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Deanna S Asakawa - One of the best experts on this subject based on the ideXlab platform.
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ASB pre-doctoral young investigator award 2001 In vivo motion of the Rectus Femoris Muscle after tendon transfer surgery
2020Co-Authors: Deanna S Asakawa, Silvia S Blemker, Garry E Gold, Scott L DelpAbstract:Rectus Femoris transfer surgery is performed to convert the Rectus Femoris Muscle from a knee extensor to a knee flexor. In this surgery, the distal tendon of the Rectus Femoris is detached from the patella and reattached to one of the knee flexor tendons. The outcomes of this procedure are variable, and it is not known if the surgery successfully converts the Muscle to a knee flexor. We measured the motion of Muscle tissue within the Rectus Femoris and vastus intermedius during knee extension in 10 unimpaired control subjects (10 limbs) and 6 subjects (10 limbs) after Rectus Femoris transfer using cine phase-contrast magnetic resonance imaging. Displacements of the vastus intermedius during knee extension were similar between control and tendon transfer subjects. In the control subjects, the Rectus Femoris Muscle consistently moved in the direction of the knee extensors and displaced more than the vastus intermedius. The Rectus Femoris also moved in the direction of the knee extensors in the tendon transfer subjects; however, the transferred Rectus Femoris displaced less than the vastus intermedius. These results suggest that the Rectus Femoris is not converted to a knee flexor after its distal tendon is transferred to the posterior side of the knee, but its capacity for knee extension is diminished by the surgery. r 2002 Elsevier Science Ltd. All rights reserved.
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in vivo motion of the Rectus Femoris Muscle after tendon transfer surgery
Journal of Biomechanics, 2002Co-Authors: Deanna S Asakawa, Silvia S Blemker, Garry E Gold, Scott L DelpAbstract:Abstract Rectus Femoris transfer surgery is performed to convert the Rectus Femoris Muscle from a knee extensor to a knee flexor. In this surgery, the distal tendon of the Rectus Femoris is detached from the patella and reattached to one of the knee flexor tendons. The outcomes of this procedure are variable, and it is not known if the surgery successfully converts the Muscle to a knee flexor. We measured the motion of Muscle tissue within the Rectus Femoris and vastus intermedius during knee extension in 10 unimpaired control subjects (10 limbs) and 6 subjects (10 limbs) after Rectus Femoris transfer using cine phase-contrast magnetic resonance imaging. Displacements of the vastus intermedius during knee extension were similar between control and tendon transfer subjects. In the control subjects, the Rectus Femoris Muscle consistently moved in the direction of the knee extensors and displaced more than the vastus intermedius. The Rectus Femoris also moved in the direction of the knee extensors in the tendon transfer subjects; however, the transferred Rectus Femoris displaced less than the vastus intermedius. These results suggest that the Rectus Femoris is not converted to a knee flexor after its distal tendon is transferred to the posterior side of the knee, but its capacity for knee extension is diminished by the surgery.
Scott L Delp - One of the best experts on this subject based on the ideXlab platform.
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ASB pre-doctoral young investigator award 2001 In vivo motion of the Rectus Femoris Muscle after tendon transfer surgery
2020Co-Authors: Deanna S Asakawa, Silvia S Blemker, Garry E Gold, Scott L DelpAbstract:Rectus Femoris transfer surgery is performed to convert the Rectus Femoris Muscle from a knee extensor to a knee flexor. In this surgery, the distal tendon of the Rectus Femoris is detached from the patella and reattached to one of the knee flexor tendons. The outcomes of this procedure are variable, and it is not known if the surgery successfully converts the Muscle to a knee flexor. We measured the motion of Muscle tissue within the Rectus Femoris and vastus intermedius during knee extension in 10 unimpaired control subjects (10 limbs) and 6 subjects (10 limbs) after Rectus Femoris transfer using cine phase-contrast magnetic resonance imaging. Displacements of the vastus intermedius during knee extension were similar between control and tendon transfer subjects. In the control subjects, the Rectus Femoris Muscle consistently moved in the direction of the knee extensors and displaced more than the vastus intermedius. The Rectus Femoris also moved in the direction of the knee extensors in the tendon transfer subjects; however, the transferred Rectus Femoris displaced less than the vastus intermedius. These results suggest that the Rectus Femoris is not converted to a knee flexor after its distal tendon is transferred to the posterior side of the knee, but its capacity for knee extension is diminished by the surgery. r 2002 Elsevier Science Ltd. All rights reserved.
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in vivo motion of the Rectus Femoris Muscle after tendon transfer surgery
Journal of Biomechanics, 2002Co-Authors: Deanna S Asakawa, Silvia S Blemker, Garry E Gold, Scott L DelpAbstract:Abstract Rectus Femoris transfer surgery is performed to convert the Rectus Femoris Muscle from a knee extensor to a knee flexor. In this surgery, the distal tendon of the Rectus Femoris is detached from the patella and reattached to one of the knee flexor tendons. The outcomes of this procedure are variable, and it is not known if the surgery successfully converts the Muscle to a knee flexor. We measured the motion of Muscle tissue within the Rectus Femoris and vastus intermedius during knee extension in 10 unimpaired control subjects (10 limbs) and 6 subjects (10 limbs) after Rectus Femoris transfer using cine phase-contrast magnetic resonance imaging. Displacements of the vastus intermedius during knee extension were similar between control and tendon transfer subjects. In the control subjects, the Rectus Femoris Muscle consistently moved in the direction of the knee extensors and displaced more than the vastus intermedius. The Rectus Femoris also moved in the direction of the knee extensors in the tendon transfer subjects; however, the transferred Rectus Femoris displaced less than the vastus intermedius. These results suggest that the Rectus Femoris is not converted to a knee flexor after its distal tendon is transferred to the posterior side of the knee, but its capacity for knee extension is diminished by the surgery.
Garry E Gold - One of the best experts on this subject based on the ideXlab platform.
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ASB pre-doctoral young investigator award 2001 In vivo motion of the Rectus Femoris Muscle after tendon transfer surgery
2020Co-Authors: Deanna S Asakawa, Silvia S Blemker, Garry E Gold, Scott L DelpAbstract:Rectus Femoris transfer surgery is performed to convert the Rectus Femoris Muscle from a knee extensor to a knee flexor. In this surgery, the distal tendon of the Rectus Femoris is detached from the patella and reattached to one of the knee flexor tendons. The outcomes of this procedure are variable, and it is not known if the surgery successfully converts the Muscle to a knee flexor. We measured the motion of Muscle tissue within the Rectus Femoris and vastus intermedius during knee extension in 10 unimpaired control subjects (10 limbs) and 6 subjects (10 limbs) after Rectus Femoris transfer using cine phase-contrast magnetic resonance imaging. Displacements of the vastus intermedius during knee extension were similar between control and tendon transfer subjects. In the control subjects, the Rectus Femoris Muscle consistently moved in the direction of the knee extensors and displaced more than the vastus intermedius. The Rectus Femoris also moved in the direction of the knee extensors in the tendon transfer subjects; however, the transferred Rectus Femoris displaced less than the vastus intermedius. These results suggest that the Rectus Femoris is not converted to a knee flexor after its distal tendon is transferred to the posterior side of the knee, but its capacity for knee extension is diminished by the surgery. r 2002 Elsevier Science Ltd. All rights reserved.
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in vivo motion of the Rectus Femoris Muscle after tendon transfer surgery
Journal of Biomechanics, 2002Co-Authors: Deanna S Asakawa, Silvia S Blemker, Garry E Gold, Scott L DelpAbstract:Abstract Rectus Femoris transfer surgery is performed to convert the Rectus Femoris Muscle from a knee extensor to a knee flexor. In this surgery, the distal tendon of the Rectus Femoris is detached from the patella and reattached to one of the knee flexor tendons. The outcomes of this procedure are variable, and it is not known if the surgery successfully converts the Muscle to a knee flexor. We measured the motion of Muscle tissue within the Rectus Femoris and vastus intermedius during knee extension in 10 unimpaired control subjects (10 limbs) and 6 subjects (10 limbs) after Rectus Femoris transfer using cine phase-contrast magnetic resonance imaging. Displacements of the vastus intermedius during knee extension were similar between control and tendon transfer subjects. In the control subjects, the Rectus Femoris Muscle consistently moved in the direction of the knee extensors and displaced more than the vastus intermedius. The Rectus Femoris also moved in the direction of the knee extensors in the tendon transfer subjects; however, the transferred Rectus Femoris displaced less than the vastus intermedius. These results suggest that the Rectus Femoris is not converted to a knee flexor after its distal tendon is transferred to the posterior side of the knee, but its capacity for knee extension is diminished by the surgery.
Susumu Watanabe - One of the best experts on this subject based on the ideXlab platform.
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Muscle thickness and echo intensity measurements of the Rectus Femoris Muscle of healthy subjects intra and interrater reliability of transducer tilt during ultrasound
Journal of Bodywork and Movement Therapies, 2017Co-Authors: Hiroshi Ishida, Tadanobu Suehiro, Keita Suzuki, Susumu WatanabeAbstract:Abstract This study aimed to assess the intra and interrater reliability of transducer tilt during the ultrasound (US) measurements of the Muscle thickness and the echo intensity of the Rectus Femoris Muscle (RF). Fourteen healthy male subjects (20.8 ± 0.8 years) participated in this study. The transducer tilt was measured using a digital angle gauge (°) during US. Two experimenters took two images to measure the Muscle thickness (mm) and the echo intensity (a.u.: arbitrary unit). The intra and interclass correlation coefficient (ICC), standard error of measurement (SEM), and minimal detectable change (MDC) were also calculated. These measurements were immediately repeated. The ICC for the intrarater reliability for the transducer tilt, Muscle thickness, and echo intensity were 0.96 (SEM: 0.9°, MDC: 2.6°), 0.99 (SEM: 0.4 mm, MDC: 0.1 mm), and 0.97 (SEM: 0.6 a.u., MDC: 1.7 a.u.), respectively. The ICC for the interrater reliability for the transducer tilt, Muscle thickness, and echo intensity were 0.40 (SEM: 4.0°, MDC: 11.1°), 0.96 (SEM: 0.7 mm, MDC: 2.0 mm), and 0.95 (SEM: 0.9 a.u., MDC: 2.4 a.u.), respectively. The intrarater reliability of the transducer tilt was reliable, but the interrater reliability was questionable. Meanwhile, both the intra- and interrater reliability of the Muscle thickness and the echo intensity were reliable.
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influence of the ultrasound transducer tilt on Muscle thickness and echo intensity of the Rectus Femoris Muscle of healthy subjects
Journal of Physical Therapy Science, 2017Co-Authors: Hiroshi Ishida, Tadanobu Suehiro, Keita Suzuki, Tsuyoshi Yoneda, Susumu WatanabeAbstract:: [Purpose] This study aimed to assess the influence of ultrasound (US) transducer tilt on Muscle thickness and echo intensity of the Rectus Femoris Muscle (RF) in healthy subjects. [Subjects and Methods] Fourteen healthy male subjects (20.8 ± 0.8 years) participated in this study. Transducer tilt was measured during US, with a digital angle gauge. Muscle thickness and echo intensity were measured in 4 transducer tilt conditions: reference angle; +3°; +6°; and +9° cranial from the reference angle. [Results] All differences in transducer tilt relative to the reference condition were larger than the minimal detectable change (MDC) of the reference condition. All differences in Muscle thickness relative to the reference condition were not larger than the MDC of the reference condition. All differences in the echo intensity relative to the reference condition, except between the reference and the +3° condition, were larger than the MDC of the reference condition. [Conclusion] Our results indicated that an examiner should maintain a precise transducer tilt during repeated US measurements to quantify the minimal change in the echo intensity of the RF.
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influence of inward pressure of the transducer on thickness and echo intensity of the Rectus Femoris Muscle during ultrasonography
Middle East Journal of Rehabilitation and Health, 2016Co-Authors: Hiroshi Ishida, Tadanobu Suehiro, Susumu WatanabeAbstract:Background: Muscle ultrasonography (US) can be used to evaluate Muscle quantity and quality aected by a neuromuscular dis- ease and aging. The evaluation of Muscle thickness and echo intensity using US are useful ways of estimating Muscle mass and composition. During US, diligent attention to steadying the position, orientation, and inward pressure of a transducer is required; however, little is known about the quantitative influence of dierent inward pressures of the transducer on Muscle thickness and echo intensity during US. Objectives: The purpose of this study was to quantify the changes in Muscle thickness and echo intensity induced by dierent inward pressures of the transducer during US. Materials and Methods: Fifteen healthy male volunteers (mean SD, 20.7 0.7 years old) participated in the study. Thickness and echo intensity of the right Rectus Femoris Muscle (RF) was measured by US in the following three conditions: inward pressures of 0.5 N, 1.0 N, and 2.0 N. A repeated-measures ANOVA was utilized to determine the influence of inward pressure on the thickness and echo intensity of the RF. Results: Muscle thickness was significantly decreased during increased inward pressures of the transducer among the three con- ditions (P < 0.001). On the other hand, echo intensity from the 0.5-N to 1.0-N condition was significantly decreased (P = 0.002), and from the 1.0-N to 2.0-N condition, it was significantly increased (P = 0.019). Conclusions: Our results indicate that changes in Muscle thickness and echo intensity are induced by dierent inward pressures of the transducer during US. When using a technique that involves a handheld transducer, the examiner should attempt to maintain consistent inward pressure of the transducer during US, to quantify the minimal change of the RF mass and composition.
Barend Mees - One of the best experts on this subject based on the ideXlab platform.
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outcome of Rectus Femoris Muscle flaps for groin coverage after vascular surgery
Journal of Vascular Surgery, 2020Co-Authors: L F Wubbeke, Jurek Z M Conings, Janwillem Elshof, Marc R Scheltinga, Janwillem H Daemen, Michael J Jacobs, Barend MeesAbstract:Abstract Objective The aim of this retrospective cohort study was to investigate the outcome of Rectus Femoris Muscle flaps (RFFs) for deep groin wound complications in vascular surgery patients and to compare the outcome with a cohort of sartorius Muscle flaps (SMFs) because the RFF is a promising alternative technique for groin coverage. Methods All RFFs and SMFs performed by vascular surgeons in a regional collaboration in The Southern Netherlands were retrospectively reviewed. Primary outcomes were Muscle flap survival, overall and secondary graft salvage, and limb salvage. Secondary outcomes were 30-day groin wound complications and mortality, donor site and vascular complications, 1-year amputation-free survival, overall patient survival, impaired knee extensor function, and length of hospital stay. Results A total of 96 RFFs were performed in 88 patients (mean age, 68 years; 67% male) and compared with a cohort of 30 SMFs in 28 patients (mean age, 64 years; 77% male). At a mean follow-up of 29 months and 23 months, respectively, comparable flap survival (94% vs 90%), secondary graft salvage (80% vs 92%), and limb salvage (89% vs 90%) rates were found. The 30-day mortality rates were 12% and 17%, respectively, and the 1-year amputation-free survival was comparable between treatment groups (71% vs 68%). Conclusions This study presents a large series of RFFs for deep groin wound complications after vascular surgery. We demonstrate that Muscle flap coverage using the Rectus Femoris Muscle by vascular surgeons is an effective way to manage complex groin wound infections in a challenging group of patients, achieving similarly good results as the SMF.
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thigh Muscle flaps for postoperative inguinal wound complications in vascular surgery sartorius Muscle versus Rectus Femoris Muscle
Chirurg, 2019Co-Authors: L F Wubbeke, Janwillem H Daemen, Michael J Jacobs, Paula R Keschenau, Drosos Kotelis, Barend MeesAbstract:BACKGROUND: Inguinal wound complications often cause postoperative morbidity and also mortality following vascular surgical interventions. The aim of this study was to report experiences and a comparison of the outcomes using Rectus Femoris Muscle flaps (RFF) and sartorius Muscle flaps (SMF). MATERIAL AND METHODS: A retrospective study was performed at two locations of a cross-border vascular center and all Muscle flap interventions performed at the two centers within the vascular surgery department were reviewed. Primary outcomes were Muscle flap survival, graft salvage and major amputations. RESULTS: A total of 44 RFFs were performed in 39 patients (mean age 67 years, 73% males) and 25 SMFs in 24 patients (mean age 64 years, 76% males). Wound infections were the most common indications for Muscle flap reconstruction. At a mean follow-up of 24 months (±24) and 17 months (±20), respectively, comparable flap survival rates (91% vs. 84%), wound healing rates (72% vs. 83%), graft salvage (65% vs. 73%) and amputation rates (9% vs. 8%) were found. CONCLUSION: Muscle flap reconstruction is an effective way to cover groin defects resulting from deep wound infections after vascular surgery, achieving good results in a high-risk group of patients. No differences were found between SMF and RFF regarding amputation and graft loss. Both techniques can be safely performed, depending on the preference and experience of the surgical team. The RFF technique should be preferentially used to cover large tissue defects, whereas the SMF procedure can be preferred to cover smaller defects in the groin.