Team consistency and occurrences of prolonged operative time, prolonged hospital stay, and hospital readmission: a retrospective analysis.

BACKGROUND: Human factors research has suggested benefits of consistent teams yet no surgical team consistency measures have been established for teamwork improvement initiatives. METHODS: Retrospective analysis was conducted of teams performing consecutive elective procedures of unilateral primary total knee and hip replacement between June 2008 and May 2010 at a large tertiary medical center. Surgeons who performed fewer than 50 cases of the procedures during the study period were excluded. A team was defined as consistent when its nurse and surgical technologist members were both among the three most frequent working with the surgeon during the study period. Odds ratios for prolonged operative time (in the longest quartile), prolonged hospital stay (longer than median), and 30-day all-cause readmissions were adjusted for patient characteristics (sex, age, comorbidity, American Society of Anesthesiology status), surgery characteristics (procedures, time of day), and surgeons. RESULTS: Inconsistent teams performed 61% of the 1,923 cases with eight surgeons, each of which worked with a median of 43.5 (range, 28-58) nurses and 29 (range, 13-47) technologists. Inconsistent teams were associated with higher likelihood of prolonged operative time [odds ratio 1.52, 95% confidence interval (CI) 1.20-1.91], higher likelihood of prolonged hospital stay (odds ratio 1.51, 95% CI 1.23-1.86), and more readmissions (adjusted odds ratio 1.42, 95% CI 1.07-1.89). CONCLUSIONS: Team consistency was an independent predictor of prolonged operative time, prolonged hospital stay, and 30-day hospital readmission in elective, primary, unilateral total knee, and hip replacement procedures, after adjusting for patient and surgery characteristics and surgeons.

Surgical simulation in orthopaedic skills training.

Mastering rapidly evolving orthopaedic surgical techniques requires a lengthy period of training. Current work-hour restrictions and cost pressures force trainees to face the challenge of acquiring more complex surgical skills in a shorter amount of time. As a result, alternative methods to improve the surgical skills of orthopaedic trainees outside the operating room have been developed. These methods include hands-on training in a laboratory setting using synthetic bones or cadaver models as well as software tools and computerized simulators that enable trainees to plan and simulate orthopaedic operations in a three-dimensional virtual environment. Laboratory-based training offers potential benefits in the development of basic surgical skills, such as using surgical tools and implants appropriately, achieving competency in procedures that have a steep learning curve, and assessing already acquired skills while minimizing concerns for patient safety, operating room time, and financial constraints. Current evidence supporting the educational advantages of surgical simulation in orthopaedic skills training is limited. Despite this, positive effects on the overall education of orthopaedic residents, and on maintaining the proficiency of practicing orthopaedic surgeons, are anticipated.

Virtual reality in orthopaedics: is it a reality?

BACKGROUND: Virtual reality (VR) simulation has been a requirement for airline and military pilots for decades and is only now being integrated into surgical training programs. Thus far, orthopaedic training programs have been slow to adopt VR training. QUESTIONS/PURPOSES: We therefore asked (1) how VR has worked for other surgical specialties; (2) what VR solutions are available for orthopaedics; and (3) should VR simulation become part of the orthopaedic curriculum? METHODS: An informal literature review was performed, searching for orthopaedically-oriented VR surgical simulators and comparing this to the number of programs available for general surgery teaching programs. An in-depth review of a VR simulator for knee arthroscopy is also presented. WHERE ARE WE NOW?: The number of papers specific to orthopaedics and VR is limited. VR is used effectively in other specialties, especially general surgery. VR simulators are readily available for shoulder and knee arthroscopy but not as well incorporated into training curricula. WHERE DO WE NEED TO GO?: VR technology is available today for training programs. Integration of VR into the orthopaedic curriculum will save time in the OR, reduce operative errors, and improve the resident's overall educational experience. The public will expect their surgeons to train on these simulators. HOW DO WE GET THERE?: Orthopaedic training programs should take advantage of the commercially available VR simulators for orthopaedic procedures and incorporate them into their training curricula. This effort could be led by the American Academy of Orthopaedic Surgeons (AAOS) and the American Board of Orthopaedic Surgery (ABOS), two of the primary sponsors of a major study in the effectiveness of VR simulators for knee arthroscopy.

The electronic medical office: optimizing solutions.

Optimizing the care for patients in the orthopaedic clinical setting involves a wide range of issues. Surgical techniques, preoperative and postoperative care, long-term outcomes follow-up, continuing education, and patient communication are a few of the important areas that surgeons deal with on a regular basis. Successful management of this information has an impact on clinical outcomes, direct patient care, financial decisions, and management of the surgeon's time. The development of a comprehensive electronic medical office is a powerful and probably necessary tool to successfully manage such information and achieve the goals of an effective and safe orthopaedic practice.

Correlating subjective and objective descriptors of ultra high molecular weight wear particles from total joint prostheses.

A total of 750 images of individual ultra-high molecular weight polyethylene (UHMWPE) particles isolated from periprosthetic failed hip, knee, and shoulder arthroplasties were extracted from archival scanning electron micrographs. Particle size and morphology was subsequently analyzed using computerized image analysis software utilizing five descriptors found in ASTM F1877-98, a standard for quantitative description of wear debris. An online survey application was developed to display particle images, and allowed ten respondents to classify particle morphologies according to commonly used terminology as fibers, flakes, or granules. Particles were categorized based on a simple majority of responses. All descriptors were evaluated using a one-way ANOVA and Tukey-Kramer test for all-pairs comparison among each class of particles. A logistic regression model using half of the particles included in the survey was then used to develop a mathematical scheme to predict whether a given particle should be classified as a fiber, flake, or granule based on its quantitative measurements. The validity of the model was then assessed using the other half of the survey particles and compared with human responses. Comparison of the quantitative measurements of isolated particles showed that the morphologies of each particle type classified by respondents were statistically different from one another (p<0.05). The average agreement between mathematical prediction and human respondents was 83.5% (standard error 0.16%). These data suggest that computerized descriptors can be feasibly correlated with subjective terminology, thus providing a basis for a common vocabulary for particle description which can be translated into quantitative dimensions.

Arthroscopy of the hip joint: an overview.

Hip arthroscopy is a procedure that is gaining popularity for treating hip pain related to intraarticular cartilage lesions or loose bodies. It offers an alternative procedure that can decrease or eliminate hip pain and increase a patient's ability to do activities of daily living. This article provides a comprehensive overview of hip arthroscopy and also addresses the anatomy of the hip, appropriate diagnoses for the procedure, operative considerations and postoperative teaching.

Virtual reality simulation of arthroscopy of the knee.

The virtual reality arthroscopic knee simulator (VR-AKS) consists of a computer platform, a video display, and two force-feedback (haptic) interfaces known as "PHANToMs" that also monitor the position of the instruments in the user's hands. The forces that the user would normally apply to the lower limb during arthroscopy are directed through an instrumented surrogate leg. Proprietary software provides the mathematical representation of the physical world and replicates the visual, mechanical, and behavioral aspects of the knee. This includes moderating the haptic interface and simultaneously executing a collision-detection algorithm that prevents the instruments from moving through "solid" surfaces. Modeling software interacts with this algorithm to send the appropriate images to the video display, including knee pathology such as meniscal tears and chondral defects as well as normal anatomy. Task-oriented programs monitor specific performance such as executing a proper examination of the knee or shaving a torn meniscus.

Standardized analysis of UHMWPE wear particles from failed total joint arthroplasties.

Periprosthetic tissue obtained at revision surgery from eight total hip replacement cases was hydrolyzed, and polyethylene debris particles were isolated from each case. Individual particles were analyzed by scanning electron microscopy (SEM) and computerized image analysis in accordance with ASTM F1877-98, a standard for quantitative description of wear debris. For comparison, periprosthetic tissues from eight total knee revision and four total shoulder revision cases were processed and analyzed with identical methods. A total of 2599 hip, 4345 knee, and 1200 shoulder particles were analyzed. The morphologies of the isolated polyethylene particles from the total hip specimens were distinctly different from the total knee and total shoulder particles. The mean equivalent circle diameter (ECD) for hip particles was 0.694 microm +/- 0.005; knee particles measured 1.190 microm +/-0.009; and shoulder particles 1.183 microm +/- 0.017. The ECD was significantly different between hip particles and those from the shoulder and knee. The mean aspect ratio (AR) for the hip particles was 1.626 +/- 0.015, compared to the knee particles at 1.935 +/- 0.015 and shoulder particles at 2.082 +/- 0.033. The AR was statistically different among all three groups. Other descriptors from the ASTM standard, elongation (E), form factor (FF), and roundness (R) were all significantly different among the three groups of joints. This study demonstrates the utility of ASTM F1877-98 in differentiating wear debris particles from different sources.