Exploring the integration of diagnostic musculoskeletal ultrasound imaging into clinical practice by physical therapists

BACKGROUND

Musculoskeletal ultrasound (MSK-US) use for diagnostic purposes is expanding in physical therapy practice. Identifying and describing physical therapy-specific approaches to incorporating MSK-US into the evaluation process is needed. Musculoskeletal ultrasound extends the physical exam to allow clinicians to visualize anatomy and pathophysiology both statically and dynamically. Purpose: To document 1) weekly use of diagnostic MSK-US; and 2) clinical reasoning approach used in challenging patient cases by physical therapists (PTs) registered by Inteleos in musculoskeletal sonography (RMSK-certified).

METHODS

Longitudinal, observational, cohort study using mixed methods for data collection and analysis. All 23 currently RMSK-certified PTs using MSK-US in clinical practice across the United States were contacted, and 16 participated. Data were collected using an online survey created with the Research Electronic Data Capture System. Participants documented MSK-US clinical use and significant cases using weekly, reflective, online journals for three months. Demographic data were summarized using descriptive statistics. Case data were analyzed thematically.

RESULTS

Participating RMSK-certified PTs performed 1110 MSK-US examinations over 110 weeks. Clinicians averaged 7 (range 1-25) MSK-US examinations weekly, representing 28% of an average caseload. Examinations contributed significant anatomical/ pathological information 100% of the time. The most common joints scanned were the knee (n = 281), shoulder (n = 254), and wrist (n = 228). Case data revealed three themes: 1) augmenting the clinical evaluation to extend or narrow a diagnosis; 2) outcomes guiding action; and 3) lessons learned from clinical findings.

CONCLUSION

RMSK-certified PTs regularly used MSK-US to validate and refine their clinical diagnoses and treatment. Ultrasound imaging directly influenced patient care by informing the diagnostic process, guiding treatment, and appropriately identifying referrals.

Physical therapist awareness of diagnostic imaging referral jurisdictional scope of practice: an observational study

OBJECTIVES

To examine physical therapist awareness and utilization of imaging referral privileges in the United States (US) and how it relates to direct access frequency.

METHODS

This study utilized survey data collected in 2020-2021 from US physical therapists. Subjects were asked about imaging referral jurisdictional authority in their state. Responses were analyzed for accuracy and compared to the level of jurisdictional authority and its impact on imaging referral. Analysis of imaging skills performance and imaging referral practices were compared to direct access frequency.

RESULTS

Only 42.0% of physical therapists practicing in states that allow imaging referral were aware of this privilege. Those practicing where imaging referral was allowed via state legislation were significantly more likely (p < 0.01) to be aware of this privilege (71.4%) compared to those granted by the state board (25.2%). Those aware of their imaging referral scope were more likely (p < 0.01) to practice imaging referral (44.5%) compared to those who were unaware (3.2%). Direct access frequency was positively associated with imaging skill performance and imaging referral practice (p < 0.01). Doctors of Physical Therapy, residency/fellowship-trained physical therapists, and board-certified physical therapists all reported practicing greater frequency of direct access (p < 0.01).

DISCUSSION/CONCLUSION

There is a striking lack of awareness of imaging privileges among physical therapists as influenced by the level of jurisdictional scope. These results suggest that the lack of awareness may have a dampening effect on diagnostic imaging referrals. The American Physical Therapy Association should consider engaging with state boards to raise imaging privilege awareness.

Diagnostic Imaging for Distal Extremity Injuries in Direct Access Physical Therapy: An Observational Study

Background

Military physical therapists practicing direct-access routinely utilize diagnostic imaging and numerous published case reports demonstrate the ability of physical therapists to diagnose and appropriately disposition patients with foot/ankle and wrist/hand fractures. However, no larger cohort studies have explored the utilization of diagnostic imaging by physical therapists to detect fractures.

Hypothesis/Purpose

To describe the utilization of diagnostic imaging in foot/ankle and wrist/hand injuries by physical therapists in a direct-access sports physical therapy clinic.

Study Design

Retrospective cohort study.

Methods

The Agfa Impax Client 6 image viewing software (IMPAX) was searched from 2014 to 2018 for patients with diagnostic imaging ordered for foot/ankle and wrist/hand injuries. The Armed Forces Health Longitudinal Technology Application (AHLTA) electronic medical record was independently reviewed by the principal and co-investigator physical therapists. Data extracted were demographics and elements from the patient history and physical examination.

Results

In foot/ankle injuries, physical therapists diagnosed a fracture in 16% of the 177 cases and waited for an average of 3.9 days and 1.3 visits before ordering imaging. In wrist/hand injuries, physical therapists diagnosed a fracture in 24% of the 178 cases and waited for an average of 3.7 days and 1.2 visits before ordering imaging. The time to definitive care from the initial physical therapy evaluation was significantly different (p = 0.04) for foot/ankle fractures (0.6 days) compared to wrist/hand fractures (5.0 days). The Ottawa Ankle Rules demonstrated a negative likelihood ratio (-LR) of 0.11 (0.02, 0.72) and a positive likelihood ratio (+LR) of 1.99 (1.62, 2.44) for the diagnosis of foot/ankle fracture.

Conclusions

Physical therapists utilizing diagnostic imaging in a direct-access sports physical therapy clinic diagnosed fractures in similar proportions for foot/ankle and wrist/hand injuries and quickly dispositioned patients to definitive care for those fractures. The diagnostic accuracy of the Ottawa Ankle Rules was similar to previously reported values.

Level of Evidence

Level 3.

A call to action: direct access to physical therapy is highly successful in the US military. When will professional bodies, legislatures, and payors provide the same advantages to all US civilian physical therapists?

OBJECTIVES

In 2000, the American PT Association (APTA) published its Vision statement advocating for DA (DA) to PT. This narrative review of the literature aims to identify the current state of DA in the United States (US) and compare that status to the US Military.

METHODS

Initial PubMed search in the English language with keywords physical therapy (PT), physiotherapy, DA, self-referral, and primary contact from the year 2000 onwards with subsequent focused searches using keywords DA/self-referral/primary contact of physical therapists/physiotherapists on outcomes/autonomous practice/economic impact/patient satisfaction yielded 103 applicable studies on the topic. This paper excluded 40 international articles to focus on US military and civilian research.

RESULTS

Current literature supports Physical Therapists (PTs) in an initial contact role based on patient safety, satisfaction, access to care, efficiency, healthcare utilization, and potential cost savings.

CONCLUSIONS

Despite its success in the US Military, DA to PT in the US civilians remains limited and incomplete. PTs still await unrestricted DA and privileges associated with autonomous practice including the ability to order imaging and prescribe some medications.

Musculoskeletal Imaging for Low Back Pain in Direct Access Physical Therapy Compared to Primary Care: An Observational Study

BACKGROUND

Overutilization of diagnostic imaging is associated with poor outcomes and increased costs. Physical therapists demonstrate the ability to order diagnostic imaging safely and appropriately, and early access to physical therapy reduces unnecessary imaging, lowers healthcare costs, and improves outcomes.

HYPOTHESIS/PURPOSE

The primary purpose of this study was to compare rates of compliance with the National Committee for Quality Assurance - Healthcare Effectiveness Data and Information Set (HEDIS) recommendations for diagnostic imaging in low back pain between physical therapists and primary care providers in young, athletic patients.

STUDY DESIGN

Retrospective cohort study.

METHODS

Military Health System Data Repository (MDR) data from January 2019 to May 2020 was reviewed for compliance with the low back pain HEDIS recommendation. The low back pain imaging HEDIS measure identifies the percentage of patients who did not have an imaging study (plain X-ray, MRI, CT Scan) ordered on the first encounter with a diagnosis of low back pain or in the 28 days following that first diagnosis. Chi-square tests compared HEDIS compliance rates, with α = 0.05 set a priori.

RESULTS

From January 2019 to May 2020, in patients age 18-24, the MDR database identified 1,845 total visits for LBP identified in the Physical Therapy Clinic and 467 total visits for LBP in the Primary Care Clinic. In the Physical Therapy Clinic, 96.7% of encounters did not have imaging ordered within the first 28 days of onset of symptoms, compared with 82.0% in the Primary Care Clinic (p < .001).

CONCLUSIONS

Utilizing data from a national standardized healthcare performance measure, physical therapists practicing in a direct-access setting were significantly more likely than primary care providers to adhere to guidelines for low back pain imaging in young, athletic patients.

LEVEL OF EVIDENCE

Level 3.

Physiotherapists' ability to diagnose and manage shoulder disorders in an outpatient orthopedic clinic: results from a concordance study

BACKGROUND

Advanced practice physiotherapy has emerged as a promising solution to improve health care access because access to orthopedic care is limited in several countries. However, evidence supporting advanced practice physiotherapy models for the management of shoulder pain remains scarce. The purpose of this study was to establish diagnostic, surgical triage, and medical imaging agreement between advanced practice physiotherapists (APPs) and orthopedic surgeons (OSs) for the management of patients with shoulder disorders in an outpatient orthopedic clinic.

METHODS

Patients referred to an OS for shoulder complaints were recruited and independently assessed by an OS and an APP. Each provider completed a standardized form indicating diagnosis, imaging test requests, and triage of surgical candidates. Patient satisfaction with care was recorded with the 9-item Visit-Specific Satisfaction Questionnaire (VSQ-9). Inter-rater concordance was calculated with the Cohen κ, prevalence-adjusted bias-adjusted κ, and associated 95% confidence interval (CI). We used χ² tests to compare differences between providers in terms of treatment plan options and Student t tests to compare patient satisfaction between providers.

RESULTS

Fifty participants were evaluated. Good diagnostic agreement was observed between providers (κ, 0.80; 95% CI, 0.67-0.93). Agreement for triage of surgical candidates was moderate (κ, 0.46; 95% CI, 0.21-0.71) as APPs tended to refer patients more often to OSs for further evaluation. Imaging test request agreement was moderate as well (κ, 0.42; 95% CI, 0.19-0.66). Patient satisfaction with care was high, with no significant differences found between providers (P = .70).

CONCLUSION

APPs could improve access to orthopedic care for shoulder disorders by safely initiating patient care without compromising satisfaction. These results support further development and evaluation of APP care for orthopedic patients presenting with shoulder disorders.

Physical therapy musculoskeletal imaging authority: A survey of the World Confederation for Physical Therapy Nations

OBJECTIVES

Medical evidence largely supports PTs in expanded roles, however, healthcare policy within the United States (USA) typically restricts PTs from ordering musculoskeletal (MSK) imaging. It is unknown how MSK imaging policy in the USA compares to other World Confederation for Physical Therapy (WCPT) member nations. The primary objective of our study was to investigate the authority of PTs to order MSK imaging. A secondary objective was to identify factors associated with the authority for PTs to order MSK imaging.

METHODS

111 WCPT member nations were surveyed over a 2-month period on the authority of PTs ordering MSK imaging within their nation. A secondary analysis utilizing a step-wise binary regression compared member nation demographic statistics to MSK imaging authority.

RESULTS

81 member nations responded to the survey. 31 (38.3%) of member nations reported having some level of PT MSK imaging authority while 50 (61.7%) did not. Member nations with lower per capita healthcare costs were significantly more likely to allow PTs to order MSK imaging (p = 0.02). Those with direct access authority were 7.4 times more likely to authorize PTs to order MSK imaging (p < 0.01). Entry-level clinical degree and years of entry-level collegiate credit were not associated with imaging authority.

CONCLUSION

This is the first study to report MSK imaging policy within the WCPT member nations. While many nations within the WCPT allow PTs to order MSK imaging, the majority of nations still restrict PTs from such practice. Lower per capita healthcare costs and direct access authority were significant predictors of MSK imaging authority, however, causation cannot be established within the confines of this study. Future studies should consider issues such as restrictive policy origin (i.e. governmental vs. institutional), insurance reimbursement (i.e. private vs. public sector policy), and limitations on imaging modality.