Lisa Ness MacFadden

Sanford Health · Engineering and Applied Sciences

Background Pitchers are prone to upper extremity injury due to repetitive high joint loads. Clinical measures of shoulder strength and range of motion (ROM) have shown links to injury risk in pitchers, however, these factors have rarely been studied in relation to throwing joint loads. The purpose of this study was to identify which clinical ROM an...

Aim: 3D printing is a growing technology with promising applications in orthopedic surgery. However, the utilization of 3D-printed surgical implants has not been fully explored. Materials & methods: One-third tubular plates and cortical screws were printed via fused deposition modeling using four materials: acrylonitrile butadiene styrene, carbon...

Background There is a lack of valid and reliable tests that assess upper extremity strength and function for rehabilitation and injury prevention purposes in throwing athletes. The Athletic Shoulder (ASH) test has been proposed as a reliable measure of shoulder strength, but has not yet been studied in baseball pitchers. Hypothesis/Purpose The pur...

Purpose Wide-awake local anesthesia with no tourniquet has dramatically changed hand surgery practice. Using lidocaine with epinephrine and no tourniquet has allowed many procedures to be moved from the main operating room to an in-office procedure room. Previous studies have shown that using local anesthesia is safe and cost effective, with high p...

Objective Assess lower-extremity blood flow restricted exercise (BFR) limb occlusion pressure (LOP) variability and identify related intrinsic characteristics using a portable Delphi BFR system. Design Repeated measures. Setting Laboratory. Participants Forty-two healthy males (n = 25) and females (n = 17) (25.8 ± 5.2 y, 1.76 ±0 .09 m, 78.9 ± 14...

Introduction Proper jump-landing neuromuscular control is crucial in mitigating lower-extremity musculoskeletal injuries. The presence of fatigue, especially in extreme environments, may degrade dynamic postural stability (DPS) and result in lower-extremity injuries. This study aimed to evaluate the influence of moderate intensity exercise in hot (...

Introduction: A commonly utilized method of measuring femoral stem migration in total hip arthroplasty (THA) on plain anteroposterior (AP) pelvis radiograph with referenced image magnification has not been rigorously evaluated. This study aims to validate the reproducibility of the methods used in this technique. Methods: A retrospective study o...

Background The impact of prior anterior cruciate ligament (ACL) reconstruction on total knee arthroplasty (TKA) has rarely been studied. The objective of this study was to compare intraoperative characteristics in patients who underwent TKA with preexisting hardware from prior ACL reconstruction with a matched cohort control group. Methods A retro...

Purpose: Evidence is lacking on the effect of different combinations of three stacked half-hitches and suture materials on the loop/ knot security of an arthroscopic knot under cyclic loading conditions. The specific aim of this study was to identify variables, such as stacked half-hitch configurations, suture materials, and testing environments,...

In January 2013, the Department of Defense lifted a ban that had prevented women from holding combat positions in the military. However, innate differences in physical traits and physiology between men and women likely will result in differences in physical performance. Sex differences in thermoregulation is a key area that needs to be examined due...

Author Muscles consume metabolic energy to generate movement. Performing a movement over a long period of time or at a high intensity strains the respiratory and cardiovascular systems that need to replenish the energy reserves in muscle. Furthermore, consuming and replenishing metabolic energy involves biochemical reactions with byproducts that c...

Ergometer force derivation. (DOCX)

Sensitivity analysis. (DOCX)

Optimization algorithm. (DOCX)

Validity of predictions using other muscle energetics models. (DOCX)

Rating of perceived exertion (RPE) is a scale of exercise difficulty and has been hypothesized to be a regulator of work rate during self-pacing. The goal of this work was to develop a dynamic prediction of RPE and to characterize the control strategy employed to reduce work rate during self-paced exercise using RPE as feedback. Training and test d...

Background: This article presents a model-based method for predicting primary blast injury. On the basis of the normalized work injury mechanism from previous work, this method presents a new model that accounts for the effects of blast orientation and species difference. Methods: The analysis used test data from a series of extensive experiment...

Functional electrical stimulation (FES) has the capacity to regenerate motion for individuals with spinal cord injuries. However, it is not straightforward to determine the stimulation parameters to generate a coordinated movement. Musculoskeletal models can provide a noninvasive simulation environment to estimate muscle force and activation timing...

Moment arms are important for understanding muscular behavior and for calculating internal muscle forces in musculoskeletal simulations. Biarticular muscles cross two joints and have moment arms that depend on the angle of both joints the muscles cross. The tendon excursion method was used to measure the joint angle-dependence of hamstring (biceps...

Spinal cord injuries result in a loss of control of the muscles and organs innervated by the nerves below the level of the injury and can have a significant impact on the quality of life for the individuals affected. Functional electrical stimulation (FES) techniques have provided a way, via neural prosthetics, to regenerate limited control of the...