Nonsurgical Management of Ulnar Collateral Ligament Injuries

Rehabilitation of an Upper Extremity Weight-Bearing Athlete with an Ulnar Collateral Ligament Injury: A Case Report

Background and Purpose

Ulnar collateral ligament (UCL) injury is a common elbow injury among overhead athletes, particularly baseball pitchers. However, limited research exists for non-throwing athletes, especially regarding rehabilitation. The purpose of this case report is to illustrate the use of early weight-bearing activities into the rehabilitation protocol for non-operative management of athletes with a UCL injury.

Case Description

The subject was a 17-year-old female competitive cheerleader. Two weeks prior, during the performance of an acrobatic skill in which she transitioned to full upper extremity (UE) weight-bearing, she sustained an injury to her right elbow. Physical therapy examination findings indicated a diagnosis of a UCL sprain. Self-reported outcome measures revealed a FOTO score of 69/100 and a Quick Dash score of 43/100. The subject attended 14 therapy sessions over nine weeks to address physical function and performance, which were assessed at intervals during her therapy program. Rehabilitation consisted of therapeutic exercise for the progression of UE functional weight-bearing including planks, ball push-ups, handstands, crab walks, stool pulls, handstand walks, and UE plyometric jumps.

Outcomes

Along with documented improvement of the standard musculoskeletal examination measures of range of motion, strength, and functional performance, the subject demonstrated no elbow instability and improved FOTO and Quick Dash scores of 98 and 0, respectively. The subject demonstrated 105% limb symmetry index with the return to sport (RTS) UE functional testing of one-armed seated shot-put throw (SSPT) and achieved normative values with the closed kinetic chain upper extremity stability test (CKCUEST).

Conclusion

This case report highlights the successful treatment of a subject with a UCL injury and the integration of therapy interventions with a focus on UE weight-bearing. Further research on performing high level UE weight-bearing activities during rehabilitation and RTS guidelines is needed.

Overarm Training Tolerance: A Pilot Study on the Use of Muscle Oxygen Saturation as a Biomarker

Ulnar collateral ligament (UCL) tears occur due to the prolonged exposure and overworking of joint stresses, resulting in decreased strength in the flexion and extension of the elbow. Current rehabilitation approaches for UCL tears involve subjective assessments (pain scales) and objective measures such as monitoring joint angles and range of motion. The main goal of this study is to find out if using wearable near-infrared spectroscopy technology can help measure digital biomarkers like muscle oxygen levels and heart rate. These measurements could then be applied to athletes who have been injured. Specifically, measuring muscle oxygen levels will help us understand how well the muscles are using oxygen. This can indicate improvements in how the muscles are healing and growing new blood vessels after reconstructive surgery. Previous research studies demonstrated that there remains an unmet clinical need to measure biomarkers to provide continuous, internal data on muscle physiology during the rehabilitation process. This study's findings can benefit team physicians, sports scientists, athletic trainers, and athletes in the identification of biomarkers to assist in clinical decisions for optimizing training regimens for athletes that perform overarm movements; the research suggests pathways for possible earlier detection, and thus earlier intervention for injury prevention.

The Utility of Stress Ultrasound in Identifying Risk Factors for Elbow Ulnar Collateral Ligament Tear: A Longitudinal Study of 203 Professional Baseball Players

BACKGROUND

Injuries to the medial ulnar collateral ligament (UCL) are common among baseball pitchers due to repetitive stress on the soft tissue stabilizers of the elbow during pitching. Dynamic stress ultrasound (SUS) can be used to evaluate the UCL and ulnohumeral joint to identify anatomic risk factors of those who will require UCL reconstruction (UCLR).

PURPOSE

To determine whether any adaptive or morphological changes detectable on SUS can predict injury to the UCL in professional baseball pitchers.

STUDY DESIGN

Cohort study; Level of evidence, 3.

METHODS

A total of 203 professional baseball pitchers who underwent SUS at preseason training sessions over the course of 18 years were categorized into 1 of 2 groups: those without a history of shoulder, arm, elbow, or forearm surgery or injuries (healthy cohort; n = 184) and those who underwent UCLR the same season as SUS (UCLR cohort; n = 19). Ligament thickness, joint spacing, and laxity were compared. An additional matched cohort analysis was conducted using 10 players from each group to detect differences in the progression of UCL and ulnohumeral joint measures in the year before injury.

RESULTS

The UCLR cohort, when compared with the healthy cohort, had higher relative (ie, nondominant-side measurements subtracted from dominant-side measurements) resting ulnohumeral joint space (median, 0.50 vs 0.20 mm, respectively; P = .006) and higher rates of hypoechoic foci (57.9% vs 30.4%, respectively; P = .030). Players of both groups had similar dominant UCL thickness (P = .161), ulnohumeral joint space at rest (P = .321), space under stress (P = .498), and laxity (P = .796). Groups did not differ in terms of relative UCL thickness, ulnohumeral joint space under stress, or relative laxity. In the year before UCL injury, the UCLR cohort, compared with the matched healthy cohort, had a greater increase in mean dominant UCL thickness (0.94 vs -0.60 mm, respectively; P = .038) and a greater increase in relative median UCL thickness (1.35 vs -0.35 mm, respectively; P = .045). Players in the healthy cohort were statistically older than those in the UCLR cohort (23 vs 22 years, respectively; P = .004). No differences in ulnohumeral stress spacing or laxity were detected.

CONCLUSION

SUS of players who underwent UCLR demonstrated a progressive increase in UCL thickness over 1 year, higher rates of hypoechoic foci, and increased ulnohumeral rest space compared with SUS of uninjured players.

The Management of Valgus Extension Overload Syndrome Experienced with Hitting in a High School Baseball Player: A Case Report

Background

Valgus extension overload syndrome (VEOS) of the elbow is a condition associated with overhead athletes. However, the non-surgical management of these individuals is not well documented.

Purpose

To discuss the unique presentation, management, and outcomes of an adolescent baseball player with a chronic history of VEOS experienced during hitting.

Case Description

A 15-year-old right-handed high school baseball catcher presented with a six-month history of right-sided ulnar elbow pain. Elbow MRI w/ contrast was consistent with VEOS. The initial examination demonstrated excessive resting right-sided humeral external rotation compared to his left. Valgus stress testing in the subject's hitting position reproduced symptoms, which were alleviated with retest while correcting excessive humeral external rotation. Weakness of the humeral internal rotators and stiffness/shortness of the posterior shoulder were found and thought to relate to the humeral contribution to his elbow movement dysfunction. Rehabilitation emphasized addressing impairments contributing to excessive humeral external rotation with reintegration into batting.

Outcomes

After five weeks of physical therapy, the subject returned to soft toss hitting at approximately 75% velocity for the first time since symptom onset, without pain. At seven months after discharge, a phone conversation confirmed that the subject had returned to baseball without limitations.

Discussion

Despite the concept of 'regional interdependence', common proximal impairments are often assumed to contribute to elbow pain without a clear biomechanical rationale. Future research demonstrating the specific biomechanical effects of the shoulder on the elbow is needed, in addition to more accessible examination strategies to assess their relationship.

Level of Evidence

5.