Structural Anatomy
Permanent URI for this collectionhttps://hdl.handle.net/20.500.12503/30827
Browse
Browsing Structural Anatomy by Author "Finnerty, Cait"
Now showing 1 - 2 of 2
- Results Per Page
- Sort Options
Item Additive Effects of Diabetes and Lower-Limb Amputation on Osteoarthritis with Comparison to Diabetic and Healthy Controls(2022) Ngo, Wayne; Finnerty, Cait; Finco, MG; Holley, Bethany; Menegaz, Rachel A.Purpose: Individuals with type II diabetes and individuals with lower-limb amputation each have increased risks of developing osteoarthritis compared to the general population. Despite the high co-occurrence of type II diabetes with lower-limb amputations, the additive effects of these conditions are unclear. In order to better manage the risk of developing osteoarthritis in these populations, a better understanding of how diabetes and amputation might compound osteoarthritis risk is needed. Methods: We measured hip and knee joint space, as indicators of osteoarthritis, in four groups of individuals: 1) lower-limb amputees with diabetes, 2) lower-limb amputees without diabetes 3) diabetic controls, and 4) healthy controls. We hypothesized lower-limb amputees with diabetes would have the most impaired musculoskeletal health, followed by amputees without diabetes, diabetic controls, then healthy controls. 30 total CT scans of males (42-79 years; BMI 19.7 - 48.9 kg/m2) were obtained from the New Mexico Decedent Image Database. 10 scans were identified for amputees, diabetic controls, and healthy controls. Half of the lower-limb amputees had diabetes while half did not, to differentiate effects of diabetes and amputation on musculoskeletal health. 3D Slicer software was used to measure hip and knee joint spaces as indicators of osteoarthritis. Comparisons between groups were assessed using Kruskal-Wallis with Dunn's post hoc tests. Results: Amputees with and without diabetes showed significantly narrower hip (p=0.01) and knee (p=0.08) joint space bilaterally compared to diabetic and healthy controls. This result suggests amputees could be at a higher risk of developing lower-limb osteoarthritis compared to diabetic and healthy individuals, which is in line with prior work demonstrating the prevalence of osteoarthritis in the amputee population. Conclusions: In agreement with our hypothesis, box plots showed trends of amputees with diabetes having the most narrowed joint space, followed by amputees without diabetes, then diabetic controls, and healthy controls. While not statistically significant, these trends suggest amputees with diabetes are at increased risk of developing osteoarthritis compared to amputees without diabetes. Perhaps the aggressive management of blood glucose and post-amputation physiotherapy treatments could help reduce joint deterioration in these patients. Future work will focus on increasing sample size to assess if these findings are generalizable to a larger population. Increased risks of osteoarthritis can lead to pain, limited mobility, and decreased quality of life. This study can potentially inform clinical standards of care for patients with amputations. Earlier interventions such as proactive musculoskeletal screenings and targeted exercises may reduce risks of developing osteoarthritis, leading to improved clinical outcomes.Item Musculoskeletal Differences Between Amputated and Non-Amputated Lower Limbs(2022) Finco, MG; Finnerty, Cait; Ngo, Wayne; Holley, Bethany; Menegaz, Rachel A.Purpose: People with lower limb amputations frequently experience greater risks of musculoskeletal injury. Forces active during walking help to develop and maintain the shape, volume, and strength of musculoskeletal tissues. Conversely, altered walking patterns following limb loss may lead to atrophy of muscle and bone tissues. Reductions in joint spaces are indicative of excess stress placed on the limb, which may lead to osteoarthritis. Bone loss in high stress regions like the femoral neck can reduce the bone's ability to resist compressive or rotational movements, making the bone more susceptible to fracture. The aim of this study was to measure musculoskeletal differences between an individual's residual (amputated) limb and intact (non-amputated) limb to identify structures vulnerable to injury. We hypothesized that the residual limb, compared to the intact limb, would show: 1) less muscle mass and more fat as indicators of muscle atrophy, 2) wider hip and knee joint spaces as indicators of osteoarthritis in the intact limb, and 3) decreased femoral neck width as an indicator of fracture risk. Methods: CT scans of 10 males (42-79 years) were obtained from the New Mexico Decedent Image Database. 3D Slicer software was used to measure gross skeletal properties, hip and knee joint dimensions, and cross-sectional muscle and fat tissue areas at the midshaft. A Wilcoxon Signed-Rank test was used to assess the differences between residual and intact limbs. The significance level was set at α ≤ 0.10 due to a small sample size. Results: Compared to the intact limb, the residual limb had significantly less muscle tissue area (p=0.010) and a significantly narrower femoral neck width (p=0.077). No significant differences were found in hip or knee joint spaces between limbs. Conclusions: In agreement with hypotheses 1 and 3, these results suggest residual limbs are at increased risk of muscle atrophy and femoral neck fracture compared to intact limbs. Loading inequalities between the residual and intact limb likely contribute to these results. A better understanding of the structural properties associated with musculoskeletal atrophy could inform targeted therapies to reduce the likelihood of injury in this population. Future studies will assess biomechanical properties, such as moment of inertia, to better understand the residual limb's ability to withstand torsional forces and fracture. Additional data on how musculoskeletal tissues respond to unloading at multiple structural levels can improve clinical interventions for lower limb strength and function in amputees.