Two-dimensional (2D) versus three-dimensional (3D) laparoscopy for vaginal cuff closure by surgeons-in-training: a randomized controlled trial

The role of 3D laparoscopy in gynecology

The advent of three-dimensional (3D) laparoscopy has brought significant advancements in surgical techniques and outcomes in gynecology. This review synthesizes findings from recent studies comparing 3D laparoscopy with traditional two-dimensional (2D) methods. It highlights the advantages, challenges, and clinical outcomes associated with the adoption of 3D technology in gynecological surgeries. Key benefits of 3D laparoscopy include enhanced depth perception and spatial orientation, which lead to improved surgical precision and shorter learning curves for surgeons. Studies have demonstrated that 3D laparoscopy results in reduced operative times, less blood loss, and quicker recovery periods. Moreover, it offers significant advantages in complex procedures such as endometriosis excision and urogynecological surgeries. However, the ergonomic challenges and higher costs associated with 3D systems remain barriers to widespread adoption. Comparative studies have shown that 3D laparoscopy can be a cost-effective alternative to robotic systems, providing similar clinical outcomes. Training with 3D technology has been shown to enhance skill acquisition among trainee surgeons, suggesting that its integration into surgical training programs could be highly beneficial. Despite its advantages, further research is needed to address the ergonomic concerns and to explore the long-term cost-effectiveness of 3D laparoscopy in routine clinical practice. This review underscores the potential of 3D laparoscopy to become a standard approach in gynecological surgery, provided that ongoing technological and ergonomic improvements are made.

Comparing the impact of three-dimensional display systems and barbed V-LOC™ sutures in laparoscopic hysterectomy: A retrospective cohort study

AIM

This study aims to evaluate the impact of two-dimensional (2D) versus three-dimensional (3D) imaging systems and barbed versus standard absorbable multifilament sutures on surgical times and complications in total laparoscopic hysterectomy.

METHODS

A retrospective cohort study was conducted at a tertiary hospital between May 2020 and September 2024. Patients who underwent total laparoscopic hysterectomy were categorized into four groups based on imaging system (UltraHD-2D vs. FullHD-3D) and suture type (VICRYL™ multifilament suture interrupted figure-of-8 technique vs. V-LOC™ barbed suture running technique). Primary outcomes included vaginal cuff closure time and total operation duration. Secondary outcomes were mean suturing time, perceived difficulty, and postoperative complications.

RESULTS

A total of 159 patients were analyzed. Vaginal cuff closure time was significantly shorter with 3D imaging systems compared to 2D systems when VICRYL™ sutures were used (13.85 ± 4.30 vs. 21.17 ± 5.13 min, p < 0.001). No significant difference was observed between imaging systems when V-LOC™ barbed sutures were used. Across both systems, V-LOC™ sutures consistently reduced suturing time compared to VICRYL™ sutures (p < 0.001). Surgeon-perceived difficulty was lower with V-LOC™ sutures, particularly in 2D systems. No significant difference in complication rates was observed between groups (p = 0.188).

CONCLUSION

The use of 3D imaging systems in total laparoscopic hysterectomy significantly reduces vaginal cuff closure duration and overall operative time with VICRYL™ sutures, while V-LOC™ sutures consistently enable faster procedures across both imaging modalities. These findings suggest that 3D imaging systems and barbed sutures may enhance surgical efficiency without increasing complication rates.

A randomized cohort study on the use of 3D printed models to enhance surgical training in suturing techniques

Three-dimensional (3D) printed surgical models provide an excellent surgical training option to closely mimic real operations to teach medical students who currently rely largely on visual learning aided with simple suturing pads. There is an unmet need to create simple to complex surgical training programs suitable for medical students. A prospective cohort study was conducted on a group of 16 6th year students. They were randomly divided into two groups for suture training on a basic training pad or on unique 3D-printed intestinal anastomosis models. After 4 weeks of open and laparoscopic surgical training, exams were performed on the standardized 3D-printed model at the end of each stage to assess surgical performance including surgical time and scores. Both groups had similar skills before the start of each stage. In stage 1, both groups showed comparable learning performance, but the 3D model group performed better in Exam 1. In stage 2, the 3D model group took more time but showed significant improvements and outperformed the pad group in Exam 2 in both performance scores and time. Post-training questionnaires indicated increased interest in surgery and technical training among students using 3D models. Realistic 3D-printed models benefit surgical training, expected to become integral in teaching operative skills and techniques to medical students.

The comparison of 2D and 3D systems in total laparoscopic hysterectomy: a systematic review and meta-analysis

PURPOSE

To evaluate the existing evidence regarding the comparison between 2 and 3D systems in Total Laparoscopic Hysterectomy (TLH) in terms of surgical outcomes.

METHODS

A systematic review of electronic databases, including PubMed/MEDLINE and Web of Science, was conducted to identify relevant studies comparing 2D and 3D systems in TLH. The search employed a combination of Medical Subject Headings (MeSH) terms and keywords related to the topic. Studies meeting predefined criteria were included, while case reports and studies not directly comparing 2D and 3D systems were excluded. Two independent reviewers evaluated study eligibility and performed quality assessment. The quantitative synthesis was conducted using meta-analysis techniques.

RESULTS

A statistically significant longer operation time in the 2D group compared to the 3D group (7 studies, mean difference [MD]: 13.67, 95% confidence interval [CI] 9.35-18.00, I2 = 16%). However, no statistically significant differences were found between the groups in terms of vaginal cuff closure time (2 studies, MD: 3.22, CI - 6.58-13.02, I2 = 96%), complication rate (7 studies, odds ratio [OD]: 1.74, CI 0.70-4.30, I2 = 0%), blood loss (3 studies, MD: 2.92, CI - 15.44-21.28, I2 = 0%), and Hb drop (3 studies, MD: 0.17, CI - 0.08-0.42, I2 = 1%).

CONCLUSION

Our results revealed a significant difference favoring 3D systems in operation time, while clinical outcomes between the two systems were found to be comparable in TLH. However, further research, particularly prospective studies with larger cohorts and longer-term follow-up, along with economic analyses, is needed to provide clinicians and healthcare decision-makers with essential guidance for practice and resource allocation.

3D versus 4K laparoscopic vaginal cuff closure after hysterectomy by surgeons in training: a prospective randomised trial

Background

Technological advances in visual systems have contributed to overcoming the limitations in spatial perception of minimally invasive techniques. To date, there is a lack of literature on the advantages of 3D vision systems over 4K in laparoscopic surgery, although benefits have been observed in the training setting.

Objectives

To compare operating times, perioperative outcomes, and task achievement using 3D and 4K vision systems for vaginal cuff closure performed by residents during total laparoscopic hysterectomy (TLH). All surgeons in training have obtained the Gynaecological Endoscopic Surgical Education and Assessment (GESEA) certificate.

Materials and Methods

This is a prospective randomised trial (NCT04637022). Women undergoing total hysterectomies for benign conditions between January 2021 and November 2023 were enrolled in the study. Vaginal cuff closures were performed by surgeons in training who had obtained the second level of the GESEA programme certificate.

Results

Fifty-four patients were enrolled. There were no statistically significant differences in time between 3D and 4K vision for vaginal cuff closure (p=0.918). No statistically significant differences were observed for mean estimated blood loss (EBL) (overall: 62.85 ± 22.73mL; 3D: 65 ± 24.83mL; 4K: 61.11 ± 21.18; p=0.556) and median hospital stay (p=0.234). Three non-severe intraoperative complications in the 3D group (p=0.048) and three postoperative complications in the entire cohort (p=0.685) were reported.

Conclusions

The operating time for vaginal cuff closure performed by trainee surgeons is similar when comparing 3D vision during conventional laparoscopy and 4K vision systems. The choice of surgical vision systems may be guided by a cost analysis and surgeon preferences.

What is new?

Substantial evidence is lacking regarding the advantages of incorporating 3D vision into standard laparoscopy for gynaecological surgery. This research seeks to assess whether the 3D visual system can provide benefits as compared to 4K visualisation during laparoscopic vaginal cuff closure performed by surgeons in training within the GESEA 2 certification programme.

Long-term oncological outcomes of 3D versus 2D laparoscopic gastrectomy for gastric cancer: a randomized clinical trial

BACKGROUND

Laparoscopy-assisted gastrectomy (LG) is rapidly gaining popularity owing to its minimal invasiveness. Previous studies have found that compared with two-dimensional (2D)-LG, three-dimensional (3D)-LG showed better short-term outcomes. However, the long-term oncological outcomes in patients with locally resectable gastric cancer (GC) remain controversial.

METHODS

In this noninferiority, open-label, randomized clinical trial, a total of 438 eligible GC participants were randomly assigned in a 1:1 ratio to either 3D-LG or 2D-LG from January 2015 to April 2016. The primary endpoint was operating time, while the secondary endpoints included 5-year overall survival (OS), disease-free survival (DFS), and recurrence pattern.

RESULTS

Data from 401 participants were included in the per-protocol analysis, with 204 patients in the 3D group and 197 patients in the 2D group. The 5-year OS and DFS rates were comparable between the 3D and 2D groups (5-year OS: 70.6% vs. 71.1%, Log-rank P = 0.743; 5-year DFS: 68.1% vs. 69.0%, log-rank P = 0.712). No significant differences were observed between the 3D and 2D groups in the 5-year recurrence rate (28.9% vs. 28.9%, P = 0.958) or recurrence time (mean time, 22.6 vs. 20.5 months, P = 0.412). Further stratified analysis based on the type of gastrectomy, postoperative pathological staging, and preoperative BMI showed that the 5-year OS, DFS, and recurrence rates of the 3D group in each subgroup were similar to those of the 2D group (all P > 0.05).

CONCLUSIONS

For patients with locally resectable GC, 3D-LG performed by experienced surgeons in high-volume professional institutions can achieve long-term oncological outcomes comparable to those of 2D-LG.

REGISTRATION NUMBER

NCT02327481 ( http://clinicaltrials.gov ).

The effects of 3D/Full HD and 2D/Ultra HD imaging systems on suturing skills during total laparoscopic hysterectomy: a prospective cohort study

PURPOSE

2D/Ultra HD and 3D/Full HD imaging systems can provide surgeons with more accurate and detailed views of the surgical site. We aimed to compare the effects of 2D/Ultra HD and 3D/Full HD laparoscopy systems on laparoscopic suturing skills during total laparoscopic hysterectomy.

METHODS

In this prospective cohort study, patients were recruited from a tertiary hospital, and demographic data and surgical data were recorded. The primary outcome measures were the durations of the total operation and vaginal cuff closure. Secondary outcome measures were colpotomy duration, total number of sutures placed, duration of first, second, third and fourth sutures, mean suturing duration, total operation duration, the surgeon's perception of difficulty during the vaginal cuff suturing and complications.

RESULTS

The 3D/Full HD (n = 39) and 2D/Ultra HD (n = 42) groups were compared in terms of age, BMI, number of previous abdominal surgeries, number of previous cesarean sections, and type of delivery were examined. Both groups were considered homogeneous. The 3D/Full HD group was found to be superior in terms of colpotomy duration, duration of the first, second, and third suture, mean suturing duration, vaginal cuff closure duration, and difficulty of use compared to 2D/Ultra HD group (p < 0.05 for all).

CONCLUSION

In conclusion, the use of 3D/Full HD laparoscopy systems can lead to improved surgical outcomes in terms of colpotomy duration, duration of the first, second, and third suture, mean suturing duration, vaginal cuff closure duration, and difficulty of use compared to 2D/Ultra HD systems.

Three-dimensional vision versus two-dimensional vision on laparoscopic performance of trainee surgeons: a systematic review and meta-analysis

Laparoscopic surgery underwent great improvements during the last few years. This review aims to compare the performance of Trainee Surgeons using 2D versus 3D/4 K laparoscopy. A systematic review of the literature was done on Pubmed, Embase, Cochrane's Library and Scopus. The following words and key phrases have been searched: "Two-dimensional vision", "Three-dimensional vision", "2D and 3D laparoscopy", "Trainee surgeons". This systematic review was reported according to the PRISMA statement 2020. PROSPERO registration No. CRD42022328045. Twenty-two randomized controlled trials (RCTs) and two observational studies were included in the systematic review. Two trials were carried out in a clinical setting, and twenty-two trials were performed in a simulated setting. In studies involving the use of a box trainer, the number of errors in the 2D laparoscopic group was significantly higher than in the 3D laparoscopic group during the performance of FLS skill tasks: peg transfer (MD: -0.82; 95% CI - 1.17 to - 0.47; p < 0.00001), cutting (MD: - 1.09; 95% CI - 1.50 to - 0.69 p < 0.00001), suturing (MD: - 0.48; 95% CI - 0.83 to - 0.13 p = 0.007), However, in clinical studies, there was no significant difference in the time taken for laparoscopic total hysterectomy (MD: 8.71; 95% CI - 13.55 to 30.98; p = 0.44) and vaginal cuff closure (MD: 2.00; 95% CI - 0.72 to - 4.72; p = 0.15) between 2D group and 3D group. 3D laparoscopy facilitates learning for novice surgeons and shows improvements in their laparoscopic performance.

Laparoscopic surgery in 3D improves results and surgeon convenience in sleeve gastrectomy for morbid obesity

PURPOSE

Advanced laparoscopic procedures are still challenging. One critical issue is the lack of stereoscopic vision. The aim of this surgical study is to evaluate whether 3D vision offers any advantages for surgical performance over 2D vision during sleeve gastrectomy for morbid obesity using a laparoscopic system that allows changing between 2D and 3D optics.

METHODS

A total of 78 patients were analyzed, with 37 in the 2D group and 41 in the 3D group. Performance time, hospital stay, complications, and early outcomes were collected. To assess the quality of the 2D and 3D techniques, visual analog scales from 0 to 10 were designed, and image quality, depth of field, precision in performing tasks, and general ergonomics were measured.

RESULTS

According to the vision system used, the mean duration of surgery was 85 ± 16.8 min for patients operated on with the 2D system and 69 ± 16.9 min for those operated on with the 3D system. There were no significant differences between the overall percentages of complications according to the type of vision used. However, postoperative complications were more severe in the 2D laparoscopy group. The average length of stay was shorter for patients in the 3D group. Regarding the differences perceived by the surgeon, the depth of field and the precision of tasks were better in the 3D vision group.

CONCLUSION

The 3D system provided greater depth perception and precision in more complex tasks, enabling safer surgery. This led to a reduction in the operative time and hospital stay. Moreover, the severity of complications was less.

Operating room time savings in Germany- and UK-based hospitals with 3D- VS. 2D-imaging technology in laparoscopic surgery: Meta analysis and budget impact model - Health economic evaluation

AIMS

Opportunity cost (OC) analysis is key when evaluating surgical techniques. Operating room (OR) time is one potential source of OC in laparoscopic surgery. This study quantifies differences in OR time between 3D- and 2D-imaging technology in laparoscopic surgery, translates these into OC and models the economic impact in real-world hospitals.

METHODS

First a systematically performed literature review and meta-analysis were conducted. Then, methods to translate OR time savings into OC were theorised and a budget impact model was created. After that, the potential time savings of real-world hospital case mixes were extrapolated. Finally, the opportunity costs of not using 3D-imaging in laparoscopic surgery were evaluated.

RESULTS

Average OR time saving per laparoscopic procedure was -19.4 min (-24.3; -14.5) (-14%) in favour of 3D. The Budget Impact Model demonstrated an economic impact of using 3D-laparoscopy instead of 2D laparoscopy, ranging from £183,045-£866,316 in the British and 73,049€-437,829€ in German hospitals, modelling a mixture of cost savings and performing additional procedures (earning additional revenue).

CONCLUSION

The OC analysis revealed significant economic benefits of introducing 3D-imaging technology in laparoscopic surgery, on the basis that average procedure time is reduced. Utilising the saved OR time to perform additional procedures was the biggest driver of OC. Hospital case mix and procedure volume indicated the magnitude of the OC.

Intelligent Algorithm-Based Magnetic Resonance Imaging in Radical Gastrectomy under Laparoscope

The study focused on the influence of intelligent algorithm-based magnetic resonance imaging (MRI) on short-term curative effects of laparoscopic radical gastrectomy for gastric cancer. A convolutional neural network- (CNN-) based algorithm was used to segment MRI images of patients with gastric cancer, and 158 subjects admitted at hospital were selected as research subjects and randomly divided into the 3D laparoscopy group and 2D laparoscopy group, with 79 cases in each group. The two groups were compared for operation time, intraoperative blood loss, number of dissected lymph nodes, exhaust time, time to get out of bed, postoperative hospital stay, and postoperative complications. The results showed that the CNN-based algorithm had high accuracy with clear contours. The similarity coefficient (DSC) was 0.89, the sensitivity was 0.93, and the average time to process an image was 1.1 min. The 3D laparoscopic group had shorter operation time (86.3 ± 21.0 min vs. 98 ± 23.3 min) and less intraoperative blood loss (200 ± 27.6 mL vs. 209 ± 29.8 mL) than the 2D laparoscopic group, and the difference was statistically significant (P < 0.05). The number of dissected lymph nodes was 38.4 ± 8.5 in the 3D group and 36.1 ± 6.0 in the 2D group, showing no statistically significant difference (P > 0.05). At the same time, no statistically significant difference was noted in postoperative exhaust time, time to get out of bed, postoperative hospital stay, and the incidence of complications (P > 0.05). It was concluded that the algorithm in this study can accurately segment the target area, providing a basis for the preoperative examination of gastric cancer, and that 3D laparoscopic surgery can shorten the operation time and reduce intraoperative bleeding, while achieving similar short-term curative effects to 2D laparoscopy.

4K versus 3D total laparoscopic hysterectomy by resident in training: a prospective randomised trial

Background

The introduction of ultra-high-definition laparoscopic cameras (4K), by providing stronger monocular depth perception, could challenge the existing 3D technology. There are few available studies on this topic, especially in gynaecological setting.

Objectives

Prospective, single institution, randomised clinical trial (NCT04209036).

Materials and Methods

The two laparoscopes utilised were the 0°ULTRA Telescopes with 4K technology and the 0°3D-HD by Olympus. The surgeons were all trainees and in their last year of residency and who had obtained the certificate of first or second level of the Gynaecological Endoscopic Surgical Education and Assessment program - GESEA program. Twenty-nine patients with benign uterine pathology were enrolled.

Main outcome measures

To compare if the use three-dimensional (3D) versus ultra-high-definition laparoscopic vision system (4K) for total laparoscopic hysterectomy performed by trainees was associated with a shorter operative time.

Results

The 3D vision system did not prove to be superior to the 4K vision system. Operators reported significantly more vision-related side effects when using 3D than 4K. Completing the GESEA training program was the only factor with a positive and statistically significant impact on the overall time of the procedure, especially when greater dexterity and tissue handling were required.

Conclusions

Neither technology used proved superior to the other, although operators showed a preference for 4K over 3D due to the lower number of visual side effects. Attendance at courses on laparoscopic simulators and training programs allowed trainees to demonstrate excellent surgical skills.

Comparison of two-dimensional high-definition, ultra high-definition and three-dimensional endovision systems: an ex-vivo randomised study

BACKGROUND

Two-dimensional high-definition (2D HD) endovision system is preferred for laparoscopic surgery. Recently, new generation three-dimensional (3D) HD and ultra-HD (4K) endovision systems are introduced to improve the safety and efficacy of laparoscopic surgery. There is limited evidence on superiority of one technology over the others. This experimental trial was designed to evaluate 2D HD, 3D HD and 4K HD endovision systems in performance of standardized tasks.

METHODS

This was a randomized, cross-over experimental study. Twenty-one surgical residents who were exposed to laparoscopic surgery were enrolled. Participants were randomly assigned into three groups. Each group performed standardised tasks i.e. peg transfer, precision cutting, navigating in space and intra-corporeal suturing using 2D HD, 4K HD and 3D HD endovision systems on a box trainer. Procedures were recorded as 2D HD videos and analysed later. Participant's perceived workload was assessed using Surg-TLX questionnaire. Primary endpoints were execution time in seconds and error score. Secondary endpoint was workload assessment.

RESULTS

The 3D HD had shorter execution time compared to 2D HD and 4K HD in all tasks except precision cutting (p = 0.004, 0.03, 0.001, 0.001 and p = 0.002, 0.191, 0.006, 0.005 in peg transfer, precision cutting, navigating in space and intra-corporeal suturing respectively). The 4K HD was significantly faster than 2D HD only in navigating in space task (p = 0.002). The error score between 3D HD and 4K HD were comparable in all tasks. The 2D HD had significantly more error scores compared to 4K HD, 3D HD in peg transfer task (p = 0.005, 0.014, respectively). 3D HD had significantly less workload than 2D HD and 4K HD in most of the dimensions of Surg-TLX CONCLUSIONS: 3D HD endovision system in comparison to 2D HD and 4K HD, may lead to faster execution without compromising safety of a task and is associated with less workload.

Basic Laparoscopic Skills Training Is Equally Effective Using 2D Compared to 3D Visualization: A Randomized Controlled Trial

Reduced depth perception due to two-dimensional (2D) visualization of a three-dimensional (3D) space represents a main challenge in acquiring basic laparoscopic skills (BLS); 3D visualization might increase training efficiency. This study aimed to assess whether BLS training on a standard box trainer using 2D is at least equally effective compared to 3D. Medical students were randomized to training of Fundamentals of Laparoscopic Surgery (FLS) tasks using either 2D or 3D for four weeks. Baseline and post-training tests were performed using the assigned visualization modality. Data of 31 participants were analyzed (n = 16 2D, n = 15 3D). Baseline test scores did not differ significantly between groups; only at the peg transfer task and total scores, the 3D group performed better than the 2D group. All scores improved significantly in both groups, with post training scores not differing significantly between groups. Non-inferiority of 2D compared to 3D was demonstrated for total score improvement and improvement in all individual FLS tasks except for suturing with extracorporeal knot tying. Post training test performance did not change significantly when changing to the unfamiliar modality. In conclusion, BLS training using standard 2D is at least equally effective as with 3D, without significant disadvantages when changing to the other modality.