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jnl:gan1995
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Title
The Effects of Ultrasound Treatment on Flexor Tendon Healing in the Chicken Limb
Abstract
We report the effects of early and late ultrasound treatment protocols on healing of surgically lacerated zone 2 flexor tendons in a chicken model. Ultrasound was administered directly using a coupling gel. Treatment was shown to increase range of movement, to advance scar maturation and to decrease the amount of inflammatory infiltrate around the repair site. No adverse effects on tensile strength were noted in either group. Early (starting 7 days post-operatively) administration was more effective than late (starting 42 days post-operatively) administration in achieving these effects. These results suggest that ultrasound therapy may be of benefit in the early healing process of flexor tendon lacerations.
Commentary
Direct vs direct application US wave?
Direct US in chicken – closest to human FDP tendon repair in 3rd toe (zone 2) 4/0 Kessler-Tajima Post-op immobilization
No, early (d7), late US (d42) 3 min with duty cycle 25%, 10 treatments a day. sacrificed at 4 and 8 weeks in-situ ROM 65g on FDP tendon tensile strength - strain 0.001 strain units - youngs modulus Histology - 2 each group with blinded assessment
Table 1 - Numerical values of ROM testing
| Time | No US | Early US | Late US | Unoperated |
|---|---|---|---|---|
| 4 wks | 1.9±0.4 (n=9) | 2.9±0.3 (n=10) | - | 7.9±0.3 (n=10) |
| 8 wks | 2.4±0.4* (n=8) | 4.0±0.5* (n=10) | 3.3±0.4 n=10) | 7.7±0.2 (n=10) |
ROM =range of movement. US - ultrasound. Values represent mean_+ SEM (mm). * Denotes P < 0.05.
Source
Gan, B. S., Huys, S., Sherebrin, M. H., & Scilley, C. G. (1995). The Effects of Ultrasound Treatment on Flexor Tendon Healing in the Chicken Limb. Journal of Hand Surgery, 20(6), 809–814. https://doi.org/10.1016/S0266-7681(95)80054-9
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