Fracture-Suspending Effect of the Patellar-Tendon-Bearing Cast

Svend-Hansen, H; Bremerskov, V.; Ostri, P

doi:10.3109/17453677908989761

Cited by 4 publications

(2 citation statements)

References 3 publications

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“…[7][8][9] Using hydraulic measurement Sakurai et al 7 found that a load of 40 kg led to a pressure of 9 kg (22.5%) on the patellar tendon. Svend-Hansen et al 8 measured the unloading effect using a pressure transducer on the sole of the foot and found no difference in the unloading rate between a below-knee cast, a PTB cast and an above-knee cast.…”

Section: Discussionmentioning

confidence: 99%

“…[2][3][4][5][6] There have, however, been few reports of its unloading effect. [7][8][9] We have used a new dynamic plantar monitoring system (F-SCAN) to evaluate this and have developed a new method for improving the degree of unloading. [10][11][12] We have investigated the unloading effect of the PTB cast, the contribution of each part of the cast to the overall effect, and the relationship between the depth of the free space under the plantar region inside the PTB cast and unloading.…”

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The effect of the patellar tendon-bearing cast on loading

Tanaka

Nagata

Goto

et al. 2000

The Journal of Bone and Joint Surgery. British volume

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We assessed the unloading effect of the patellar tendon-bearing (PTB) cast in five healthy volunteers using a new system for analysis of dynamic plantar pressure. We devised a method to improve the unloading effect of the PTB cast, and tested this using the same system.Our findings showed that the conventional PTB cast only achieved unloading of 30% of the body-weight and that the part of the cast on the leg had a more important role in the unloading than that which was in contact with the patellar tendon. When the depth of the free space under the foot inside the PTB cast was 1, 2 and 3 cm, the unloading effect was 60%, 80% and 98%, respectively.The unloading effect of the conventional PTB cast was disappointing at only 30% of body-weight. It was improved by producing a space between the sole of the foot and the cast, and was adjustable by altering the depth of this space. The patellar tendon-bearing (PTB) cast described by Sarmiento 1 has been widely used for the treatment of belowknee fractures. [2][3][4][5][6] There have, however, been few reports of its unloading effect. 7-9We have used a new dynamic plantar monitoring system (F-SCAN) to evaluate this and have developed a new method for improving the degree of unloading. [10][11][12] We have investigated the unloading effect of the PTB cast, the contribution of each part of the cast to the overall effect, and the relationship between the depth of the free space under the plantar region inside the PTB cast and unloading. Patients and MethodsThe F-SCAN system (Tekscan Inc, South Boston, Massachusetts) is a pressure-sensitive insole with 960 individual points on its surface. Since it is thin (0.18 mm) and flexible, it can fit any size or shape of foot. 10 The software is designed to display, compare, store and print data collected from the sensor. The peak pressure/centre-of-force display is used to summarise the data from a single gait cycle and record the peak pressure at each individual sensing cell over the time period of the stride. The unloading effect was assessed by measuring the weight borne by the whole surface of the sole when wearing the PTB cast using the F-SCAN system. The cast was applied unilaterally. An extension shoe was worn on the contralateral foot to compensate for the discrepancy in leg-length due to the heel on the cast.A sensor sheet was placed over the sole inside the PTB cast to determine the changes in the plantar pressure during weight-bearing and to compare them with the corresponding region of the contralateral free foot. The sensor sheets were set on each foot with no variation in sensitivity between the right and left feet. Both sheets were changed after each experiment to avoid any possible decrease in sensitivity with multiple use. Before measurements were taken the right and left sheets were calibrated under identical conditions, and placed in contact with the whole sole.In each experiment, ten sets of measurements were taken, with all subjects wearing a similar cast and walking on a flat surface indoors. Recordings were mad...

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Section: Discussionmentioning

confidence: 99%

mentioning

confidence: 99%

The effect of the patellar tendon-bearing cast on loading

Tanaka

Nagata

Goto

et al. 2000

The Journal of Bone and Joint Surgery. British volume

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Orthotic Management of the Mangled Extremity

Klenow

Stevens²

2021

The Mangled Extremity

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Cast application techniques for common pediatric injuries: A review

Sabeh

Aiyer

Summers

et al. 2020

Current Orthopaedic Practice

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Casting has become a lost art. Cast immobilization remains the mainstay of fracture treatment in the pediatric population. The purpose of a cast is to immobilize and hold the fracture in proper alignment while minimizing the functional impairment of the limb. Basic understanding of multiple cast types is obligatory for practitioners with exposure to pediatric trauma. This article aims to update the readers and allow them to improve their cast application techniques for common pediatric fractures as well as cast removal skills, resulting in safe and satisfactory fracture outcomes with minimal complications.

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Fracture-Suspending Effect of the Patellar-Tendon-Bearing Cast

Cited by 4 publications

References 3 publications

The effect of the patellar tendon-bearing cast on loading

The effect of the patellar tendon-bearing cast on loading

Orthotic Management of the Mangled Extremity

Cast application techniques for common pediatric injuries: A review

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