Robot-assisted single-site compared with laparoscopic single-incision cholecystectomy for benign gallbladder disease: protocol for a randomized controlled trial

Differences in Physicians' Ratings of Work Stressors and Resources Associated With Digital Transformation: Cross-Sectional Study

BACKGROUND

The emergence of the COVID-19 pandemic rapidly accelerated the need and implementation of digital innovations, especially in medicine.

OBJECTIVE

To gain a better understanding of the stress associated with digital transformation in physicians, this study aims to identify working conditions that are stress relevant for physicians and differ in dependence on digital transformation. In addition, we examined the potential role of individual characteristics (ie, age, gender, and actual implementation of a digital innovation within the last 3 years) in digitalization-associated differences in these working conditions.

METHODS

Cross-sectional web-based questionnaire data of 268 physicians (mean age 40.9, SD 12.3 y; n=150, 56% women) in Germany were analyzed. Physicians rated their chronic stress level and 11 relevant working conditions (ie, work stressors such as time pressure and work resources such as influence on sequence) both before and after either a fictional or real implementation of a relevant digital transformation at their workplace. In addition, a subsample of individuals (60; n=33, 55% women) submitted self-collected hair samples for cortisol analysis.

RESULTS

The stress relevance of the selected working conditions was confirmed by significant correlations with self-rated chronic stress and hair cortisol levels (hair F) within the sample, all of them in the expected direction (P values between .01 and <.001). Multilevel modeling revealed significant differences associated with digital transformation in the rating of 8 (73%) out of 11 working conditions. More precisely, digital transformation was associated with potentially stress-enhancing effects in 6 working conditions (ie, influence on procedures and complexity of tasks) and stress-reducing effects in 2 other working conditions (ie, perceived workload and time pressure). Younger individuals, women, and individuals whose workplaces have implemented digital innovations tended to perceive digitalization-related differences in working conditions as rather stress-reducing.

CONCLUSIONS

Our study lays the foundation for future hypothesis-based longitudinal research by identifying those working conditions that are stress relevant for physicians and prone to differ as a function of digital transformation and individual characteristics.

Feasibility and Efficacy of Single-Port Robotic Cholecystectomy Using the da Vinci SP® Platform

Background

Single-incision laparoscopic cholecystectomy, first introduced in 1995, features acceptable cosmetic outcomes and postoperative pain control. The outcomes of single-port cholecystectomy by laparoscopy and robots were recently examined in many studies owing to surgeon and patient preference for minimally invasive surgery. A next-level da Vinci robotic platform was recently released. This study aimed to evaluate the feasibility and efficacy of robotic cholecystectomy (RC) using the da Vinci SP® system.

Methods

In this retrospective observational single-center study, we analyzed the medical records of 304 patients who underwent RC between March 1, 2017 and May 31, 2021.

Results

Of the 304 patients, the da Vinci Xi® (Xi) was used in 159 and the da Vinci SP® (SP) was used in 145. The mean operation time was 45.7 mins in the SP group versus 49.8 mins in the Xi group. The mean docking time of the SP group was shorter than that of the Xi group (5.7 min vs 8.8 min; p = 0.024). The mean immediate postoperative numerical rating scale (NRS) score was 4.0 in the SP group and 4.3 in the Xi group, showing a significant difference (p = 0.003). A separate analysis of only patients with acute cholecystitis treated with the da Vinci SP® showed that the immediate postoperative NRS score in the acute group was higher than that in the nonacute group.

Conclusions

This study demonstrated acceptable results of single-site cholecystectomy using da Vinci SP®. Thus, pure single-port RC using the da Vinci SP® for various benign gallbladder diseases may be an excellent treatment option.

Generation and validation of a formula to calculate hemoglobin loss on a cohort of healthy adults subjected to controlled blood loss

Background

The ability to approximate intra-operative hemoglobin loss with reasonable precision and linearity is prerequisite for determination of a relevant surgical outcome parameter: This information enables comparison of surgical procedures between different techniques, surgeons or hospitals, and supports anticipation of transfusion needs. Different formulas have been proposed, but none of them were validated for accuracy, precision and linearity against a cohort with precisely measured hemoglobin loss and, possibly for that reason, neither has established itself as gold standard. We sought to identify the minimal dataset needed to generate reasonably precise and accurate hemoglobin loss prediction tools and to derive and validate an estimation formula.

Methods

Routinely available clinical and laboratory data from a cohort of 401 healthy individuals with controlled hemoglobin loss between 29 and 233 g were extracted from medical charts. Supervised learning algorithms were applied to identify a minimal data set and to generate and validate a formula for calculation of hemoglobin loss.

Results

Of the classical supervised learning algorithms applied, the linear and Ridge regression models performed at least as well as the more complex models. Most straightforward to analyze and check for robustness, we proceeded with linear regression. Weight, height, sex and hemoglobin concentration before and on the morning after the intervention were sufficient to generate a formula for estimation of hemoglobin loss. The resulting model yields an outstanding R² of 53.2% with similar precision throughout the entire range of volumes or donor sizes, thereby meaningfully outperforming previously proposed medical models.

Conclusions

The resulting formula will allow objective benchmarking of surgical blood loss, enabling informed decision making as to the need for pre-operative type-and-cross only vs. reservation of packed red cell units, depending on a patient’s anemia tolerance, and thus contributing to resource management.

Supplementary Information

The online version contains supplementary material available at 10.1186/s12967-021-02783-9.

Application of robotic single-site surgery with optional additional port for endometriosis: a single institution's experience

To evaluate the safety and feasibility of treating stage I-IV endometriosis patients with robotic single-site surgery (RSSS). A retrospective chart review was conducted on 334 patients with endometriosis treated by a single surgeon at a university hospital from January 2015 to November 2019. Surgeries were performed in a single institution between 2015 and 2019. All patients presented with pelvic pain and underwent surgical resection of the lesion. American Society of Reproductive Medicine (ASRM) standards were used to classify endometriosis. The primary goal of this study is to investigate the feasibility and safety of RSSS for surgical resection of stage I-IV endometriosis patients. We will compare patient characteristics and surgical parameters, such as blood loss, operating time, and postoperative complications, across different endometriosis stages to evaluate the effectiveness of this novel technique. RSSS was used for all cases, with no conversions to laparotomy or traditional laparoscopy. One to two additional ports were placed in 41 patients with deeply infiltrating endometriosis (DIE) involving the colorectal and urinary tract and/or extensive pelvic adhesions. Across patient groups, there were no significant differences in age, BMI, fertility history, abdominal surgery history, and hysterectomy ratio (P > 0.05). The median operation time was 140.25 min (range: 85.50-260.00 min, P < 0.05) and median blood loss was 31.25 mL (range: 15-100 mL, P < 0.05). Histopathology supported the diagnosis in 259/334 patients. The undiagnosed patients were associated with lower ASRM scores. For 83.3% of patients (295/334), the length of hospital stay was < 24 h. The postoperative complication rate was 6.0% (20/334), although only two cases were severe. Our results indicate that RSSS is an alternative, safe, and acceptable platform for the surgical treatment of all stages of endometriosis.

Robotic-assisted cholecystectomy is superior to laparoscopic cholecystectomy in the initial training for surgical novices in an ex vivo porcine model: a randomized crossover study

Background

Robotic-assisted surgery (RAS) potentially reduces workload and shortens the surgical learning curve compared to conventional laparoscopy (CL). The present study aimed to compare robotic-assisted cholecystectomy (RAC) to laparoscopic cholecystectomy (LC) in the initial learning phase for novices.

Methods

In a randomized crossover study, medical students (n = 40) in their clinical years performed both LC and RAC on a cadaveric porcine model. After standardized instructions and basic skill training, group 1 started with RAC and then performed LC, while group 2 started with LC and then performed RAC. The primary endpoint was surgical performance measured with Objective Structured Assessment of Technical Skills (OSATS) score, secondary endpoints included operating time, complications (liver damage, gallbladder perforations, vessel damage), force applied to tissue, and subjective workload assessment.

Results

Surgical performance was better for RAC than for LC for total OSATS (RAC = 77.4 ± 7.9 vs. LC = 73.8 ± 9.4; p = 0.025, global OSATS (RAC = 27.2 ± 1.0 vs. LC = 26.5 ± 1.6; p = 0.012, and task specific OSATS score (RAC = 50.5 ± 7.5 vs. LC = 47.1 ± 8.5; p = 0.037). There were less complications with RAC than with LC (10 (25.6%) vs. 26 (65.0%), p = 0.006) but no difference in operating times (RAC = 77.0 ± 15.3 vs. LC = 75.5 ± 15.3 min; p = 0.517). Force applied to tissue was similar. Students found RAC less physical demanding and less frustrating than LC.

Conclusions

Novices performed their first cholecystectomies with better performance and less complications with RAS than with CL, while operating time showed no differences. Students perceived less subjective workload for RAS than for CL. Unlike our expectations, the lack of haptic feedback on the robotic system did not lead to higher force application during RAC than LC and did not increase tissue damage. These results show potential advantages for RAS over CL for surgical novices while performing their first RAC and LC using an ex vivo cadaveric porcine model.

Registration number

researchregistry6029

Graphic abstract

Outcomes of robotic and laparoscopic cholecystectomy for benign gallbladder disease in Veteran patients

The robotic platform for cholecystectomy has been extensively studied in comparison to its laparoscopic counterpart with acceptable outcomes. However, wide acceptance of a robotic approach to cholecystectomy has been limited by increased operative room (OR) times and substantially higher cost. This is a single-institution retrospective review of Veteran patients presenting for elective laparoscopic (LC) and robotic (RC) cholecystectomies for benign biliary disease at the Dallas VA Medical Center. The primary goal was to interrogate 30-day morbidity as well as operative room times, estimated blood loss (EBL), hospital length of stay (LOS), and conversion rates. The entire cohort included 612 patients (age = 55.1 ± 12.9 years, men = 77.9%, BMI = 31.2 ± 6.3 kg/m²) undergoing elective cholecystectomy (LC = 441 and RC = 171) for benign biliary disease (biliary colic = 78.8%, history of biliary pancreatitis = 7.8%, history of cholecystitis = 5.7%). Univariate analysis comparing LC and RC showed the two groups to be of similar age (55.4 ± 12.4 vs. 54.4 ± 14.2 years; p = 0.4), male gender (79.4% vs. 74.3%, p = 0.2), and BMI (31.1 ± 6.4 vs. 31.5 ± 6.3 kg/m²; p = 0.5). Except for dyslipidemia (LC = 48.3% vs. RC = 36.8%; p = 0.01), both groups had the same rate of co-morbid conditions. ASA level III and IV (LC = 60.1 vs. RC = 69.0%, p = 0.04) was higher in the RC group. Both groups underwent surgical intervention for similar indications (biliary colic LC = 80.5% vs. RC = 74.3; p = 0.1). Hospital LOS (1.7 ± 3.2 vs. 0.3 ± 0.9 days, p < 0.001), EBL (32.3 ± 52.3 vs. 17.0 ± 43.1; p = 0.001), and conversion to open (6.6% vs. 0.6%, p = 0.001) were all superior with the robotic platform. Thirty-day overall morbidity (9.8% vs. 12.3%, p = 0.4), skin-to-skin OR time (84.5 ± 33.5 vs. 88.0 ± 35.3 min, p = 0.2), and total OR time (129.2 ± 36.8 vs. 129.7 ± 39.7, p = 0.9) were similar between the LC and RC groups. Despite being older and having more comorbidities, Veteran patients undergoing robotic cholecystectomy experienced equivalent OR time and a moderate improvement in conversion rate, EBL, and hospital LOS compared to those undergoing conventional laparoscopy, therein demonstrating the safety and efficacy of the robotic platform for this patient population.

Minimally Invasive Single-Site Cholecystectomy in Obese Patients: Laparoscopic vs. Robotic

Purpose

Laparoscopic cholecystectomy is treatment method for management of benign gallbladder diseases. Further attempts are made to operate single-port laparoscopic cholecystectomy. However, single-port laparoscopic cholecystectomy, the procedure remains technically difficult, especially in obese patient. Recently, a robotic surgical system for minimal invasive surgery was introduced to overcome the limitations of conventional laparoscopic surgery.

Methods

From April 2009 to August 2017, we retrospectively reviewed the medical records of patients with single-site, minimally invasive (laparoscopic and robotic) cholecystectomy with high BMI (>25 kg/m²). We analyzed general characteristics and perioperative outcomes between the single-fulcrum laparoscopic cholecystectomy group and the robotic single-site cholecystectomy (RSSC) group.

Results

Operation time (57.56±11.10 vs 98.5±12.28 p<0.001) was significantly longer and postoperative pain score (3.61 vs 5.15 p=0.000) was significantly higher in the robotic single-site cholecystectomy (RSSC) group, but the actual dissection time (25.85±11.09 vs 25.79±13.35 p=0.978) was not significantly different between the two approaches. Iatrogenic gallbladder perforation, (13 vs 6 p=0.005), patients undergoing RSSC showed a significantly smaller amount than did those undergoing single-fulcrum laparoscopic cholecystectomy (SFLC).

Conclusion

It is difficult to say for certain that RSSC is clearly better than SFLC in obese patients. However, because of the technical convenience and efficiency of surgery with RSSC, RSSC can be practically worthwhile. Further study is mandatory.

Initial Experiences With Robotic Single-Site Thoracic Surgery for Mediastinal Masses

BACKGROUND

The da Vinci Single-Site platform (Intuitive Surgical, Mountain View, CA) has been applied in many fields of surgery, but use of this single-site platform in thoracic surgery has not been reported. This study reported our experiences and surgical outcomes with robotic single-site surgery in the field of thoracic surgery.

METHODS

We retrospectively reviewed 14 patients who underwent robotic single-site thoracic surgery at 2 different institutions.

RESULTS

All 14 cases were successfully completed, without conversion to conventional multiport robotic surgery. The most frequent diagnoses were thymic cyst (n = 4) and pericardial cyst (n = 3). The median largest mass size was 4.1 cm (range, 2.0 to 6.5 cm). The median operation time was 105 minutes (range, 27 to 185 minutes). After the operation, pleural effusion occurred in 1 patient (case 7) on the side on which the operation was performed but was managed with conservative treatment. The median duration of chest tube stay was 2 days (range, 1 to 3 days), and hospital stay was 4 days (range, 3 to 11 days). The median peak pain score after the operation was 3 (range, 1 to 7). Compared with thoracoscopic single-port surgery, robotic single-site thoracic surgery showed a longer operative time and higher cost.

CONCLUSIONS

This study demonstrated that robotic single-site thoracic surgery for mediastinal masses is a safe and feasible procedure. Although this study reports the initial series and the cases were relatively simple, more advanced and complex procedures could be done with the advent of new technology in the near future.

Robot-assisted versus laparoscopic single-incision cholecystectomy: results of a randomized controlled trial

BACKGROUND

Although single-port laparoscopic cholecystectomy (SILC) is safe and effective, inherent surgeons' discomfort has prevented a large-scale adaptation of this technique. Recent advances in robotic technology suggest that da Vinci Single-Site™ cholecystectomy (dVSSC) may overcome this issue by reducing the stress load of the surgeon compared to SILC. However, evidence to objectively assess differences between the two approaches is lacking.

METHODS

60 patients [36 women, 24 men (mean age 52 years)] with benign gallbladder disease were randomly assigned to dVSSC (n = 30) or SILC (n = 30) in this single-centre, single-blinded controlled trial. The primary endpoint was surgeon's stress load. Secondary endpoints included operating time, conversion rates, additional trocar placement, blood loss, length of hospital stay, procedure costs, health-related quality of life, cosmesis and complications. Data were collected preoperatively, during the hospital stay, and at 1 and 12 months' follow-up.

RESULTS

The dVSSC group showed a significant reduction of mental stress load of the surgeon compared to SILC [Subjective Mental Effort Questionnaire (SMEQ) score: median 25.0 (range 8-89) vs. 42.5 (range 13-110) points; p = 0.002] and a trend towards reduced physical stress load [Local Experienced Discomfort (LED) score: median 8 (range 2-27) vs. 12 (range 0-64) points; p = 0.088]. The length of hospital stay was longer in the SILC group [mean 3.06 (median 2; range 1-26) vs. 1.9 (median 2; range 1-4) days, p = 0.034] but overall hospital costs were higher for dVSSC [median 9734 (range 5775-16729) vs. 6900 (range 4156-99977) CHF; p = 0.001]. There were no differences in the rate of postoperative complications that required re-intervention (Dindo-Clavien grade ≥ IIIa; SILC n = 2 vs. dVSSC n = 0, p = 0.492) or other secondary endpoints.

CONCLUSIONS

Da Vinci Single-Site™ cholecystectomy provides significant benefits over Single-Port Laparoscopic Cholecystectomy in terms of surgeon's stress load, matches the standards of the laparoscopic single-incision approach with regard to patients' outcomes but increases expenses. Clinicaltrials.gov registration-No.: NCT02485392.

Robotic-assisted versus laparoscopic cholecystectomy for benign gallbladder diseases: a systematic review and meta-analysis

BACKGROUND

Robotic surgery, an emerging technology, has some potential advantages in many complicated endoscopic procedures compared with laparoscopic surgery. But robot-assisted cholecystectomy (RAC) is still a controversial issue on its comparative merit compared with conventional laparoscopic cholecystectomy (LC). The aim of this study was to evaluate the safety and efficacy of RAC compared with LC for benign gallbladder disease.

METHODS

A systematic literature search was conducted using the PubMed, EMBASE, and Cochrane Library databases (from their inception to December 2017) to obtain comparative studies assessing the safety and efficacy between RAC and LC. The quality of the literature was assessed, and the data analyzed using R software, random effects models were applied.

RESULTS

Twenty-six studies, including 5 RCTs and 21 NRCSs (3 prospective plus 18 retrospective), were included. A total of 4004 patients were included, of which 1833 patients (46%) underwent RAC and 2171 patients (54%) underwent LC. No significant differences were found in intraoperative complications, postoperative complications, readmission rate, hospital stay, estimated blood loss, and conversion rate between RAC and LC groups. However, RAC was related to longer operative time compared with LC (MD = 12.04 min, 95% CI 7.26-16.82) in RCT group, which was consistent with NRCS group; RAC also had a higher rate of incisional hernia in NRCS group (RR = 3.06, 95% CI 1.42-6.57), and one RCT reported that RAC was similar to LC (RR = 7.00, 95% CI 0.38-129.84).

CONCLUSIONS

The RAC was not found to be more effective or safer than LC for benign gallbladder diseases, which indicated that RAC is a developing procedure instead of replacing LC at once. Given the higher costs, the current evidence is in favor of LC in cholecystectomy.

Advantages of the glove port docking technique in robotic single-site cholecystectomy: comparison with the conventional silicone port

Although the da Vinci Single-Site^® silicone port allows exact alignment and effective triangulation of instruments, it also has drawbacks. We introduce an alternative docking technique using the Glove port^®. From April 2014 to December 2016, respective 50 patients of the conventional silicone port and the glove port group were compared. The mean docking time was 16.6 ± 6.6 min in the silicone port group and 10.6 ± 3.6 min in the glove port group. Re-docking during the operation was needed in three patients in the silicone port group and readjustment of cannulae without re-docking could be simply performed in five patients in the glove port group. Skin injury was observed in 17 patients in the silicone port group and 0 patients in the glove port group without significant complications. Some limitations of the conventional silicone port were improved by the glove port.