- Segmental foot and ankle kinematic differences between rectus, planus, and cavus foot types. [Journal Article]J Biomech 2019; 94:180-186JB
- The presence of multiple foot types has been used to explain the variability of foot structure observed among healthy adults. These foot types were determined by specific static morphologic features and included rectus (well aligned hindfoot/forefoot), planus (low arched), and cavus (high arched) foot types. Unique biomechanical characteristics of these foot types have been identified but reporte…
The presence of multiple foot types has been used to explain the variability of foot structure observed among healthy adults. These foot types were determined by specific static morphologic features and included rectus (well aligned hindfoot/forefoot), planus (low arched), and cavus (high arched) foot types. Unique biomechanical characteristics of these foot types have been identified but reported differences in segmental foot kinematics among them has been inconsistent due to differences in neutral referencing and evaluation of only select discrete variables. This study used the radiographically-indexed Milwaukee Foot Model to evaluate differences in segmental foot kinematics among healthy adults with rectus, planus, and cavus feet based on the true bony alignment between segments. Based on the definitions of the individual foot types and due to conflicting results in previous literature, the primary study outcome was peak coronal hindfoot position during stance phase. Additionally, locally weighted regression smoothing with alpha-adjusted serial t-test analysis (LAAST) was used to compare these foot types across the entire gait cycle. Average peak hindfoot inversion was -1.6° ± 5.1°, 6.7° ± 3.5°, and 13.6° ± 4.6°, for the Planus, Rectus, and Cavus Groups, respectively. There were significant differences among all comparisons. Differences were observed between the Rectus and Planus Groups and Cavus and Planus Groups throughout the gait cycle. Additionally, the Planus Group had a premature peak velocity toward coronal varus and early transition toward valgus, likely due to a deficient windlass mechanism. This assessment of kinematic data across the gait cycle can help understand differences in dynamic foot function among foot types.
- Improving the improvisational pelvic circumferential compression technique for open-book pelvic fractures using a simulation model and a sphygmomanometer. [Journal Article]J R Army Med Corps 2019JR
- CONCLUSIONS: Regardless of personnel's physical attributes, the addition of an improvisational windlass to a pelvic circumferential compression bedsheet can improve the ability to reduce an open-book fracture, especially in obese victims.
- Sweating the Little Things: Tourniquet Application Efficacy in Two Models of Pediatric Limb Circumference. [Journal Article]Mil Med 2019; 184(Suppl 1):361-366MM
- Current military recommendations include the use of tourniquets (TQ) in appropriate pediatric trauma patients. Although the utility of TQs has been well documented in adult patients, the efficacy of TQ application in pediatric patients is less clear. The current study attempted to identify physical constraints for TQ use in two simulated pediatric limb models.
Current military recommendations include the use of tourniquets (TQ) in appropriate pediatric trauma patients. Although the utility of TQs has been well documented in adult patients, the efficacy of TQ application in pediatric patients is less clear. The current study attempted to identify physical constraints for TQ use in two simulated pediatric limb models.
- Efficacy of the Abdominal Aortic Junctional Tourniquet-Torso Plate in a Lethal Model of Noncompressible Torso Hemorrhage. [Journal Article]J Spec Oper Med Winter 2018; 18(4):106-110JS
- CONCLUSIONS: The AAJT-TP did not provide any survival benefit compared with Hextend alone in this model of noncompressible torso hemorrhage.
- Three-dimensional variations in the lower limb caused by the windlass mechanism. [Journal Article]PeerJ 2017; 5:e4103P
- CONCLUSIONS: Kinematic analysis suggested that the higher the degree of extension the more movement will be generated. This reduces the level of impact the more distal the structure with respect to the 1st MTPJ, which has an impact on the entire leg. Because of the kinematic system used wasn't suitable, its impact wasn't exactly quantified.
- Preliminary Comparison of Pneumatic Models of Tourniquet for Prehospital Control of Limb Bleeding in a Manikin Model. [Journal Article]J Spec Oper Med 2016; 16(2):21-7JS
- CONCLUSIONS: All models of tourniquet performed equally well for both the critical outcome of effectiveness and the important outcome of pulse stoppage, whereas results for secondary outcomes (time, pressure, and blood loss) differed by model. The EMT had best performance for every type of measurement.
- Investigating biomechanical function of toes through external manipulation integrating analysis. [Clinical Trial]Acta Bioeng Biomech 2016; 18(1):97-102AB
- CONCLUSIONS: While no significance existed between bound and non-bound toes in kinematics, the medial forefoot had a smaller foot impulse and the hallux had a larger foot impulse for those with non-binding feet. This suggests that other functions such as the active gripping action of toes might be important for the efficiency of the foot windlass mechanism (the plantar fascia support), which would be beneficial for running performance improvement and foot injury prevention.
- Different Width and Tightening System: Emergency Tourniquets on Distal Limb Segments. [Journal Article]J Spec Oper Med 2015; 15(4):28-38JS
- CONCLUSIONS: All four designs can be effective on distal limb segments, the SWATT doing so with the lowest pressures and least pressure losses over time. The pressure change from Occlusion to Completion varies by tourniquet tightening system and can involve a pressure decrease with the windlass tightening systems. Pressure losses occur in as little as 120 seconds following Completion and so can loss of Occlusion. This is especially true for nonelastic strap tourniquet designs.
- Testing Tourniquet Use in a Manikin Model: Two Improvised Techniques. [Journal Article]J Spec Oper Med 2015; 15(4):21-6JS
- CONCLUSIONS: In the present experiment, the commercial CAT performed better than either improvised tourniquet.
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- Role of the Windlass in Improvised Tourniquet Use on a Manikin Hemorrhage Model. [Journal Article]J Spec Oper Med 2015; 15(2):42-6JS
- CONCLUSIONS: Improvised strap-and-windlass tourniquets were more effective than those with no windlass, as a windlass allowed the user to gain mechanical advantage. However, improvised strap-and-windlass tourniquets failed to control hemorrhage in 32% of tests.