Defining massive rotator cuff tears: a Delphi consensus study.

BACKGROUND: A standard definition for massive rotator cuff tears (MRCTs) has not been identified. The purpose of this study is to use the modified Delphi technique to determine a practical, consensus definition for MRCTs. METHODS: This study is based on responses from 20 experts who participated in 4 rounds of surveys to determine a consensus definition for MRCT. Consensus was achieved when at least 70% of survey responders rated an item at least a 4 on a 5-point scale. A set of core characteristics was drafted based on literature review and then refined to achieve a consensus MRCT definition. RESULTS: The following core characteristics reached consensus in the first round: tear size, number of tendons torn, and degree of medial retraction. Magnetic resonance imaging (MRI) and intraoperative findings reached consensus as the modalities of diagnosis. The second round determined that tear size should be measured as a relative value. An initial definition for MRCT was proposed in the third round: retraction of tendon(s) to the glenoid rim and/or a tear with ≥67% greater tuberosity exposure (65% approval). A modified definition was proposed that specified that degree of retraction should be measured in the coronal or axial plane and that the amount of greater tuberosity exposure should be measured in the sagittal plane (90% approval). CONCLUSIONS: This study determined with 90% agreement that MRCT should be defined as retraction of tendon(s) to the glenoid rim in either the coronal or axial plane and/or a tear with ≥67% of the greater tuberosity exposed measured in the sagittal plane. The measurement can be performed either with MRI or intraoperatively.

Management of irreparable massive rotator cuff tears: a systematic review and meta-analysis of patient-reported outcomes, reoperation rates, and treatment response.

BACKGROUND: There is no consensus on the treatment of irreparable massive rotator cuff tears. The goal of this systematic review and meta-analysis was to (1) compare patient-reported outcome scores, (2) define failure and reoperation rates, and (3) quantify the magnitude of patient response across treatment strategies. METHODS: The MEDLINE, Embase, CENTRAL (Cochrane Central Register of Controlled Trials), and Scopus databases were searched for studies including physical therapy and operative treatment of massive rotator cuff tears. The criteria of the Methodological Index for Non-randomized Studies were used to assess study quality. Primary outcome measures were patient-reported outcome scores as well as failure, complication, and reoperation rates. To quantify patient response to treatment, we compared changes in the Constant-Murley score and American Shoulder and Elbow Surgeons (ASES) score with previously reported minimal clinically important difference (MCID) thresholds. RESULTS: No level I or II studies that met the inclusion and exclusion criteria were found. Physical therapy was associated with a 30% failure rate among the included patients, and another 30% went on to undergo surgery. Partial repair was associated with a 45% retear rate and 10% reoperation rate. Only graft interposition was associated with a weighted average change that exceeded the MCID for both the Constant-Murley score and ASES score. Latissimus tendon transfer techniques using humeral bone tunnel fixation were associated with a 77% failure rate. Superior capsular reconstruction with fascia lata autograft was associated with a weighted average change that exceeded the MCID for the ASES score. Reverse arthroplasty was associated with a 10% prosthesis failure rate and 8% reoperation rate. CONCLUSION: There is a lack of high-quality comparative studies to guide treatment recommendations. Compared with surgery, physical therapy is associated with less improvement in perceived functional outcomes and a higher clinical failure rate.

Self-audit of lockout/tagout in manufacturing workplaces: A pilot study.

BACKGROUND: Occupational health and safety (OHS) self-auditing is a common practice in industrial workplaces. However, few audit instruments have been tested for inter-rater reliability and accuracy. METHODS: A lockout/tagout (LOTO) self-audit checklist was developed for use in manufacturing enterprises. It was tested for inter-rater reliability and accuracy using responses of business self-auditors and external auditors. RESULTS: Inter-rater reliability at ten businesses was excellent (κ = 0.84). Business self-auditors had high (100%) accuracy in identifying elements of LOTO practice that were present as well those that were absent (81% accuracy). Reliability and accuracy increased further when problematic checklist questions were removed from the analysis. CONCLUSIONS: Results indicate that the LOTO self-audit checklist would be useful in manufacturing firms' efforts to assess and improve their LOTO programs. In addition, a reliable self-audit instrument removes the need for external auditors to visit worksites, thereby expanding capacity for outreach and intervention while minimizing costs.

National Machine Guarding Program: Part 1. Machine safeguarding practices in small metal fabrication businesses.

BACKGROUND: Metal fabrication workers experience high rates of traumatic occupational injuries. Machine operators in particular face high risks, often stemming from the absence or improper use of machine safeguarding or the failure to implement lockout procedures. METHODS: The National Machine Guarding Program (NMGP) was a translational research initiative implemented in conjunction with two workers' compensation insures. Insurance safety consultants trained in machine guarding used standardized checklists to conduct a baseline inspection of machine-related hazards in 221 business. RESULTS: Safeguards at the point of operation were missing or inadequate on 33% of machines. Safeguards for other mechanical hazards were missing on 28% of machines. Older machines were both widely used and less likely than newer machines to be properly guarded. Lockout/tagout procedures were posted at only 9% of machine workstations. CONCLUSIONS: The NMGP demonstrates a need for improvement in many aspects of machine safety and lockout in small metal fabrication businesses.

National Machine Guarding Program: Part 2. Safety management in small metal fabrication enterprises.

BACKGROUND: Small manufacturing businesses often lack important safety programs. Many reasons have been set forth on why this has remained a persistent problem. METHODS: The National Machine Guarding Program (NMGP) was a nationwide intervention conducted in partnership with two workers' compensation insurers. Insurance safety consultants collected baseline data in 221 business using a 33-question safety management audit. Audits were completed during an interview with the business owner or manager. RESULTS: Most measures of safety management improved with an increasing number of employees. This trend was particularly strong for lockout/tagout. However, size was only significant for businesses without a safety committee. Establishments with a safety committee scored higher (55% vs. 36%) on the safety management audit compared with those lacking a committee (P < 0.0001). CONCLUSIONS: Critical safety management programs were frequently absent. A safety committee appears to be a more important factor than business size in accounting for differences in outcome measures.

Relationship Analysis of Injured Workers' Average Weekly Wages and Workers' Compensation Indemnity Claims in Maine, US: 1998 to 2017.

OBJECTIVE: Explore the relationship between injured workers' average weekly wages (AWW) and their workers' compensation (WC) claims outcomes in Maine, US. METHODS: A total of 29,668 indemnity (lost-time) claims categorized into three wage-based percentile groups from a 20-year period (5-year intervals) were analyzed. WC outcomes included medical costs, number of indemnity checks, claim's duration, and claim settlements. RESULTS: Generally, claims within the lower percentile group were less likely to have high medical costs, but were more likely to have an elevated number of indemnity checks when compared to those in the middle percentile group. An inverse relationship was observed for those claims within the higher percentile group. CONCLUSIONS: Generalizations about low wage earners' claims being longer-lasting and more expensive or early return to work always reducing the medical cost of claims should be avoided.

Radiographic comparison of pegged and keeled glenoid components using modern cementing techniques: a prospective randomized study.

BACKGROUND: Modern cementing techniques have improved glenoid fixation, reduced glenoid lucency seen with keeled components, and may eliminate differences attributable to glenoid design. The purpose of this study was to determine the effect of glenoid design on immediate and follow-up radiographic lucency of pegged and keeled glenoid components, using modern cementing techniques. MATERIAL AND METHODS: Fifty-three total shoulder arthroplasties were performed in patients with primary glenohumeral osteoarthritis. Patients were randomized prospectively to receive either a pegged or keeled glenoid component. Three raters graded radiographic glenoid lucencies. RESULTS: On immediate radiographs, there was no significant difference in the rate of glenoid lucency between pegged (0%) and keeled (15%) glenoid components (P = .128). However, after an average of 26 months, the rate of glenoid lucency was significantly higher in patients with keeled components (46%) compared to patients with pegged components (15%) (P = .003). CONCLUSION: Even with modern cementing techniques, pegged glenoid components remain radiographically superior to keeled glenoid components.

Findings From the National Machine Guarding Program: A Small Business Intervention: Lockout/Tagout.

OBJECTIVE: Failure to implement lockout/tagout (LOTO) procedures adversely affects the rate of work-related fatalities and serious traumatic injury and is one of the most frequently cited Occupational Safety and Health Administration standards. This study assesses the impact of a nationwide intervention to improve LOTO in small metal fabrication businesses. METHODS: Insurance safety consultants conducted a standardized and validated evaluation of LOTO programs and procedures. Businesses received a baseline evaluation, two intervention visits, and a 12-month follow-up evaluation. RESULTS: The intervention was completed by 160 businesses. The mean LOTO procedure score improved from 8% to 33% (P < 0.0001), the mean program score went from 55% to 76% (P < 0.0001), and the presence of lockable disconnects went from 88% to 92% (P < 0.0001). CONCLUSIONS: This nationwide intervention showed substantial improvements in LOTO. It provides a framework for assessing and improving LOTO.

Findings From the National Machine Guarding Program-A Small Business Intervention: Machine Safety.

OBJECTIVES: The purpose of this nationwide intervention was to improve machine safety in small metal fabrication businesses (3 to 150 employees). The failure to implement machine safety programs related to guarding and lockout/tagout (LOTO) are frequent causes of Occupational Safety and Health Administration (OSHA) citations and may result in serious traumatic injury. METHODS: Insurance safety consultants conducted a standardized evaluation of machine guarding, safety programs, and LOTO. Businesses received a baseline evaluation, two intervention visits, and a 12-month follow-up evaluation. RESULTS: The intervention was completed by 160 businesses. Adding a safety committee was associated with a 10% point increase in business-level machine scores (P < 0.0001) and a 33% point increase in LOTO program scores (P < 0.0001). CONCLUSIONS: Insurance safety consultants proved effective at disseminating a machine safety and LOTO intervention via management-employee safety committees.

TennCare disenrollment and avoidable hospital visits in Davidson County, Tennessee.

The objective of this study was to determine if an association existed between the mid-2005 TennCare (Medicaid) disenrollment and increases in uninsured ambulatory care sensitive condition (ACSC) non-admitted ER visits and inpatient hospitalizations in Davidson County, Tennessee (= the city of Nashville). Logistic regression modeling, using an interactive term for insurance category x year, indicated that the effect of no insurance on ACSC ER visits increased by 18% from 2003 to 2007 (p<.001), but no significant effect was found for uninsured ACSC inpatient hospitalizations. These greater odds of ACSC ER visits among uninsured patients were associated with a 60% increase in hospitals' bad debt write offs during this same time period. Therefore, the TennCare disenrollment was associated with increased likelihood of uninsured ACSC non-admitted ER visits and greater financial losses for Davidson County hospitals during this time period.