Ergonomic Evaluation of the Scrub Nurse's Posture at Different Monitor Positions During Laparoscopic Cholecystectomy

Characterizing exposure to physical risk factors during veterinary surgery with wearable sensors: a pilot study

Occupational ApplicationsVeterinarians provide comprehensive health services for animals, but despite exposure to similar occupational and safety hazards as medical physicians, physical risk factors for these doctors and healthcare teams have not been characterized. In this pilot study, we used wearable sensor technology and showed that veterinary surgeons commonly experience static and demanding postures while performing soft tissue and orthopedic surgeries. Observations showed that muscle activation was highest in the right trapezius. Job factors such as surgical role (attending vs. assisting) and surgical specialty (soft tissue vs. orthopedics) appeared to influence exposure to physical risk factors. These findings suggest a need to consider the unique demands of surgical specialties in order to address the key risk factors impacting injury risks among veterinarians. For example, static postures may be a priority for soft tissue surgeons, while tools that reduce force requirements are more pressing for orthopedic surgeons.Technical AbstractBackground: Although musculoskeletal fatigue, pain, and injuries are commonly reported among surgeons in veterinary medicine, few studies have objectively characterized the exposure to physical risk factors among veterinary surgeons.Purpose: This study aimed to characterize muscle activation and postures of the neck and shoulders during live veterinary surgeries in the soft tissue and orthopedic specialties.Methods: Forty-four ergonomic exposure assessments (exposures) were collected during 26 surgical procedures across five surgeons. Exposures were collected from both soft tissue (n = 23) and orthopedic (n = 21) specialties. Physical risk factors were characterized by: 1) directly measuring muscle activation and posture of the neck and shoulders, using surface electromyography and inertial measurement units, respectively; and 2) collecting self-reported workload, pain, and stiffness.Results: Across the 44 exposures, neck and back symptoms respectively worsened after the surgery in 27% and 14% of the exposures. Veterinary surgeons exhibited neck postures involving a mean of 17° flexion during the surgical procedures. Static postures were common, occurring during 53-80% of the procedures. Compared to soft tissue procedures (e.g., 13.2% MVC in the right trapezius), higher muscle activity was observed during orthopaedic procedures (e.g., 27.6% MVC in the right trapezius).Conclusions: This pilot study showed that physical risk factors (i.e., muscle activity and posture of the neck/shoulder) can be measured using wearable sensors during live veterinary surgeries. The observed risk factors were similar to those documented for medical physicians. Further studies are needed to bring awareness to opportunities for improving workplace ergonomics in veterinary medicine and surgery.

Quantifying Intraoperative Workloads Across the Surgical Team Roles: Room for Better Balance?

Background

Surgical performance, provider health, and patient safety can be compromised when workload demands exceed individual capability on the surgical team. The purpose of this study is to quantify and compare intraoperative workload among surgical team members.

Methods

Observations were conducted for an entire surgical day for 33 participating surgeons and their surgical team at one medical institution. Workload (mental, physical, case complexity, distractions, and case difficulty) was measured for each surgical team member using questions from validated questionnaires. Statistical analyses were performed with a mixed effects model.

Results

A total of 192 surgical team members participated in 78 operative cases, and 344 questionnaires were collected. Procedures with high surgeon mental and physical workload included endovascular and gastric surgeries, respectively. Ratings did not differ significantly among surgeons and residents, but scrub nurses physical demand ratings were 14–22 (out of 100) points lower than the surgeons, residents, and surgical assistants. Residents reported the highest mental workload, averaging 19–24 points higher than surgical assistants, scrub nurses, and circulating nurses. Mental and physical demands exceeded 50 points 28–45 % of the time for surgeons and residents. Workload did not differ between minimally invasive and open techniques.

Conclusion

The workload questionnaires are an effective tool for quantifying intraoperative workload across the surgical team to ensure mental and physical demands do not exceed thresholds where performance may decrease and injury risk increase. This tool has the potential to measure the safety of current procedures and drive design of workload interventions.

[Analysis of the postures adopted by operating roomtechnicians during surgery]

OBJECTIVE

During surgery, surgical technicians adopt work positions that can be harmful to their musculoskeletal system. The literature has identified that damage to the musculoskeletal system in this group depends on whether the postures are static or dynamic, the surgical specialty, the type of surgery, the location of the instrument tables and the height of the operating table. However, this study identified the postures adopted by surgical technicians of a IV level institution of Bogotá during surgery, taking into account some of their personal and work characteristics, as well as some technical conditions of the procedures assisted by them, to determine the effects of these factors on their musculoskeletal system and to suggest modifications if necessary.

METHODOLOGY

In this descriptive study, the observation units were the surgical technicians and the units of analysis were the postures adopted by them. The Ovako Working Posture Analysing System (OWAS) was used to identify and to categorize them according to their effects on the musculoskeletal system.

RESULTS

491 postures were observed, of which 42.6% were in category 2 as per the OWAS method.

CONCLUSIONS

The adoption of category 2 postures was mainly related to the surgical specialty, the use of the Mayo instrument table, the anatomic region of the patient, the type of surgery, the shift, the number of procedures assisted within the shift and the surgical assistantship.