Novice surgeons: do they benefit from 3D laparoscopy?

Comparative Evaluation of Laparoscopic Origami Crane Training With 3D and 2D Laparoscopy: Correlation With Fundamentals of Laparoscopic Surgery Scores

Objective. This prospective comparative study evaluated the efficacy and relationship between laparoscopic origami crane training (LOCT) and the Fundamentals of Laparoscopic Surgery (FLS) score using 3D vs 2D laparoscopy.Methods. From 2020 to 2023, fourth-year medical students at Asahikawa Medical University created 20 origami cranes (1 per day) in a laparoscopic dry box. FLS scores were assessed 5 times, corresponding to every fifth crane. Primary outcomes included LOCT production time, quality, and FLS scores, analyzed using the Mann-Whitney U test and repeated-measures ANOVA.Results. Eighteen participants were divided into 2 groups: 8 in the 3D laparoscopy (3D) group and ten in the 2D laparoscopy (2D) group. At the end of the study, the 3D group (16.5 min) produced cranes significantly faster than the 2D group (27 min, P = 0.02). Repeated-measures ANOVA showed that the production time, origami crane score, and FLS score improved over time. The 3D group had a significantly shorter production time (F (1, 16) = 8, P = 0.01). The origami crane score was not significantly different between the groups (F (1, 7) = 3, P = 0.13) but tended to be higher in the 3D group. No significant differences were found in the FLS scores between the groups for any task. A significant negative correlation between LOCT production time and FLS score in both groups confirmed that shorter production time correlated with higher FLS scores.Conclusions. LOCT is effective for extraclinical laparoscopic training and correlates with FLS scores. 3D laparoscopy may help beginners develop depth perception, improve bimanual and hand-eye coordination, and enhance LOCT effectiveness.

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.

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.

3D versus 2D laparoscopic distal gastrectomy in patients with gastric cancer: a systematic review and meta-analysis

BACKGROUND

While laparoscopic gastrectomy is a prominent therapeutic approach for distal gastric cancer, the clinical benefits of 3D laparoscopy over 2D laparoscopy remain unclear. We aimed to compare the clinical outcomes of 3D laparoscopy and 2D laparoscopy for distal gastric cancer resection through a systematic review and meta-analysis.

METHODS

We searched PubMed/MEDLINE, EMBASE, and Cochrane Library databases for studies published from inception through January 2023, according to the PRISMA guidelines. The MD or RR was used to compare 3D and 2D distal gastrectomy. Random-effects meta-analysis was estimated using the inverse variance and Mantel-Haenszel method for binary outcomes and the DerSimonian-Laird estimator for continuous outcomes.

RESULTS

After reviewing 559 studies, 6 manuscripts met the inclusion criteria. The analysis included 689 patients, with 348 (50.5%) in the 3D group and 341 (49.5%) in the 2D group. 3D laparoscopic gastrectomy reduces the operative time (WMD - 28.57 min, 95% CI - 50.70 to - 6.44, p = 0.011), intraoperative blood loss (WMD - 6.69 mL, 95% CI - 8.09 to - 5.29, p < 0.001), and postoperative hospital stay (WMD - 0.92 days, 95% CI - 1.43 to - 0.42, p < 0.001). There were no significant differences in time to first postoperative flatus (WMD - 0.22 days, 95% CI - 0.50 to 0.05, p = 0.110), postoperative complications (Relative Risk 0.56, 95% CI 0.22 to 1.41, p = 0.217), and the number of retrieved lymph nodes (WMD 1.25, 95% CI - 0.54 to 3.03, p = 0.172) between 3 and 2D laparoscopic distal gastrectomy.

CONCLUSION

Our study highlights the potential advantages of 3D laparoscopy in distal gastrectomy, including shorter operative time, postoperative hospital stay, and decreased intraoperative blood loss.

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.

A role for laparoscopy in the age of robotics: a retrospective cohort study of perioperative outcomes between 2D laparoscopic radical prostatectomy vs 3DHD laparoscopic radical prostatectomy

PURPOSE

Our study compares perioperative outcomes between two-dimensional (2D) laparoscopic radical prostatectomy (LRP) and the 4th generation three-dimensional/high definition (3DHD) LRP.

METHODS

Retrospectively acquired data from patients that underwent 2D LRP (n = 75) and 3DHD LRP (n = 75) from March 2013 to October 2015 were evaluated. Procedures were performed by a single surgeon. The extra-peritoneal approach with 5 trocars was utilized. Perioperative outcomes, potency, and continence were compared between groups.

RESULTS

Patient characteristics were similar between the two groups in terms of age (p = 0.44), prostate-specific antigen (PSA) levels (p = 0.34), and Gleason scores (p = 0.14). Body mass index (BMI) was significantly higher in the 3DHD group (p = 0.0036). Postoperatively, no significant differences were observed in Hgb loss (p = 0.50), positive surgical margins (p = 1.00), and post-op Gleason scores (p = 0.30). Significant differences were observed for length of hospital stay (p < 0.001) and Jackson-Pratt (JP) drainage (p < 0.001). Regarding potency, 73.7% and 51.6% of the patients in the 3DHD and 2D groups regained potency at 6 months, respectively (p = 0.0025). Almost 43% of the patients in the 3DHD group regained continence at 1 month while for the 2D groups it was only 17.3% (p = 0.0008).

CONCLUSION

3DHD and 2D LRP have resulted in good outcomes in the perioperative periods. Our results show decreased JP drainage, shorter length of hospital stay, earlier return of urinary control, and earlier return of sexual function in the 3DHD LRP group. In lower volume centers where robotics equipment is not feasible due to economic barriers 3DHD can be safely performed as a minimally invasive alternative.

Clinical comparative study of glasses-free 3D and 2D thoracoscopic surgery in minimally invasive esophagectomy

Objective

To investigate the safety and efficacy of glasses-free three-dimensional (3D) thoracoscopic surgery in minimally invasive esophagectomy (MIE).

Methods

The clinical data of 98 patients, including 81 men and 17 women aged 45-77 years, with esophageal squamous cell carcinoma who underwent minimally invasive thoracoscopic esophagectomy from January 2017 to December 2019 [3 years, with clinical follow-up time: 1 year~4 years (2017.01-2020.12)] were retrospectively analyzed. Patients were divided into two groups according to different surgical methods including a glasses-free 3D thoracoscopic group (G-3D group: 38 patients) and a two-dimesional (2D) thoracoscopic group (2D group: 60 patients). The clinical outcome of the two groups were compared.

Results

The operation time of the thoracoscopic part in the G-3D group was significantly shorter than that in the 2D group (P<0.05). The total number of lymph node dissection in the G-3D group was more than that in the 2D group (P<0.05). The thoracic indwelling time, postoperative hospital stay, severe pulmonary infection, arrhythmia, anastomotic leakage, chylothorax, and recurrent laryngeal nerve injury were not significantly different between the two groups (P>0.05). There was also no significant difference between the two groups on the progression-free survival (P>0.05).

Conclusion

Glasses-free 3D thoracoscopic surgery for esophageal cancer is a safe and effective surgical procedure. Compared with 2D thoracoscopic MIE, glasses-free 3D thoracoscopic MIE for esophageal cancer has higher safety, more lymph node dissection, and higher operation efficiency through the optimized surgical operations. We believe that glasses-free 3D thoracoscopy for MIE is worthy of clinical promotion.

Gender benefit in laparoscopic surgical performance using a 3D-display system: data from a randomized cross-over trial

BACKGROUND

The use of 3D technique compared to high-resolution 2D-4K-display technique has been shown to optimize spatial orientation and surgical performance in laparoscopic surgery. Since women make up an increasing amount of medical students and surgeons, this study was designed to investigate whether one gender has a greater benefit from using a 3D compared to a 4K-display system.

METHODS

In a randomized cross-over trial, the surgical performance of male and female medical students (MS), non-board certified surgeons (NBCS), and board certified surgeons (BCS) was compared using 3D- vs. 4K-display technique at a minimally invasive training parkour with multiple surgical tasks and repetitions.

RESULTS

128 participants (56 women, 72 men) were included. Overall parkour time in seconds was 3D vs. 4K for all women 770.7 ± 31.9 vs. 1068.1 ± 50.0 (p < 0.001) and all men 664.5 ± 19.9 vs. 889.7 ± 31.2 (p < 0.001). Regarding overall mistakes, participants tend to commit less mistakes while using the 3D-vision system, showing 10.2 ± 1.1 vs. 13.3 ± 1.3 (p = 0.005) for all women and 9.6 ± 0.7 vs. 12.2 ± 1.0 (p = 0.001) for all men. The benefit of using a 3D system, measured by the difference in seconds, was for women 297.3 ± 41.8 (27.84%) vs. 225.2 ± 23.3 (25.31%) for men (p = 0.005). This can be confirmed in the MS group with 327.6 ± 65.5 (35.82%) vs. 249.8 ± 33.7 (32.12%), p = 0.041 and in the NBCS group 359 ± 52.4 (28.25%) vs. 198.2 ± 54.2 (18.62%), p = 0.003. There was no significant difference in the BCS group.

CONCLUSION

3D laparoscopic display technique optimizes surgical performance compared to the 2D-4K technique for both women and men. The greatest 3D benefit was found for women with less surgical experience. As a possible result of surgical education, this gender specific difference disappears with higher grade of experience. Using a 3D-vision system could facilitate surgical apprenticeship, especially for women.

Laparoscopic skills training: the effects of viewing mode (2D vs. 3D) on skill acquisition and transfer

BACKGROUND

Three-dimensional (3D) visual displays have been suggested to aid laparoscopic skills training by providing the depth cues not present in traditional two-dimensional (2D) displays. However, few studies have robustly investigated the impact of viewing mode (2D vs. 3D) on learning outcomes.

PURPOSE

To examine how viewing mode (2D vs. 3D) impacts the acquisition and transferability of basic laparoscopic skills by comparing performance between transfer and control groups on a complete proficiency-based training program.

METHOD

A counterbalanced between-subjects design was employed. Each participant was randomly allocated to one of four groups, comprising two transfer groups (trained in one viewing mode and tested in the alternate mode: the 2D → 3D and 3D → 2D groups) and two control groups (trained and tested in one viewing mode: the 2D → 2D and 3D → 3D groups). Participants completed proficiency-based training in six laparoscopic training tasks. Testing included two further repetitions of all tasks under test conditions. Objective performance measures included the total number of repetitions to reach proficiency, and total performance scores (i.e. time + error penalties across all repetitions) in training and testing.

RESULTS

The groups trained in 3D demonstrated superior training performance (i.e. less time + errors) and took fewer repetitions to reach proficiency than the groups trained in 2D. The groups tested in 3D also demonstrated superior test performance compared to those tested in 2D. However, training mode did not yield significant test differences between the groups tested in 2D (i.e. 2D → 2D vs. 3D → 2D), or between the groups tested in 3D (i.e. 3D → 3D vs. 2D → 3D).

CONCLUSION

Novices demonstrate superior performance in laparoscopic skills training using a 3D viewing mode compared to 2D. However, this does not necessarily translate to superior performance in subsequent testing or enhanced learning overall. Rather, test performance appears to be dictated by the viewing mode used during testing, not that of prior training.

A randomized controlled trial of three-dimensional versus two-dimensional imaging system on duration of surgery and mental workload for laparoscopic gastropexies in dogs

OBJECTIVE

To evaluate the effect of three-dimensional (3D) laparoscopy compared to two-dimensional (2D) laparoscopy when evaluating duration of surgery for canine intracorporeally sutured gastropexy.

STUDY DESIGN

Randomized controlled clinical trial.

ANIMALS

Thirty client-owned dogs.

METHODS

Dogs were randomized into 2D or 3D groups and underwent a three-port laparoscopic intracorporeally sutured incisional gastropexy with barbed suture. Procedures were performed by a single board-certified surgeon. Duration of surgery was recorded and workload was assessed immediately after surgery using the NASA Task Load Index (TLX).

RESULTS

Median duration of surgery was 3 min shorter for 3D versus 2D (95%CI -10 to 13; p = .51). Surgical component durations, total and component TLX scores, and intraoperative complications also did not differ between groups. In a subgroup analysis excluding the first eight cases due to presumption of a learning curve with suturing technique, total TLX score (p = .004) and all component scores were lower for 3D as compared to 2D laparoscopy, although duration of surgery did not differ (p = .20).

CONCLUSION

The use of 3D laparoscopy was not associated with shorter duration of surgery when compared to 2D laparoscopy.

CLINICAL SIGNIFICANCE

3D laparoscopy requires further investigation in veterinary medicine to determine its utility in decreasing surgical duration, surgical complications or surgeon mental or physical workload.

A secondary learning curve in 3D versus 2D imaging in laparoscopic training of surgical novices

BACKGROUND

Stereoscopic (3D) imaging can be used to facilitate the learning of basic laparoscopic tasks. Its advantages over traditional endoscopic (2D) imaging include better depth perception and spatial orientation. However, the transition between 3D and 2D imaging systems has not been previously studied. This study compares the acquisition of basic laparoscopic skills in a laparoscopic-naïve population using both imaging systems, and explores the possibility of a secondary learning curve in the transition between systems.

METHODS

26 novice learners were randomly allocated into two arms and taught to perform two basic laparoscopic tasks adopted from the fundamentals of laparoscopic surgery (FLS) curriculum, peg transfer (T1) and pattern cutting (T2) using either 2D or 3D imaging systems. These tasks were repeated until proficiency was achieved. Participants in each arm then repeated the tasks in the other viewing system (2D/3D vs 3D/2D). The parameters measured were: (a) time taken to complete the task and (b) number of attempts to achieve proficiency.

RESULTS

There was a significant shortening of time required to achieve proficiency in T2 using a 3D system (mean difference-in-differences =  - 65.4, 95% CI - 103.6 to - 27.2, t(24) =  - 3.5, p value = 0.002) but no difference between 2D and 3D imaging systems for T1, a simpler task. Sub-group analysis of T1 and T2 between the 2D/3D and 3D/2D arms showed the presence of a secondary learning curve in the 2D/3D arm for both tasks, (T1: β-estimate - 2.68, 95% CI - 3.68 to - 1.68, p value = 0.0003; T2: β-estimate - 2.45, 95% CI - 3.75 to - 1.14, p value 0.004), but in the 3D/2D arm there was a secondary learning curve only for T2. (β-estimate 2.60, 95% CI 1.45-3.76, p value 0.001) CONCLUSION: 3D imaging can be an effective tool to speed the acquisition of proficiency in basic laparoscopic tasks for novice learners, especially in more complex tasks such as pattern cutting. The skills learned in 3D imaging can translate into 2D, albeit with a secondary learning curve.

Comparative Study of the Influence of Three-Dimensional Versus Two-Dimensional Urological Laparoscopy on Surgeons' Surgical Performance and Ergonomics: A Systematic Review and Meta-Analysis

Objective: The objective of this study is to compare the use of three-dimensional (3D) vision systems with traditional two-dimensional systems in laparoscopic urological surgery, analyzing the benefits, limitations, and impact of introducing this medical technology with regard to surgical performance and the surgeon's ergonomics. Methods: A systematic review with a structured bibliographic search was conducted in the electronic libraries (PubMed and EMBASE) until August 2019 and with no language restrictions. Studies on 3D visualization technology in laparoscopic urologic surgery, randomized controlled trials, and observational comparative studies were included. Relevant data were extracted and analyzed. Results: A total of 25 articles were obtained, of which 4 were clinical studies with patients, 2 studies were carried out in experimental animal models, and the remaining 19 were conducted in simulated environments. Regarding the European training program in basic laparoscopic urological skills, the results showed no significant differences in execution time using either imaging system. Three-dimensional vision led to a significant reduction in surgery time in pyeloplasty and radical nephrectomy. In addition, there was a reported decrease in blood loss in adrenalectomy, nephron-sparing nephrectomy, radical nephrectomy, simple nephrectomy, and pyeloplasty using 3D vision. Regarding ergonomics, the studies generally described no differences in side effects (headache, nausea, eye strain) when comparing the two types of visualization systems. Surgeons reported reduced workloads and stress with 3D vision than with traditional laparoscopy. Conclusions: Three-dimensional laparoscopic systems essentially advance surgical performance in less-experienced laparoscopic surgeons. Three-dimensional laparoscopy leads to improvements in surgery time, which is important for specific surgical procedures involving intracorporeal ligatures and sutures. The results achieved on the surgeons' ergonomics showed better depth perception and decreased stress and workloads during 3D vision with no differences in potential side effects.

Laparoscopic Appendectomy Performed by junior SUrgeonS: impact of 3D visualization on surgical outcome. Randomized multicentre clinical trial. (LAPSUS TRIAL)

BACKGROUND

The purpose of this study was to evaluate the effect of 3D visualization applied to laparoscopic appendectomy (LA) performed by young surgeons (YS). We considered both operative features and clinical outcomes, aiming to highlight the benefits that this technology could bring to novice surgeons and their laparoscopic training.

METHODS

All the surgical procedures were performed by residents who had performed less than 20 appendectomies prior to the beginning of the study under the supervision of an expert surgeon. At the time of enrolment patients were randomized into two arms: Experimental arm (EA): laparoscopic appendectomy performed with laparoscopic 3D vision technology. Control arm (CA): laparoscopic appendectomy performed with the "standard" 2D technology. The primary endpoint was to find any statistically significant difference in operative time between the two arms. Differences in conversion rate, intra-operative complications, post-operative complications and surgeons' operative comfort were considered as secondary endpoints.

RESULTS

We randomized 135 patients into the two study arms. The two groups were homogeneous for demographic characteristics, BMI and ASA scores. The characteristics of clinical presentation and anatomical position showed no significant difference. The operative time was longer in the CA (57.5 vs. 49.6 min, p = 0.048, 95% CI). In the subgroup of complicated appendicitis, this trend toward inferior operative time was confirmed without reaching statistical significance (2D = 60 min, 3D = 49.5 min, p = 0.082 95% CI). No intra-operative complications were observed in either group. The conversion rate was 5.6% (4 patients) in the 2D group and 4.6% (3 patients) in 3D group.

CONCLUSION

The utilization of 3D laparoscopy was associated with reduction in operative time without influencing other parameters, in particular without altering the safety profile of the procedure.

Comparison between 3-dimensional and 2-dimensional endoscopic thyroidectomy for benign and malignant lesions: a meta-analysis

BACKGROUND

The use of 3-dimensional (3D) endoscopic thyroidectomy (ET) has been increasing, but its feasibility and safety have not been well documented for thyroidectomy. Hence, to systematically investigate the comparative outcomes during 3D-ET and 2-dimensional (2D) ET for benign and malignant lesions, we conducted this meta-analysis.

METHODS

Based on the PRISMA guidelines, a systematic database search of the PubMed, Cochrane Library, Web of Science, China National Knowledge Infrastructure (CNKI), and Chinese Wanfang databases was performed. The eligible studies were published in English and Chinese up to October 2020. The major endpoints evaluated were procedure time, blood loss, postoperative drainage, postoperative hospitalization, postoperative complications, total number of lymph node dissections (LNDs), and total cost.

RESULTS

A total of 15 relevant studies including 1190 patients (583 for 3D-ET and 607 for 2D-ET) compared the application of 3D and 2D laparoscopic systems in thyroid surgery, of which 8 were endoscopic benign thyroidectomy (EBT) and 7 were endoscopic malignant thyroidectomy (EMT). Our meta-analysis indicated that 3D-ET generally had advantages over 2D-ET in terms of procedure time (P = 0.000), blood loss (P = 0.000), postoperative drainage (P = 0.000), postoperative complications (P = 0.000), and LNDs (P = 0.006). However, there were no significant differences between the two systems in terms of total cost (P = 0.245) or postoperative hospitalization (P = 0.068). Subgroup analysis showed consistency of the overall outcomes in each subset, but a shorter postoperative hospitalization in 3D-EBT was revealed.

CONCLUSIONS

Compared to 2D-ET, 3D endoscopic thyroidectomy is an efficient, safe, and reliable method with better depth perception and stereoscopic vision, and an equally satisfactory outcome. More clinical RCTs with long-term follow-up are required to reproduce these promising results.

Three-dimensional (3D) system versus two-dimensional (2D) system for laparoscopic resection of adrenal tumors: a case-control study

PURPOSE

Laparoscopy is the standard technique for resecting adrenal tumors worldwide. The main drawbacks of conventional 2D laparoscopy are limited depth perception and tactile feedback. Currently available high-quality 3D laparoscopy systems might improve surgical outcomes for adrenalectomy. We compare the safety and efficacy of 3D versus 2D laparoscopy in the treatment of adrenal tumors.

METHODS

This case-control study analyzed prospectively collected data from patients with benign or malignant adrenal tumors treated laparoscopically at a single academic medical center between April 2003 and March 2020. We collected demographic, diagnostic, preoperative, and operative variables, and used multiple linear and logistic regression to analyze differences in various short-term outcomes between the two approaches while adjusting for potential confounders.

RESULTS

We included 150 patients: 128 with benign tumors and 22 with malignant tumors; 95 treated with 3D laparoscopy (case group); and 55 with 2D laparoscopy (control group). After adjustment for patient, surgical, and tumor characteristics, a 2D vision was associated with a longer operative time (β = 0.26, p = 0.002) and greater blood loss (β = 0.20, p = 0.047). There was no significant difference in rates of conversion to open surgery (odds ratio [OR] = 1.47 (95% CI 0.90-22.31); p = 0.549) or complications (3.6% vs. 2.1%; p = 0.624).

CONCLUSIONS

With experienced surgeons, laparoscopic adrenalectomy was safer and more feasible with the 3D system than with the 2D system, resulting in less operative blood loss and shorter operative time with no differences in rates of conversion to open surgery or postoperative complications. For adrenal tumors, 3D laparoscopy offers advantages over 2D laparoscopy.

Video-assisted thoracoscopy for lung cancer: who is the future of thoracic surgery?

As the computer processing technique and display technology evolved dramatically, the surgical approach to early-stage non-small cell lung cancer (NSCLC) has made a rapid progress within the past few years. Currently, the gold standard for NSCLC is lobectomy. After the introduction of video-assisted thoracoscopic surgery (VATS), lung resection can now be conducted mini-invasively, enabling better prognosis for patients and better operation condition for surgeons. At the very beginning, the conventional two-dimensional (2D) system enabled operators to have a closer, magnified and illuminated view inside the body cavity than open thoracotomy. With the introduction of the glasses-assisted three-dimensional (3D) and glasses-free 3D display system, multiple viewing angles were further enhanced, thus a more stable, easier to master and less invasive video-assisted thoracoscopic surgery (VATS) appeared. However, given that the standard VATS is associated with limited maneuverability and stereoscopy, it restricts the availability in more advanced cases. Hopefully, most of the limitations of standard VATS can be overcome with the robotic-assisted thoracic surgery (RATS). The RATS system consists of a remote console and a robotic unit with 3 or 4 arms that can duplicate surgeons’ movements. Also, it provides a magnified, 3D and high definition (HD) operation field to surgeons, allowing them to perform more complicated procedures. Apart from these, some new technologies are also invented in combination with the existing surgery system to solve difficult problems. It is hoped that the higher costs of innovative surgical technique can be offset by the better patient outcomes and improved benefits in cost-effectiveness.

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

BACKGROUND

Objective evidence is lacking as to the benefit of the addition of 3D vision to conventional laparoscopy in Gynecologic surgery. This study aims to compare 3-D visual system to traditional 2-D laparoscopic visualization for the laparoscopic closure of the vaginal cuff during total laparoscopic hysterectomy by surgeons-in-training [defined as senior OBGYN resident or Minimally Invasive Gynecologic Surgery (MIGS) fellow].

METHODS

51 patients undergoing total laparoscopic hysterectomy at two tertiary care academic hospitals were randomized to two-dimensional or three-dimensional vision system with cuff closure performed by surgeons-in-training. The primary outcome was the time taken for vaginal cuff closure. Secondary outcomes included peri-operative outcomes and assessment of surgeon's perception of ease of cuff closure.

RESULTS

27 (52.9%) cases were allocated to cuff closure with the 2D system and 24 (47.1%) cases to closure with the 3D vision system. Patient baseline characteristics were similar between the vision systems. Mean vaginal cuff closure time was not significantly different between 2D and 3D vision (10.1 min for 2D versus 12 min for 3D, p = 0.31). An additional 24 s was added to cuff closure time with each 1 kg/m2 increase in BMI, after controlling for potential confounders (p = 0.003). There was no difference in the surgeon rating of ease of cuff closure between 2D and 3D. Peri-operative outcomes are similar among the two groups.

CONCLUSION

We did not demonstrate any benefits of 3D vision system over conventional 2D for the task of laparoscopic vaginal cuff suturing performed by surgeons-in-training. RCT Registration Number NCT02192606 https://clinicaltrials.gov/ct2/show/NCT02192606 (July 17, 2014).

Three-dimensional vs 2-dimensional laparoscopic gastrectomy for gastric cancer: A systematic review and meta-analysis

BACKGROUND

Both 3-dimensional (3D) laparoscopic gastrectomy (LG) and 2-dimensional (2D) LG are commonly used for gastric cancer (GC). To investigate their safety and efficacy, we performed this meta-analysis.

METHODS

PubMed, The Cochrane Library, Science Direct, Embase, Scopus, and Web of Science were systematically searched to identify relevant studies. The total number of lymph node dissections (LNDs), operation time, blood loss, postoperative hospital stay, postoperative complications, and hospitalization cost were extracted as major endpoints.

RESULTS

Among 904 articles that were enrolled, 9 studies were included for analysis. The 3D group was observed to have shorter operation times [95% confidence interval (CI): -0.54 to -0.06; P = .01] and less blood loss (95% CI: -0.41 to -0.19; P < .00001) than the 2D group. Compared with the 2D group, slightly higher hospitalization cost was found in the 3D group (95% CI: 0.06-0.37; P = .008). However, the outcomes among the total LNDs, postoperative hospital stay, and postoperative complications were similar. Subgroup analysis suggested that the 3D LG group had more 11p (2.22 ± 1.80 vs 1.47 ± 1.99, P = .019) and 8a (2.52 ± 1.88 vs 1.48 ± 1.43, P = .001) LNDs compared to the 2D LG group.

CONCLUSIONS

3D LG has advantages for GC, with shorter operation times, less blood loss, and possibly more LNDs. However, the cost was slightly higher than that of 2D LG.

Added value of 3D-vision during laparoscopic biotissue pancreatico- and hepaticojejunostomy (LAELAPS 3D2D): an international randomized cross-over trial

BACKGROUND

It is currently unclear what the added value is of 3D-laparoscopy during pancreatic and biliary surgery. 3D-laparoscopy could improve procedure time and/or surgical performance, for instance in demanding anastomoses such as pancreatico- and hepaticojejunostomy. The impact of 3D-laparoscopy could be negligible in more experienced surgeons.

METHODS

We conducted a randomized controlled cross-over trial including 20 expert laparoscopic surgeons and 20 surgical residents from 9 countries (Argentina, Estonia, Israel, Italy, the Netherlands, South Africa, Spain, UK, USA). All participants performed a pancreaticojejunostomy (PJ) and a hepaticojejunostomy (HJ) using 3D- and 2D-laparoscopy on biotissue organ models according to the Pittsburgh method. Primary endpoint was the time required to complete both anastomoses. Secondary endpoint was the objective structured assessment of technical skill (OSATS; range 12-60) rating. Observers were blinded for 3D/2D and expertise.

RESULTS

A total of 40 participants completed 144 PJs and HJs. 3D-laparoscopy reduced the operative time with 15.5 min (95%CI 10.2-24.5 min), from 81.0 to 64.4 min, p = 0.001. This reduction was observed for both experts and residents (13.0 vs 22.2 min, intergroup significance p = 0.354). The OSATS improved with 5.1 points, SD ± 6.3, with 3D-laparoscopy, p = 0.001. This improvement was observed for both experts and residents (4.6 vs 5.6 points, p = 0.519). Of all participants, 37/39 participants stated to prefer 3D laparoscopy whereas 14/39 reported side effects. Minor side effects were reported by 10/39 participants whereas 2/39 participants reported severe side effects (both severe eye strain).

CONCLUSION

3D-laparoscopy, as compared to 2D-laparoscopy, reduced the operative time and improved surgical performance for PJ and HJ anastomoses in both experts and residents with mostly minor side effects.

Stereoscopic versus monoscopic displays: Learning fine manual dexterity skills using a microsurgical task simulator

We investigated the learning of fine manual dexterity with a microsurgical instrument and a new simulator in a context of microsurgery. 30 subjects were divided into two groups. One (3D group) interacted with a stereoscopic and the other (2D group) with a monoscopic display. Visual information for the displays was captured from a surgical stereomicroscope. In 20 trials, both groups performed the repetitive tasks of picking up small rods from a funnel-shaped cavity and placing them outside. In analysing learning curves, we found that the initial learning process for hand-eye coordination is easier with a 3D display, and that performance persists at a higher level of proficiency than with the 2D display option. Thus stereoscopic displays can be especially beneficial for novices, for those learning new procedures, or for providing orientation to operators facing a new or altered spatial situation. Simulators with few reliefs or spatial textures should not be used for comparison between 3D and 2D viewing conditions.

Three-dimensional endoscopy: The future of nasoendoscopic training

OBJECTIVES/HYPOTHESIS

Three-dimensional (3D) endoscopy is an emerging tool in surgery that provides real-time depth perception. Its benefits have been investigated in surgical training, but the current literature lacks significant objective outcome data. We aimed to objectively compare the efficacy of two-dimensional (2D) versus 3D high-definition endoscopes in novice users.

STUDY DESIGN

Prospective, randomized crossover study.

METHODS

Ninety-two novice medical students who used both 2D and 3D endoscopes to complete two validated tasks in a box trainer participated in the study. Time taken and error rates were measured, and subjective data were collected.

RESULTS

Wilcoxon tests showed 3D technology was significantly faster than 2D (78 vs. 95 seconds, P = .004), and errors per task were significantly lower (3 vs. 5, P < .001). Sixty-nine percent of participants preferred the 3D endoscope.

CONCLUSIONS

3D high-definition endoscopy could be instrumental in training the next generation of endoscopic surgeons. Further research is required in a clinical setting.

LEVEL OF EVIDENCE

2b Laryngoscope, 129:1280-1285, 2019.

The use of 3D laparoscopic imaging systems in surgery: EAES consensus development conference 2018

BACKGROUND

The use of 3D laparoscopic systems is expanding. The European Association of Endoscopic Surgery (EAES) initiated a consensus development conference with the aim of creating evidence-based statements and recommendations for the surgical community.

METHODS

Systematic reviews of the PubMed and Embase libraries were performed to identify evidence on potential benefits of 3D on clinical practice and patient outcomes. Statements and recommendations were prepared and unanimously agreed by an international surgical and engineering expert panel which were presented and voted at the EAES annual congress, London, May 2018.

RESULTS

9967 abstracts were screened with 138 articles included. 18 statements and two recommendations were generated and approved. 3D significantly shortened operative time (mean difference 11 min (8% [95% CI 20.29-1.72], I² 96%)). A significant reduction in complications was observed when 3D systems were used (RR 0.75, [95 CI% 0.60-0.94], I² 0%) particularly for cases involving laparoscopic suturing (RR 0.57 [95% CI 0.35-0.90], I² 0%). In 69 box trainer or simulator studies, 64% concluded trainees were significant faster and 62% performed fewer errors when using 3D.

CONCLUSION

We recommend the use of 3D vision in laparoscopy to reduce the operative time (grade of recommendation: low). Future robust clinical research is required to specifically investigate the potential benefit of 3D laparoscopy system on complication rates (grade of recommendation: high).

The use of 3D laparoscopic imaging systems in surgery: EAES consensus development conference 2018

BACKGROUND

The use of 3D laparoscopic systems is expanding. The European Association of Endoscopic Surgery (EAES) initiated a consensus development conference with the aim of creating evidence-based statements and recommendations for the surgical community.

METHODS

Systematic reviews of the PubMed and Embase libraries were performed to identify evidence on potential benefits of 3D on clinical practice and patient outcomes. Statements and recommendations were prepared and unanimously agreed by an international surgical and engineering expert panel which were presented and voted at the EAES annual congress, London, May 2018.

RESULTS

9967 abstracts were screened with 138 articles included. 18 statements and two recommendations were generated and approved. 3D significantly shortened operative time (mean difference 11 min (8% [95% CI 20.29-1.72], I² 96%)). A significant reduction in complications was observed when 3D systems were used (RR 0.75, [95 CI% 0.60-0.94], I² 0%) particularly for cases involving laparoscopic suturing (RR 0.57 [95% CI 0.35-0.90], I² 0%). In 69 box trainer or simulator studies, 64% concluded trainees were significant faster and 62% performed fewer errors when using 3D.

CONCLUSION

We recommend the use of 3D vision in laparoscopy to reduce the operative time (grade of recommendation: low). Future robust clinical research is required to specifically investigate the potential benefit of 3D laparoscopy system on complication rates (grade of recommendation: high).

Three-Dimensional Versus Two-Dimensional Video-Assisted Endoscopic Surgery: A Meta-analysis of Clinical Data

BACKGROUND

There have been no studies to systematically evaluate the two display (3D vs. 2D) systems regarding both laparoscopic and thoracoscopic surgeries in clinical settings; thus, we conducted one to evaluate the safety and efficacy of different visualization systems (two-dimensional and three-dimensional) during endoscopic surgery (laparoscopy or thoracoscopy) in clinical settings.

METHODS

A comprehensive search of online databases was performed. Perioperative outcomes were synthesized. Cumulative meta-analysis was performed to evaluate the temporal trend of pooled outcomes. Specific subgroups (laparoscopy vs. thoracoscopy, prospective vs. retrospective study, malignant vs. benign diseases) were examined. Meta-regression was conducted to explore the source of heterogeneity.

RESULTS

Twenty-three articles were considered in this analysis, of which 7 were thoracoscopic and 16 were laparoscopic surgeries. A total of 2930 patients were recorded, of which 1367 underwent 3D video-assisted surgery and 1563 underwent 2D display. Overall, significantly shorter operating time (SMD -0.69; p = <0.001), less blood loss (SMD -0.26; p = 0.028) and shorter hospital stays (SMD -0.16; p = 0.016) were found in the 3D display group. Meanwhile, the perioperative morbidity (OR 0.92; p = 0.487), retrieved lymph nodes (SMD 0.09; p = 0.081), drainage duration (SMD -0.15; p = 0.105) and drainage volume (SMD 0.00; p = 0.994) were similar between the two groups. Comparison of the overall outcomes in each subset showed consistency in all groups.

CONCLUSIONS

This up-to-date meta-analysis reveals that the 3D display system is superior to the 2D system in clinical settings with significantly shorter operating time, less blood loss and shorter hospital stay. These findings suggest that, in laparoscopic or thoracoscopic surgeries, 3D endoscopic system is preferable when condition permits. Future efforts should be made on decreasing the side effects of 3D display and increasing its cost-effectiveness.

A Suggestion on How to Compare 2D and 3D Laparoscopy: A Qualitative Analysis of the Literature and Randomized Pilot Study

BACKGROUND AND AIMS

The results of studies comparing two-dimensional (2D) and three-dimensional (3D) laparoscopy have shown variable results. We aimed to review the literature and develop an appropriate instrument to compare 2D and 3D laparoscopy. We further aimed to use the data extracted to perform a pilot study.

METHODS

Sixty-seven recent articles on 3D laparoscopy were reviewed and data extracted on factors influencing outcome variables. These variables were used to design a pilot study of 28 novices using a randomized crossover design. The results were analyzed using descriptive statistics and the Wilcoxon signed-rank tests.

RESULTS

Seven themes were identified to influence the outcome of 3D studies: applied technique (1), experience of subjects (2), study design (3), learning curve (4), subjective qualitative reports (5), laparoscopic tasks (6), and chosen outcome variables (7). The consecutively developed five laparoscopic simulation tasks contained placing a rubber band over hooks, ring and pearl transfer, threading a pipe cleaner through loops, and placing a suturise. The pilot study showed a primary benefit of 3D laparoscopy that was unrelated to repetition. Two tasks served well to assess first-time performance, and two tasks promise to serve well to assess a learning curve if performed repeatedly.

CONCLUSION

We were able to identify important issues influencing the outcome of studies analyzing 3D laparoscopy. These may help evaluate future studies. The developed tasks resulted in meaningful data in favor of 3D visualization, but further studies are necessary to confirm the pilot test results.

[3 D laparoscopy versus 2 D laparoscopy : An up to date evaluation]

BACKGROUND

The 3D laparoscopy is currently under intensive discussion. At the moment the majority of newly acquired laparoscopy systems include the 3D technique. New 4K systems, which will be offered in combination with 3D, are complicating the decision-making when buying new laparoscopic systems. The aim of the article is to show the advantages and possible limitations of 3D laparoscopy. Furthermore, the position of 3D laparoscopy in the current video market is evaluated.

MATERIAL AND METHODS

This study was based on an up to date literature search in PubMed. Concerning the question whether the 3D is replacing the 2D laparoscopy, observations from the industry and a personal evaluation were included in the analysis.

RESULTS

The current studies show clear advantages of 3D laparoscopy concerning operation time, efficiency and workload. A major proportion of the studies were conducted on simulation trainers; however, some clinical trials also confirmed these results. The learning curve in laparoscopic surgery is clearly improved with the 3D technique and 3D also seems be useful for operations by experts. The limitation is that not every surgeon can see three dimensionally. Furthermore, the set-up in the operation room needs to be optimized so that a 3D system can be successfully implemented with the nursing staff and side effects, such as exhaustion, dizziness or headache can be prevented.

CONCLUSION

The choice of video system will depend on the personal interest of the surgeon and the ability to see 3D. It can be assumed that the majority of the systems will include 3D laparoscopy but 2D laparoscopy will not be completely replaced. A dynamic development of 3D in association with 4K and robotics can be expected.

Why laparoscopists may opt for three-dimensional view: a summary of the full HTA report on 3D versus 2D laparoscopy by S.I.C.E. (Società Italiana di Chirurgia Endoscopica e Nuove Tecnologie)

Background

Three-dimensional view in laparoscopic general, gynaecologic and urologic surgery is an efficient, safe and sustainable innovation. The present paper is an extract taken from a full health technology assessment report on three-dimensional vision technology compared with standard two-dimensional laparoscopic systems.

Methods

A health technology assessment approach was implemented in order to investigate all the economic, social, ethical and organisational implications related to the adoption of the innovative three-dimensional view. With the support of a multi-disciplinary team, composed of eight experts working in Italian hospitals and Universities, qualitative and quantitative data were collected, by means of literature evidence, validated questionnaire and self-reported interviews, applying a final MCDA quantitative approach, and considering the dimensions resulting from the EUnetHTA Core Model.

Results

From systematic search of literature, we retrieved the following studies: 9 on general surgery, 35 on gynaecology and urology, both concerning clinical setting. Considering simulated setting we included: 8 studies regarding pitfalls and drawbacks, 44 on teaching, 12 on surgeons’ confidence and comfort and 34 on surgeons’ performances. Three-dimensional laparoscopy was shown to have advantages for both the patients and the surgeons, and is confirmed to be a safe, efficacious and sustainable vision technology.

Conclusions

The objective of the present paper, under the patronage of Italian Society of Endoscopic Surgery, was achieved in that there has now been produced a scientific report, based on a HTA approach, that may be placed in the hands of surgeons and used to support the decision-making process of the health providers.

Electronic supplementary material

The online version of this article (10.1007/s00464-017-6006-y) contains supplementary material, which is available to authorized users.

2D vs. 3D imaging in laparoscopic surgery-results of a prospective randomized trial

PURPOSE

3D imaging is an upcoming technology in laparoscopic surgery, and recent studies have shown that the modern 3D technique is superior in an experimental setting. However, the first randomized controlled clinical trial in this context dates back to 1998 and showed no significant difference between 2D and 3D visualization using the first 3D generation technique, which is now more than 15 years old.

METHODS

Positive results measured in an experimental setting considering 3D imaging on surgical performance led us to initiate a randomized controlled pragmatic clinical trial to validate our findings in daily clinical routine. Standard laparoscopic operations (cholecystectomy, appendectomy) were preoperatively randomized to a 2D or 3D imaging system. We used a surgical comfort scale (Likert scale) and the Raw NASA Workload TLX for the subjective assessment of 2D and 3D imaging; the duration of surgery was also measured.

RESULTS

The results of 3D imaging were statistically significant better than 2D imaging concerning the parameters "own felt safety" and "task efficiency"; the difficulty level of the procedures in the 2D and 3D groups did not differ. Overall, the Raw NASA Workload TLX showed no significance between the groups.

CONCLUSION

3D imaging could be a possible advantage in laparoscopic surgery. The results of our clinical trial show increased personal felt safety and efficiency of the surgeon using a 3D imaging system. Overall of the procedures, the findings assessed using Likert scales in terms of own felt safety and task efficiency were statistically significant for 3D imaging. The individually perceived workload assessed with the Raw NASA TLX shows no difference. Although these findings are subjective impressions of the performing surgeons without a clear benefit for 3D technology in clinical outcome, we think that these results show the capability that 3D laparoscopy can have a positive impact while performing laparoscopic procedures.

2D Versus 3D in Laparoscopic Surgery by Beginners and Experts: A Randomized Controlled Trial on a Pelvitrainer in Objectively Graded Surgical Steps

BACKGROUND AND OBJECTIVE

Progress in endoscopic surgery in the past few decades has led to the application of 3-dimensional (3D) procedures in operating rooms. This permits patient- and surgeon-friendly operations and also maximizes the superiority of laparoscopy over laparotomy. In this study, we compare 2-dimensional (2D) and 3D endoscopy techniques with regard to time, efficiency, optics, and handling by users with different degrees of experience at 4 difficulty levels.

DESIGN

A randomized controlled trial on a pelvitrainer in objectively graded surgical steps for students and postgraduates.

SETTING

The trials took place at the Kiel School of Gynaecological Endoscopy, a training unit of the Kiel University Department of Obstetrics and Gynecology, a tertiary academic medical center.

PARTICIPANTS

The 277 study participants, divided into students, residents, and specialists, worked on pelvitrainers with 2 different optical systems, the 2D full HD and the 3D mode. The following 4 exercises were performed with each optical system: (1) grasping and transferring of pins, (2) cutting predetermined marks, (3) vaginal closure with prevention of prolapse, and (4) sacrocolpopexy. The duration and success of the tasks were measured and compared. A self-assessment questionnaire was completed by the participants.

RESULTS

Overall, the 3D-system permitted a greater improvement in working speed, superior optical visualization, and better endoscopic handling in all groups, independent of surgical experience. All students improved in speed (exercises: 1-3) and made significantly fewer mistakes (exercise 2) on 3D compared with 2D. Residents made progress in time (exercises: 1-4) and task performance (exercise 3). Specialists improved significantly in the more challenging tasks 3 and 4. Subjectively, 68.8% of participants preferred 3D for performing laparoscopy.

CONCLUSION

Systematic training programs on pelvitrainers can improve endoscopic skills not only in beginners but also in experienced surgeons. The 3D system offered distinct advantages over 2D imaging and was well accepted by surgeons.

Training Performance of Laparoscopic Surgery in Two- and Three-Dimensional Displays

INTRODUCTION

This research investigated differences in the effects of a state-of-art stereoscopic 3-dimensional (3D) display and a traditional 2-dimensional (2D) display in simulated laparoscopic surgery over a longer duration than in previous publications and studied the learning effects of the 2 display systems on novices.

METHODS

A randomized experiment with 2 factors, image dimensions and image sequence, was conducted to investigate differences in the mean movement time, the mean error frequency, NASA-TLX cognitive workload, and visual fatigue in pegboard and circle-tracing tasks.

RESULTS

The stereoscopic 3D display had advantages in mean movement time ( P < .001 and P = .002) and mean error frequency ( P = .010 and P = .008) in both the tasks. There were no significant differences in the objective visual fatigue ( P = .729 and P = .422) and in the NASA-TLX ( P = .605 and P = .937) cognitive workload between the 3D and the 2D displays on both the tasks. For the learning effect, participants who used the stereoscopic 3D display first had shorter mean movement time in the 2D display environment on both the pegboard ( P = .011) and the circle-tracing ( P = .017) tasks.

CONCLUSIONS

The results of this research suggest that a stereoscopic system would not result in higher objective visual fatigue and cognitive workload than a 2D system, and it might reduce the performance time and increase the precision of surgical operations. In addition, learning efficiency of the stereoscopic system on the novices in this study demonstrated its value for training and education in laparoscopic surgery.

The learning curves of robotic and three-dimensional laparoscopic surgery in cervical cancer

BACKGROUND: The 3D laparoscopy systems and robotic systems have been introduced into clinical practice for a few years. But the comparison of robotic and 3D laparoscopic gynecologic surgery is still needed.

OBJECTIVE: To retrospectively compare the learning curves of robotic and 3D laparoscopic hysterectomy and pelvic lymphadenectomy in cervical cancer.

STUDY DESIGN: The operational duration, blood loss, peritoneal drainage of first 24 hours after operation, total hospitalization days, hospitalization days after operation, lymph nodes collected, learning curves and cost of robotic and 3D laparoscopic hysterectomy and pelvic lymphadenectomy in cervical cancer performed by one experienced surgeon were studied.

RESULTS: There was one surgeon who performed 37 cases of robotic and 24 cases of 3D laparoscopic hysterectomy and pelvic lymphadenectomy, and the turning point of learning curves was case 13^th and case 10^th. The differences of duration of operation, blood loss, peritoneal drainage of first 24 hours after operation, total hospitalization days, hospitalization days after operation, lymph nodes collected and perioperative complications were not statistically significant. But the cost of each robotic operation was higher than 3D operation.

CONCLUSIONS: The turning point of the learning curve of 3D laparoscopic hysterectomy and pelvic lymphadenectomy is earlier than that of robotic sugery in patients with cervical cancer, and there is no obvious benefit from robotic surgery than 3D surgery in the terms of short-term medical index and hospitalization cost.

Impact of Training on Three-Dimensional versus Two-Dimensional Laparoscopic Systems on Acquisition of Laparoscopic Skills in Novices: A Prospective Comparative Pilot Study

In this prospective educational study, 10 medical students (novices) were randomized to practice two basic laparoscopic tasks from the MISTELS program, namely, Pegboard Transfer (PT) and Intracorporeal Knot Tying (IKT) tasks, using either a 2D or a 3D laparoscopic platform. There was no significant difference between both groups in the baseline assessments (PT task: 130.8 ± 18.7 versus 151.5 ± 33.4; p = 0.35) (IKT task: 123.9 ± 41.0 versus 122.9 ± 44.9; p = 0.986). Following two training sessions, there was a significant increase in the scores of PT task for the 2D (130.8 ± 18.7 versus 222.6 ± 7.0; p = 0.0004) and the 3D groups (151.5 ± 33.4 versus 211.7 ± 16.2; p = 0.0001). Similarly, there was a significant increase in the scores of IKT task for the 2D (123.9 ± 41.0 versus 373.3 ± 47.2; p = 0.003) and the 3D groups (122.9 ± 44.9 versus 338.8 ± 28.6; p = 0.0005). However, there was no significant difference in the final assessment scores between 2D and 3D groups for both tasks (p > 0.05). Therefore, 3D laparoscopic systems do not provide an advantage over 2D systems for training novices in basic laparoscopic skills.

Laser visual guidance versus two-dimensional vision in laparoscopy: a randomized trial

Background

During laparoscopy, the surgeon’s loss of depth perception and spatial orientation is problematic. Laser visual guidance (LVG) is an innovative technology that improves depth perception to enhance the visual field. In this trial, we examined the effect of LVG on surgical novices’ motor skills, quality of task performance, and cognitive workload.

Methods

We designed a randomized controlled trial following the CONSORT statement. Thirty-two surgical novices completed the Training and Assessment of Basic Laparoscopic Techniques (TABLT) test. The first attempt allowed participants to familiarize themselves with the exercises. We then randomized the participants, and they completed a test session using either LVG or conventional two-dimensional vision.

Results

We found no significant difference between using the LVG tool and conventional 2D vision; however, both the mean completion time and movements used were less in the LVG group: Mean time used in the LVG group was 1288 s (95 % CI 1188–1388) versus 1354 s (95 % CI 1190–1518) (p = 0.45); mean angular path length used in the LVG group was 24,049° (95 % CI 20,761–27,336) versus 26,014° (95 % CI 22,059–29,970) (p = 0.42); mean path length in the LVG group was 4560 cm (95 % CI 3971–5,149 cm) versus 5062 cm (95 % CI 4328–5797), (p = 0.26). Moreover, the mean TABLT performance score was higher in the LVG group compared with the 2D group, although not significant: 379 (95 % CI 352–405) versus 338 (95 % CI 288–387) (p = 0.14). No significant difference was found between the groups’ cognitive workloads.

Conclusion

We found no significant improvement of laparoscopic motor skills when using LVG, although a tendency toward improved performance was seen. LVG could have the potential to help novice surgeons acquire basic laparoscopic; however, further development of the concept and validation is needed to confirm this.