGAS in an academic setting. The article is structured to outline both pearls and pittfalls and is supplemented by photographs and a surgical video. A total of 19 pearls and pitfalls are outlined in the article. Facial gender affirming surgery mostly follows established craniofacial and esthetic surgery principles. Forehead feminization and gonial angle feminization are the 2 components that diverge most from established surgical techniques and this article hopefully provides guidance to shorten the learning curve of surgeons.

A Multi-institution Study on the Association of Virtual Reality Skills with Continence Recovery after Robot-assisted Radical Prostatectomy

BackgroundVirtual reality (VR) simulators are increasingly being used for surgical skills training. It is unclear what skills are best improved via VR, translate to live surgical skills, and influence patient outcomes. ObjectiveTo assess surgeons in VR and live surgery using a suturing assessment tool and evaluate the association between technical skills and a clinical outcome. Design, setting, and participantsThis prospective five-center study enrolled participants who completed VR suturing exercises and provided live surgical video. Graders provided skill assessments using the validated End-To-End Assessment of Suturing Expertise (EASE) suturing evaluation tool. Outcome measurements and statistical analysisA hierarchical Poisson model was used to compare skill scores among cohorts and evaluate the association of scores with clinical outcomes. Spearman’s method was used to assess correlation between VR and live skills. Results and limitationsTen novices, ten surgeons with intermediate expertise (median 64 cases, interquartile range [IQR] 6–80), and 26 expert surgeons (median 850 cases, IQR 375–3000) participated in this study. Intermediate and expert surgeons were significantly more likely to have ideal scores in comparison to novices for the subskills needle hold angle, wrist rotation, and wrist rotation needle withdrawal (p < 0.01). For both intermediate and expert surgeons, there was positive correlation between VR and live skills for needle hold angle (p < 0.05). For expert surgeons, there was a positive association between ideal scores for VR needle hold angle and driving smoothness subskills and 3-mo continence recovery (p < 0.05). Limitations include the size of the intermediate surgeon sample and clinical data limited to expert surgeons. ConclusionsEASE can be used in VR to identify skills to improve for trainee surgeons. Technical skills that influence postoperative outcomes may be assessable in VR. Patient summaryThis study provides insights into surgical skills that translate from virtual simulation to live surgery and that have an impact on urinary continence after robot-assisted removal of the prostate. We also highlight the usefulness of virtual reality in surgical education.

TAToo: vision-based joint tracking of anatomy and tool for skull-base surgery.

Tracking the 3D motion of the surgical tool and the patient anatomy is a fundamental requirement for computer-assisted skull-base surgery. The estimated motion can be used both for intra-operative guidance and for downstream skill analysis. Recovering such motion solely from surgical videos is desirable, as it is compliant with current clinical workflows and instrumentation. We present Tracker of Anatomy and Tool (TAToo). TAToo jointly tracks the rigid 3D motion of the patient skull and surgical drill from stereo microscopic videos. TAToo estimates motion via an iterative optimization process in an end-to-end differentiable form. For robust tracking performance, TAToo adopts a probabilistic formulation and enforces geometric constraints on the object level. We validate TAToo on both simulation data, where ground truth motion is available, as well as on anthropomorphic phantom data, where optical tracking provides a strong baseline. We report sub-millimeter and millimeter inter-frame tracking accuracy for skull and drill, respectively, with rotation errors below [Formula: see text]. We further illustrate how TAToo may be used in a surgical navigation setting. We present TAToo, which simultaneously tracks the surgical tool and the patient anatomy in skull-base surgery. TAToo directly predicts the motion from surgical videos, without the need of any markers. Our results show that the performance of TAToo compares favorably to competing approaches. Future work will include fine-tuning of our depth network to reach a 1mm clinical accuracy goal desired for surgical applications in the skull base.

Deep learning algorithm for automatic prediction of visceral pleural invasion of lung cancer based on surgical video.

e20578 Background: Visceral pleural invasion (VPI) is an important prognostic indicator in lung cancer that is difficult to predict. We aimed to develop a deep learning algorithm that predicts VPI using videos of lesions. Methods: We included 346 patients who underwent thoracoscopic surgery at our department from 2015 to 2021, corresponding to 3800 images. The patient data and image data were divided into training set, validation set and testing set. The algorithm was developed based on the ResNet architecture used for image feature extraction and classification. All images were labeled for lesions and processed to fit the algorithm. We recruited two thoracic attendings and one radiologist to identify VPI using intraoperative video and preoperative CT, respectively. The performance of the algorithm was evaluated by comparison with the performance of the attendings and the radiologist. Results: At the patient level, the algorithm had satisfactory AUC values in the training set (0.85), validation set (0.83) and testing set (0.81). The DeLong test showed statistic difference between the algorithm and two attendings and a radiologist in the training set (p &lt; 0.001, p &lt; 0.001, p &lt; 0.001), validation set ( p= 0.006, p= 0.002, p= 0.026) and testing set ( p= 0.008, p= 0.012, p= 0.007). At the image level, the algorithm also outperformed two attendings and a radiologist with significantly great AUC values in the training set (0.83 vs. 0.52 vs. 0.53 vs. 0.65; p&lt; 0.001, p&lt; 0.001, p&lt; 0.001), validation set (0.78 vs. 0.50 vs. 0.54. vs. 0.68; p&lt; 0.001, p&lt; 0.001, p= 0.048) and testing set (0.79 vs. 0.53 vs. 0.60 vs. 0.58; p&lt; 0.001, p&lt; 0.001, p&lt; 0.001). Conclusions: The video-based deep learning algorithm could satisfactorily predict VPI and achieved expert-level performance better than thoracic attending surgeons and the radiologist we recruited.

Impact of inverted internal limiting membrane-flap technique on functional outcome and structural restoration of small and medium size macular holes.

To evaluate the impact of the inverted internal limiting membrane (ILM)-flap technique on the visual outcome and anatomical recovery for small (<250 μ), medium (<400 μ), and large (>400 μ) macular holes (MHs). Retrospective study included consecutive idiopathic MH cases operated on using the inverted ILM-flap technique. Clinical data were retrieved from electronic medical records (EMRs), surgical videos, and optical coherence tomography (OCT) machines. Eyes with axial length >25 mm, coexisting macular diseases, and follow-up <6 weeks were excluded. Data included the presence or absence of ILM flap and restoration of External Limiting Membrane (ELM), Ellipsoid Zone (EZ) lines. Mean visual improvement and structural recovery were compared between eyes showing ILM flap and those showing no flap in three MH size groups. Forty eyes of 38 patients with a mean age of 62.7 ± 10.1 years and a mean MH diameter of 348 ± 152 μm were included. The mean follow-up was 527 ± 478 days with anatomical closure observed in all eyes. Mean best-corrected visual acuity (BCVA) improved significantly from 0.87 ± 0.38 to 0.35 ± 0.26. ILM flap was visible in 29 (72.5%) all MHs, 7 (53.8%) small MHs (n = 13), 8 (61.5%) medium MHs (n = 13), and 14 (100%) large MHs (n = 14). The mean BCVA change was 0.47 ± 0.34, 0.53 ± 0.48, and 0.56 ± 0.20 in large, medium, and small MHs, respectively, and the difference between eyes showing ILM flap versus no flap in each MH size group was not statistically significant (P > 0.05). However, for medium MHs, it was higher in the ILM flap (0.66 ± 0.52) group compared to the no flap (0.32 ± 0.37) group. One eye with small MH developed significant gliosis resulting in reduced BCVA. ELM was restored in all eyes with small and medium MHs. We observed that the ILM flap did not adversely affect anatomical and visual outcomes for MHs <400 μm. Restoration of ELM suggests minimal interference in structural recovery by an ILM flap.

Successful Intraductal Sialolithiasis Removal Using Sialendoscopy: A Case Report and Surgical Video Tips

Introduction: Sialolithiasis is major cause of the obstructive salivary gland disease, accounting for ~60% of all cases. Other etiologies include strictures, mucoid debris, anatomic ductal abnormalities, and scar tissue.1 About 80% to 95% of sialolithiasis cases occur in the submandibular gland, 5% to 20% in the parotid gland, and only 1% to 2% in the remaining glands. The treatment of the obstructive salivary gland has evolved in the past 25 years with the introduction of thin semiflexible endoscopes and microinstruments such as forceps, baskets, wires, lasers, and balloons. These advancements allow for sialendoscopy and other intraductal manipulations including stone removal, dilatation of strictures, and cleansing of mucus plugs.2 In addition, these procedures can be used in combination with minimally invasive external approaches.3 Sialendoscopy is the main option for effectively treating these obstructive conditions, leading to improvements in overall quality of life.4 The objective of the surgical video is to clarify the basic steps involved in effectively removing intraductal sialolithiasis. Materials and Methods: A 36-year-old man presented with complaints of pain, swelling, and difficulty swallowing during meals, in the right submandibular salivary gland area. The symptoms had been present for the past 2 years and had worsened progressively, with no improvements with analgesics. The patient had a history of drinking less water during the past 10 years, but otherwise had no remarkable medical history. During the neck clinical examination, the right submandibular gland was found to be smaller than the contralateral gland, and no atypical lymph nodes were detected. Intraoral examination revealed a palpable 8 mm sialolith in the right floor of the mouth, which caused a discharge of milky saliva on manipulation. The remaining mucosa appeared normal. A CT scan revealed a 9 mm elliptical sialolith in the middle third of the right submandibular duct, consistent with the clinical examination and suspicion of obstructive sialolithiasis. Laboratory tests were normal. As treatment, sialendoscopy was indicated. The procedure was conducted following the standards set by Marchal et al.5 The intervention was performed for both diagnostic and therapeutic interventions, using a semirigid modular sialendoscope (Karl Storz, Tuttlingen, Germany) with a diameter of 1.7 mm, along with working channel, salivary probes, conic dilatators, bougies, baskets for stones, dilatator balloons, and silastic stents to the main duct to maintain papilla patency.6 The sialolith was completely removed without any adverse events. Results: The patient recovered uneventfully postoperatively and was discharged the next day. Conclusion: Our findings support the use of sialendoscopy for obstructive sialolithiasis. Patients usually obtain a complete resolution of their clinical symptoms and the technology has a high success rate when performed by an experienced team. The patient who agreed to participate in the study has written and signed the informed consent statement. No competing financial interests exist. No funding was received for this article. Runtime of video: 4 mins 49 secs

A086 Association between Surgical Video Review and Surgeons' Willingness to Change Their Technique

A086 Association between Surgical Video Review and Surgeons' Willingness to Change Their Technique

Less is More: Surgical Phase Recognition from Timestamp Supervision.

Surgical phase recognition is a fundamental task in computer-assisted surgery systems. Most existing works are under the supervision of expensive and time-consuming full annotations, which require the surgeons to repeat watching videos to find the precise start and end time for a surgical phase. In this paper, we introduce timestamp supervision for surgical phase recognition to train the models with timestamp annotations, where the surgeons are asked to identify only a single timestamp within the temporal boundary of a phase. This annotation can significantly reduce the manual annotation cost compared to the full annotations. To make full use of such timestamp supervisions, we propose a novel method called uncertainty-aware temporal diffusion (UATD) to generate trustworthy pseudo labels for training. Our proposed UATD is motivated by the property of surgical videos, i.e., the phases are long events consisting of consecutive frames. To be specific, UATD diffuses the single labelled timestamp to its corresponding high confident ( i.e., low uncertainty) neighbour frames in an iterative way. Our study uncovers unique insights of surgical phase recognition with timestamp supervision: 1) timestamp annotation can reduce 74% annotation time compared with the full annotation, and surgeons tend to annotate those timestamps near the middle of phases; 2) extensive experiments demonstrate that our method can achieve competitive results compared with full supervision methods, while reducing manual annotation costs; 3) less is more in surgical phase recognition, i.e., less but discriminative pseudo labels outperform full but containing ambiguous frames; 4) the proposed UATD can be used as a plug-and-play method to clean ambiguous labels near boundaries between phases, and improve the performance of the current surgical phase recognition methods. Code and annotations obtained from surgeons are available at https://github.com/xmed-lab/ TimeStamp-Surgical.

Analysis of transurethral resection of prostate videos on YouTube™: Educational quality assessment.

Our aim was to evaluate the educational value of transurethral resection of prostate (TURP) videos on YouTube. A comprehensive search was conducted for TURP videos on YouTube. Based on the Laparoscopic Surgery Video Educational Guidelines we created a checklist which includes 20 items for evaluation of the videos. IBM SPSS statistics was used for analysis. A total of 104 surgical videos were assessed. The mean view count was 15647.3 (21-324.522, SD 47556.4). Video image quality found as low for 57.7% of videos. Both staff (76%) and resident (75%) rated most of the videos low educational quality. No statistically significant difference was found between staff's total points (mean 4.35 ± SD 2.9) and resident's total points (mean 4.63 ± SD 3.3) (p: 0.761). Positive correlation was found between view count and staff's total points (r: 0.242 p < 0.05), resident's total points (r: 0.340 p < 0.01). There was also positive correlation between number of likes and staff's total points (r: 0.375 p < 0.01) and resident's total points (r: 0.466 p < 0.01). Most TURP surgical videos on YouTube are low quality. Higher educational quality videos with detailed explanation of the procedure are needed on this subject. We believe this study could be a guide for future high quality TURP videos.

Using hand pose estimation to automate open surgery training feedback.

This research aims to facilitate the use of state-of-the-art computer vision algorithms for the automated training of surgeons and the analysis of surgical footage. By estimating 2D hand poses, we model the movement of the practitioner's hands, and their interaction with surgical instruments, to study their potential benefit for surgical training. We leverage pre-trained models on a publicly available hands dataset to create our own in-house dataset of 100 open surgery simulation videos with 2D hand poses. We also assess the ability of pose estimations to segment surgical videos into gestures and tool-usage segments and compare them to kinematic sensors and I3D features. Furthermore, we introduce 6 novel surgical dexterity proxies stemming from domain experts' training advice, all of which our framework can automatically detect given raw video footage. State-of-the-art gesture segmentation accuracy of 88.35% on the open surgery simulation dataset is achieved with the fusion of 2D poses and I3D features from multiple angles. The introduced surgical skill proxies presented significant differences for novices compared to experts and produced actionable feedback for improvement. This research demonstrates the benefit of pose estimations for open surgery by analyzing their effectiveness in gesture segmentation and skill assessment. Gesture segmentation using pose estimations achieved comparable results to physical sensors while being remote and markerless. Surgical dexterity proxies that rely on pose estimation proved they can be used to work toward automated training feedback. We hope our findings encourage additional collaboration on novel skill proxies to make surgical training more efficient.

Pro-Act substitution for mechanical rupture of the periurethral balloon: Step-by-step surgical education video

Stress urinary incontinence (SUI) is a feared complication after radical prostatectomy because it impacts on the quality of life and determines a high rate of emotional distress (Nash et al., 2018 [1]).When the conservative approach in terms of behavioral, physical (pelvic-floor rehabilitation) and pharmacological treatments fails, a surgical management is usually recommended to treat the post-prostatectomy stress urinary incontinence.The Adjustable Continence Therapy prosthesis (Pro-ACT) is a postoperatively adjustable device that aims to achieve optimal outlet resistance by progressively increasing the volume of the periurethral balloons.Furthermore, in case of mechanical rupture or balloon leakage it can be easily substituted (removed and reimplanted) in centers with experience (Finazzi Agrò et al., 2019 [2]).In this video we present the clinical case of a male patient who had undergone PRO-ACT implantation about 10 years ago. Due to the right balloon leakage, its substitution was indicated and performed under ultrasound guidance (Gregori et al., 2010 [3]).The aim of the current manuscript is to provide a description of the surgical technique. The related video shows the technique as a set of simple steps that make the surgical procedure safe and reproducible.

A methodology for the annotation of surgical videos for supervised machine learning applications.

Surgical data science is an emerging field focused on quantitative analysis of pre-, intra-, and postoperative patient data (Maier-Hein et al. in Med Image Anal 76: 102306, 2022). Data science approaches can decompose complex procedures, train surgical novices, assess outcomes of actions, and create predictive models of surgical outcomes (Marcus et al. in Pituitary 24: 839-853, 2021; Røadsch et al. in Nat Mach Intell, 2022). Surgical videos containpowerful signals of events that may impact patient outcomes. Anecessary stepbefore the deployment of supervised machine learning methodsis the development of labels for objects andanatomy. We describe a complete method for annotating videos of transsphenoidal surgery. Endoscopic video recordings of transsphenoidal pituitary tumor removal surgeries were collected from a multicenter research collaborative. These videos were anonymized and stored in a cloud-based platform. Videos were uploaded to an online annotation platform. Annotation framework was developed based on a literature review and surgicalobservations to ensure proper understanding of the tools, anatomy, and steps present. A user guide was developed to trained annotators to ensure standardization. A fully annotated video of a transsphenoidal pituitary tumor removal surgery was produced. This annotated video included over 129,826 frames. To prevent any missing annotations, all frames were later reviewed by highly experienced annotators and a surgeon reviewer. Iterations to annotated videos allowed for the creation of an annotated video complete with labeled surgical tools, anatomy, and phases. In addition, a user guide was developed for the training of novice annotators, whichprovides information about the annotation software to ensure the production of standardized annotations. A standardized and reproducible workflow for managing surgical video data is a necessary prerequisite to surgical data science applications. We developed a standard methodology for annotatingsurgical videos that mayfacilitate the quantitative analysis of videos using machine learning applications. Future work will demonstrate the clinical relevance and impact of this workflow by developingprocess modeling andoutcome predictors.

Effects of Total Intravenous Versus Inhalational Anesthesia on Bleeding During Endoscopic Ear Surgery: Preliminary Results From a Case-Control Study.

To assess the impact of the type of maintenance anesthesia on the bleeding conditions of the surgical field and hemodynamic parameters during endoscopic ear surgery (EES), comparing totally intravenous inhalational anesthesia (TIVA) with inhalational anesthesia (IA). Retrospective case-control study. Tertiary referral center. Fifteen consecutive EES cases performed with TIVA between 2019 and 2020 at our Institution were matched to a control group of patients who underwent EES with IA in the same period. Patients with American Society of Anesthesiologists IV grade, acute otitis before surgery, congenital or acquired coagulopathies, use of anti-inflammatory drugs, or antiaggregant or anticoagulant therapy in the 5 days before the intervention were excluded. Both primary and revision tympanoplasty and stapes surgery were considered. Surgical videos were reviewed to quantify the entity of bleeding according to the Modena Bleeding Score. Hemodynamic parameters during surgery were retrospectively collected. A comparison between the two groups was performed. No statistically significant differences between the two groups in terms of bleeding were found at any of time point evaluated. The tympanomeatal flap elevation resulted in the bloodiest step in both groups. Hemodynamic parameters were similar in both groups ( p > 0.05). These preliminary data do not support a significant difference in bleeding conditions and hemodynamic parameters between EES patients receiving TIVA and those receiving IA. Further studies involving a higher number of patients will improve our understanding on how maintenance anesthesia with TIVA may be beneficial in terms of bleeding control as compared with IA for patients undergoing EES.