Novel quantitative and objective structured assessment of technical skill for slip knotting.

OBJECTIVE: Currently, no quantitative and objective method has been established for evaluating competencies in basic surgical techniques. The aim of this study was to develop a structured assessment tool for slip knotting and verify how well current board certification system discriminates the level of basic surgical skill. METHODS: We examined 171 cardiovascular surgical fellows using a novel assessment method for slip knotting that was developed by the committee of the Under-Forty of the Japanese Society of Cardiovascular Surgery. We compared the scores and examinees' surgical experience for validation. We analyzed the relationship between board certification and the scores. RESULTS: The scores differentiated the general surgical board-certified surgeons from those without certification. Surgical experiences such as training years and number of operated cases and scores were correlated. Among the board-certified surgeons, the group with daily off-the-job training, or simulator-based skill training had a significantly higher mean score (67.4 ± 3.0 vs 55.4 ± 3.1, p = 0.008) and lower rate of poor scorers (7.1% vs 38.5%, p = 0.004). A multivariate analysis revealed that board certification did not predict high scores. Daily off-the-job training was the only independent predictor of high scores (odds ratio: 2.41, 95% confidence interval: 0.01-1.20, p = 0.014). CONCLUSIONS: This novel quantitative and objective assessment tool for technical skill in slip knotting was found to be valid to examine the skill for slip knotting. In this study, current board certification discriminated the level of basic surgical skill. However, it could not distinguish extremely low scorers perfectly. Some board-certified surgeons showed poor technical competency, especially those without off-the-job training.

A Simulation Suture Compared With a Clinical Suture for Training on Laparoscopic Simulators: Objective Measurements Indicate Acceptable Physical Characteristics.

OBJECTIVE: Simulation sutures are a low-cost option for training purposes, but they may not perform as well as the more expensive clinical suture. Trainees at our institution have raised concerns about their quality and integrity compared with clinical suture. The objective was to determine whether significant differences in strength of the sutures and knot holding capabilities between low and high-cost sutures existed. METHODS: Two sutures were compared: 3-0 braided silk simulation suture (Sim*Vivo LLC, Willsboro, NY) and 3-0 Perma-Hand silk braided clinical suture (Ethicon, Somerville, NJ). The diameter of the suture was assessed with light microscopy. Tensile strength of the suture and knotted suture were assessed. Both sutures were tested dry and wet. RESULTS: Tensile strength of the sutures, knotted or unknotted, were not significantly different. Knot type did not change this comparison. Soaking in saline did not change the tensile strength but did introduce a substantial difference in knot failure mode between sutures. The mean diameter of the Ethicon suture was larger than that of the Sim*Vivo suture, which could influence suture behavior. CONCLUSIONS: The applied mechanical tests identified that clinical and simulation sutures differ some in their inherent mechanical characteristics related to suture handling. However, these differences did not translate to a key measure of performance of a sutured junction, namely, the strength of the knotted suture. Based on the results of the study, any subjective impressions of simulation suture strength and knot holding should not negatively impact its use for medical education.

Inter-rater Reliability for Metrics Scored in a Binary Fashion-Performance Assessment for an Arthroscopic Bankart Repair.

PURPOSE: To determine the inter-rater reliability (IRR) of a procedure-specific checklist scored in a binary fashion for the evaluation of surgical skill and whether it meets a minimum level of agreement (≥0.8 between 2 raters) required for high-stakes assessment. METHODS: In a prospective randomized and blinded fashion, and after detailed assessment training, 10 Arthroscopy Association of North America Master/Associate Master faculty arthroscopic surgeons (in 5 pairs) with an average of 21 years of surgical experience assessed the video-recorded 3-anchor arthroscopic Bankart repair performance of 44 postgraduate year 4 or 5 residents from 21 Accreditation Council for Graduate Medical Education orthopaedic residency training programs from across the United States. RESULTS: No paired scores of resident surgeon performance evaluated by the 5 teams of faculty assessors dropped below the 0.8 IRR level (mean = 0.93; range 0.84-0.99; standard deviation = 0.035). A comparison between the 5 assessor groups with 1 factor analysis of variance showed that there was no significant difference between the groups (P = .205). Pearson's product-moment correlation coefficient revealed a strong and statistically significant negative correlation, that is, -0.856 (P < .000), indicating that as intra-operative error rate scores increased, the IRR decreased. CONCLUSIONS: Arthroscopy Association of North America shoulder faculty raters from across the United States showed high levels of IRR in the assessment of an arthroscopic 3-anchor Bankart repair procedure. All paired assessments were above the 0.8 level and the mean IRR of all resident assessments was 0.93, indicating that they could be used for high-stakes decisions. CLINICAL RELEVANCE: With the move toward outcomes-based performance evaluation for graduate medical education, high-stakes assessments of surgical skill will require robust, reliable measurement tools that are able to withstand challenge. Surgical checklists employing metrics scored in a binary fashion meet the need and can show a high (>80%) IRR.

Closure of Large Percutaneous Femoral Venous Access Using a Modified "Figure-of-Eight" Suture.

Recent advances in different percutaneous treatments made insertion of large-caliber sheaths in the femoral veins more common. Venous punctures are historically managed by initial manual compression with subsequent application of a compression bandage and bed rest. We describe a modified "figure-of-eight" suture technique for minimizing the risk of accidental puncture of the vein while grabbing the subcutaneous tissue. We examined the safety and feasibility of this technique combined with early mobilization in a real-world setting. We performed a retrospective analysis on 56 consecutive patients undergoing percutaneous mitral valve repair using large femoral venous access. The patient population was heterogeneous and bleeding risk characteristics were common. Bleeding Academic Research Consortium Consensus (BARC)-classifiable bleeding complications occurred in eight patients (14%), BARC of two events or more in five patients (8.9%), and BARC of three or more event in only one patient (1.8%), which is a comparable success rate to large venous access closure with suture-mediated closure devices. No BARC Type 3b or BARC Type 5 bleeding occurred. During routine clinical follow-up, no groin-related problems were reported in all patients. Closure of large femoral venous access using a modified temporary subcutaneous figure-of-eight suture in combination of a light compression bandage and bed rest for 2 to 4 hours provides a safe and low-cost alternative to closure devices for early mobilization.

An assessment of the physical impact of complex surgical tasks on surgeon errors and discomfort: a comparison between robot-assisted, laparoscopic and open approaches.

OBJECTIVES: To evaluate, in a simulated suturing task, individual surgeons' performance using three surgical approaches: open, laparoscopic and robot-assisted. subjects and methods: Six urological surgeons made an in vitro simulated vesico-urethral anastomosis. All surgeons performed the simulated suturing task using all three surgical approaches (open, laparoscopic and robot-assisted). The time taken to perform each task was recorded. Participants were evaluated for perceived discomfort using the self-reporting Borg scale. Errors made by surgeons were quantified by studying the video recording of the tasks. Anastomosis quality was quantified using scores for knot security, symmetry of suture, position of suture and apposition of anastomosis. RESULTS: The time taken to complete the task by the laparoscopic approach was on average 221 s, compared with 55 s for the open approach and 116 s for the robot-assisted approach (anova, P < 0.005). The number of errors and the level of self-reported discomfort were highest for the laparoscopic approach (anova, P < 0.005). Limitations of the present study include the small sample size and variation in prior surgical experience of the participants. CONCLUSIONS: In an in vitro model of anastomosis surgery, robot-assisted surgery combines the accuracy of open surgery while causing lesser surgeon discomfort than laparoscopy and maintaining minimal access.

An objective assessment tool for basic surgical knot-tying skills.

OBJECTIVE: To determine if a knot-tying checklist can provide a valid score and if the checklist can be used by novice surgeons in a reliable manner. METHODS: This study was conducted at the Surgical Skills Center at the University of California, San Francisco. A knot-tying checklist was developed from a kinesthetic knot-tying curriculum. Novice (67 first-year medical students) and experienced surgeons (8 residents postgraduate year 3 and higher and 2 attending physicians) were videotaped performing 4 knot-tying tasks, and the videotapes were rated with a global score and a checklist by interns (n = 3) and experienced (n = 3) surgeons. RESULTS: Both interns and experienced surgeons can use the knot-tying checklist with acceptable reliabilities (>0.8 with 3 raters). The checklist is able to differentiate between novice and experienced surgeons, when used by both interns and experienced raters. The expert knot-tying score correlated with the global score overall (r = 0.88) and for each task (r was 0.82 for task 1, 0.85 for task 2, 0.80 for task 3, and 0.81 for task 4). CONCLUSIONS: The knot-tying checklist provides a valid score for basic surgical knot-tying and can be used by novice and experienced raters. Its use supports peer assessment of performance in a surgical skills laboratory setting.

Quantitative pediatric surgical skill assessment using a rapid-prototyped chest model.

INTRODUCTION: Though minimally invasive pediatric surgery has become more widespread, pediatric-specific surgical skills have not been quantitatively assessed. MATERIAL AND METHODS: As a first step toward the quantification of pediatric-specific surgical skills, a pediatric chest model comprising a three-dimensional rapid-prototyped pediatric ribcage with accurate anatomical dimensions, a suturing skin model with force-sensing capability, and forceps with motion-tracking sensors were developed. A skill assessment experiment was conducted by recruiting 16 inexperienced pediatric surgeons and 14 experienced pediatric surgeons to perform an endoscopic intracorporeal suturing and knot-tying task in both the pediatric chest model setup and the conventional box trainer setup. RESULTS: The instrument motion measurement was successful in only 20 surgeons due to sensor failure. The task completion time, total path length of instruments, and applied force were compared between the inexperienced and experienced surgeons as well as between the box trainer and chest model setups. The experienced surgeons demonstrated better performance in all parameters for both setups, and the pediatric chest model was more challenging due to the pediatric features replicated by the model. CONCLUSION: The pediatric chest model was valid for pediatric skill assessment, and further analysis of the collected data will be conducted to further investigate pediatric-specific skills.

Video-based skill assessment of endoscopic suturing in a pediatric chest model and a box trainer.

PURPOSE: Pediatric endoscopic surgery requires special surgical skills because of the small working space and tissue fragility. This article presents a video-based skill assessment method for endoscopic suturing using a pediatric chest model. MATERIALS AND METHODS: A commercial suture pad was placed in a rapid-prototyped pediatric chest model of a 1-year-old patient to simulate the thoracoscopic repair of esophageal atresia type C. Twenty-eight pediatric surgeons (9 experts, 9 intermediates, and 10 trainees) performed an endoscopic intracorporeal suturing and knot-tying task both in the pediatric chest model and in a box trainer. The tasks were video-recorded and rated by two blinded observers using the 29-point checklist method and a suturing errors score sheet method. The task completion time and the number of needle manipulations were measured. RESULTS: The expert group showed better performance than the intermediate and trainee groups in the pediatric chest model, and the differences were larger than those in the box trainer. Significant differences between the expert and the trainee groups were observed in the items related to safety such as the skills for keeping the needle in view at all times. Significant differences between the expert and intermediate groups were observed in the items related to task quality and efficiency such as the smoothness of knot tying and the number of needle manipulations. CONCLUSIONS: Video-based skill assessment of endoscopic suturing using the pediatric chest model and a box trainer distinguished pediatric endoscopic surgeons according to their clinical experience, and pediatric-specific skills were identified.

PErineal Assessment and Repair Longitudinal Study (PEARLS): protocol for a matched pair cluster trial.

BACKGROUND: The Perineal Assessment and Repair Longitudinal Study (PEARLS) is a national clinical quality improvement initiative designed to improve the assessment and management of perineal trauma. Perineal trauma affects around 85% of women who have a vaginal birth in the UK each year and millions more world-wide. Continuous suturing techniques compared with traditional interrupted methods are more effective in reducing pain and postnatal morbidity, however they are not widely used by clinicians despite recommendations of evidence based national clinical guidelines. Perineal suturing skills and postnatal management of trauma remain highly variable within and between maternity units in the UK as well as worldwide. Implementation of a standardised training package to support effective perineal management practices could reduce perineal pain and other related postnatal morbidity for a substantial number of women. METHODS/DESIGN: PEARLS is a matched pair cluster trial, which is being conducted in maternity units across the UK. Units within a matched pair will be randomised to implement the study intervention either early or late in the study period. The intervention will include the cascading of a multi-professional training package to enhance midwifery and obstetric skills in the assessment, repair and postnatal management of perineal trauma. Women who have had an episiotomy or second degree perineal tear will be eligible for recruitment. Prior to developing the intervention and deciding on study outcomes, a Delphi survey and a consensus conference were held to identify what women, who previously suffered perineal trauma during childbirth, considered to be important outcomes for them. Findings from this preliminary work (which will be reported elsewhere) and other outcomes including women's experiences of perineal pain and pain on activity, breastfeeding uptake and duration and psychological well-being as assessed using the Edinburgh Postnatal Depression Scale (EPDS) will be assessed at 10 days and three months post-birth. DISCUSSION: Implementation of evidence-based perineal assessment and management practices, could lead to significantly improved physical and psychological health outcomes for women in the UK and world-wide. TRIAL REGISTRATION: PEARLS is registered with the Current Controlled Trials Registry (no: ISRCTN28960026). NIHR UKCRN portfolio no: 4785.

Video self-assessment augments development of videoscopic suturing skill.

BACKGROUND: Development of surgical skills on inanimate models has been popularized by efforts to improve patient safety and efficiency of resident training. We evaluated whether surgical residents' acquisition of videoscopic suturing skill is accelerated by reviewing video of their own previous practice session. STUDY DESIGN: Fourteen residents from two general surgery training programs received didactic instruction on laparoscopy. Attempts at suturing and knotting were then timed and recorded for each subject, and half of them were provided a video of their attempts to review. After 7 to 10 days, repeat attempts were timed and recorded. Knots were mechanically tested, and videos were reviewed in blinded fashion. RESULTS: Baseline characteristics were similar between the two groups. Both groups demonstrated improvement of videoscopic suturing efficiency and quality. On a 27-point scale, suturing and knot quality scores improved by an average of 11.6 (SD 3.9) in the video review group and 2.3 (SD 6.0) in the control group (p = 0.007). Times to complete the tasks were reduced by 30.3% (SD 11%) in the video review group and 3.1% (SD 32%) in the control group (p = 0.075). Eighty-six percent of video review subjects found the videos useful, and 86% of control subjects believed that videos would have been useful. CONCLUSIONS: Development of videoscopic suturing skill is augmented by independent review of earlier attempts. Knot quality and technique are improved, with a trend toward increased speed. This minimal-cost method of enhancing skill training for junior residents parallels the effectiveness of video review in fields such as aviation and athletics.

Meaningful assessment method for laparoscopic suturing training in augmented reality.

BACKGROUND: To be an effective training tool, a laparoscopic simulator has to provide metrics that are meaningful and informative to the trainee. Time, path length and smoothness are often used parameters, but are not very informative on the quality of the performance. This study aims to validate a newly developed assessment method for laparoscopic suturing on the ProMIS augmented reality simulator, and compares it with scores of objective observers. METHODS: Twenty-four participants practised their suturing skills on the augmented reality suturing module: experienced participants (n = 10), >50 clinical laparoscopic suturing experience; and novice participants (n = 14), without laparoscopic experience. The performances were recorded and assessed by two unrelated observers and compared with the assessment scores. The assessment score was a calculation of time spent in the correct area and quality (strength) of the knot. To test the accuracy of the individual assessment parameters, we compared these with each other. RESULTS: The experienced participants had significantly higher performance scores than the novice participants in the beginner-level mode (mean 95.73 vs. 60.89, standard deviation 2.63 vs. 17.09, p < 0.001, independent t-test). The performance scores of the assessment method (n = 43) correlated significantly with the scorings of the objective observers (Spearman's rho 0.672; p < 0.001). The parameter time spent in correct area had a calculated significant correlation with the strength of the knot (n = 229, Spearman's rho 0.257, p < 0.001), but this was clinically irrelevant. CONCLUSION: This assessment method is a valid tool for objectively assessing laparoscopic suturing skills. Although assessment parameters can correlate, to provide informative feedback it is important to combine meaningful measurements in the assessment of suturing skills.

Intraoperative handling and wound healing of arthroscopic portal wounds: a clinical study comparing nylon suture with wound closure strips.

This prospective, single-centre study compared wound closure methods in patients undergoing arthroscopy. Closure of arthroscopic portal wounds with sterile adhesive strips is effective and convenient for wound management. The method was associated with a reduced potential for infection, faster renewal of tensile strength, greater cost effectiveness, and better cosmetic effects comparing with suture closure. This method of wound closure may also reduce the incidence of needle stick injury in the theatre environment. Thereby the incidence of percutaneous exposure following a surgical procedure may not facilitate transmission of blood borne pathogens such as human immunodeficiency virus (HIV), hepatitis C virus and hepatitis B virus. As a result it may reduce litigation in today's changing healthcare climate.

Employment of the mouse median nerve model for the experimental assessment of peripheral nerve regeneration.

The experimental investigation of nerve regeneration after microsurgical repair is usually carried out in rats, rather than mice, because of the larger sized peripheral nerves. Today however, the availability of genetically modified mice makes the use of this laboratory animal very intriguing for investigating nerve regeneration at a molecular level. In this study we aimed to provide a standardization of the experimental model based on microsurgical direct repair, by 12/0 suture, of the left median nerve in adult male mice. Postoperative recovery was regularly assessed by the grasping test. At day-75 postoperative, regenerated median nerve fibers were analyzed by design-based quantitative morphology and electron microscopy. Yet, sections were immuno-labelled using two axonal antibodies commonly employed for rat nerve fibers. Results indicated that functional recovery begun at day-15 and progressively increased reaching values not significantly different from normal by day-50. Quantitative morphology showed that, at day-75, the number of regenerated nerve fibers was not significantly different in comparison to controls. In contrast, differences were detected in fiber density, mean axon and fiber diameter and myelin thickness which were all significantly lower than controls. Immunohistochemistry showed that axonal markers commonly used for rat nerves studies are effective also for mouse nerves. Similar to the rat, the mouse median nerve model is superior to sciatic nerve model for the minimal impact on animal well-being and the effectiveness of the grasping test for motor function evaluation. The main limitation is the small nerve size which requires advanced microsurgical skills for performing 12/0 epineurial suturing.

Can a double-row anchorage technique improve tendon healing in arthroscopic rotator cuff repair?: A prospective, nonrandomized, comparative study of double-row and single-row anchorage techniques with computed tomographic arthrography tendon healing assessment.

BACKGROUND: Increasing the rate of watertight tendon healing has been suggested as an important criterion for optimizing clinical results in rotator cuff arthroscopic repair. HYPOTHESIS: A double-row anchorage technique for rotator cuff repair will produce better clinical results and a better rate of tendon healing than a single-row technique. STUDY DESIGN: Cohort study; Level of evidence, 2. METHODS: We compared 31 patients undergoing surgery with a double-row anchorage technique using Panalok anchors and Cuff Tack anchors and 35 patients with rotator cuff tear undergoing surgery with a single-row anchorage arthroscopic technique using Panalok anchors. We compared pre- and postoperative Constant score and tendon healing, as evaluated by computed tomographic arthrography 6 months after surgery, in these 2 groups. RESULTS: The Constant score increased significantly in both groups, with no difference between the 2 groups (P = .4). Rotator cuff healing was judged anatomic in 19 patients with double-row anchorage and in 14 patients with single-row anchorage; this difference between the groups was significant (P = .03). CONCLUSION: In this first study comparing double- and single-row anchorage techniques, we found no significant difference in clinical results, but tendon healing rates were better with the double-row anchorage. Improvements in the double-row technique might lead to better clinical and tendon healing results.

The subcutaneous loop: a single suture technique for skin closure after superficial and subcutaneous surgery.

BACKGROUND: Removal of subcutaneous skin masses and certain deep skin injuries results in defects, which demand immediate closure. Although primary closure of these defects in 2 layers is an acceptable solution, this technique has a number of drawbacks, such as extended time consumption upon performance, demand for additional suture material and occasional tissue response or foreign body reaction to retained absorbable stitches leading to infection and its sequelae. OBJECTIVE: We describe an approach intended to furnish a satisfactory solution to the needs of tissue closure in such cases. The significant innovation of this technique is the closure of both deep and superficial layers of skin in one single suture. MATERIALS AND METHODS: Our suture combines the advantages of the classic mattress suture together with those of the buried subcutaneous suture. We performed the vertical mattress suture with 3/0 polypropylene or monofilament suture and added a subcutaneous loop to achieve sufficient approximation of deep tissue surfaces. This suture technique was applied in our first 50 cases. The defects were closed without adverse sequelae. No tissue infections were observed. Wound dehiscence occurred in one case after premature suture removal. The stitches were slightly more difficult to remove than regular sutures. Review of the resulting scars exhibited acceptable results similar to those of parallel closure techniques. CONCLUSIONS: This easily performed technique yields the benefits of reducing suture cost, annulling foreign body reaction, and resulting in both a functional and aesthetically pleasing outcome. The subcutaneous loop technique has become our standard closure of choice for wounds demanding simultaneous cutaneous and subcutaneous repair.

Bimodal assessment of laparoscopic suturing skills: construct and concurrent validity.

BACKGROUND: The assessment of technical skills should provide objective feedback and judge suitability of progress during training. The aim of this study was to validate two objective assessment techniques for laparoscopic suturing and demonstrate a correlation between them. METHODS: Six experts, seven surgeons skilled in laparoscopic suturing, and 13 with no laparoscopic suturing skills were asked to place two or three intracorporeal sutures on a synthetic suture pad. The latter group was given video-based instructions prior to the execution of the sutures. Ergonomic conditions were standardized for all subjects. The procedures were recorded on videotape and two blinded observers rated the first suture of each subject on a 29-point checklist. A motion analysis system, Imperial College Surgical Assessment Device, was used to assess psychomotor skills. RESULTS: There was a significant difference in the time taken (p = 0.000) and total path length (p = 0.000) per suture across the groups. There were also a significant difference in the total checklist score (p = 0.000) and its individual categories. The was a strong correlation between the total path length and the total checklist score (coefficient, 0.78; p < 0.001). CONCLUSIONS: A combination of the motion analysis system and the checklist would make the process of formative feedback during the learning of intracorporeal suturing objective and comprehensive.

Objective assessment of technical skills of surgical trainees in Hong Kong.

BACKGROUND: The need for assessment of technical skills is well recognized and objective methods of assessment are currently under investigation in the UK. The applicability of these assessment tools to trainees with a different training background in another country was examined. METHODS: Six bench-top models for basic surgical trainees (BSTs) and eight for higher surgical trainees (HSTs) (five in common) were assessed for construct validity in 70 subjects. Objective assessment methods included motion analysis using the Imperial College Surgical Assessment Device, Objective Structured Assessment of Technical Skills and Minimally Invasive Surgical Trainer in Virtual Reality. RESULTS: All models shared between BSTs and HSTs exhibited construct validity (range P = 0.050 to P < 0.001). Of the three modules for HSTs alone, only one gave significant results (small bowel anastomosis; P = 0.005). Reasons for this were sought. CONCLUSION: The methods of objective technical skills assessment of trainees in the UK are applicable to those in Hong Kong. Their use should be promoted and the tracking of skills development encouraged.

The assessment of surgical skills and a simple knot-tying exercise.

Basic surgical skills courses are mandatory for all surgical trainees taking the MRCS examination. An important aspect of these courses is the level of practical skill achieved by junior surgeons attending them. We present a simple knot-tying exercise, which may be used to assess the baseline skill level of trainees at the outset of the course and against which their progress can be judged after tuition and practice.

Objective assessment of endoscopic knot quality.

BACKGROUND: Studies of the surgeon's skill and the ergonomics of task performance in endoscopic surgery can be based on knot-tying tasks. The aim of this study was to establish an objective method for assessing the quality of surgical knots for use in such studies. METHODS: In all, 2,700 surgeon's endoscopic knots were studied. Each knot was distracted using a tensiometer, and a computerized system analyzed force-extension curves. The breaking force was taken as an index of knot strength while the force integrated over the slope of the curve reflected knot tightening. A knot quality score (KQS) was obtained from the product of the knot-breaking force and the integrated force expressed as a percentage of the product for the untied ligature. RESULTS: The mean breaking force (24 Newton +/- 2.5) and integrated force (7.4 Newton +/- 2.8) for broken knots were 71% and 35%, respectively, of those for untied ligature. The integrated force yielded a narrower range of variability for untied ligature (SD 3.5% of mean) than for knots (SD 37% of mean). The KQS was higher for broken (25.3%+/-10.3%) than slipped knots (7.1%+/-5.1%). CONCLUSION: The KQS provides a reliable assessment of knot security and reflects the strength and degree of tightening of the knot.

A randomized comparison of continuous versus interrupted mass closure of midline incisions in patients with gynecologic cancer.

OBJECTIVE: To address the incidence of deep wound dehiscence and incisional hernia formation with two types of mass closure after vertical midline laparotomy performed in patients with gynecologic cancer. METHODS: Continuous and interrupted mass closures were compared randomly in 632 patients. Both methods were performed with absorbable material. Of the 614 subjects who could be evaluated, 308 underwent a continuous, non-locking closure with looped polyglyconate suture, and 306 were closed with interrupted polyglycolic acid according to the Smead-Jones technique. RESULTS: Three (1%) subjects with the continuous closure and five (1.6%) with the interrupted closure had an abdominal wound infection (P = .50). One patient whose incision was closed with continuous suturing had a deep wound dehiscence (without evisceration). The follow-up period was 6 months to 3 years. No patient had evidence of chronic sinus drainage. Thirty-two (10.4%) of the patients who had the continuous closure and 45 (14.7%) of those who were closed with the interrupted method had evidence of incisional hernia (P = .14). No hernia developed in any patient with a wound infection. Four (1.3%) hernias after the continuous closure and eight (2.6%) after the interrupted closure required surgical repair because of patient discomfort (P = .38). CONCLUSION: The interrupted closure was not superior to the continuous closure for short- and long-term wound security. The continuous method was preferable because it was more cost-efficient and faster.