0000000000009974
AUTHOR
U. Harland
Sonography and MRI of experimental muscle injuries
After sonographical examination with a 7.5-MHz linear array scanner, we created an experimental muscle injury of known sitze and location on 28 New Zealand white rabbits by stabbing them with a scalpel in the supraspinatus muscle. The changes in the healing process were followed and documented by sonography and magnetic resonance imaging (MRI) before and 2, 5, 11, 14, 36 and 64 days after injury. The changes in sonography and MRI followed a regular course. Ultrasound revealed an echo-poor area after injury with ever increasing echogenicity from the 14th day. Strong reflexes were found after 2 months. MRI showed few changes, only a slight increase of signal intensity, but a characteristic cu…
Sonographische Verlaufskontrolle von experimentellen Muskelverletzungen
Experimental muscle lesions were produced in 28 rabbits by stab incision, thus creating a lesion of known extent and site. The changes in the course of healing were followed up and documented at short intervals for a period of two months via sonography. The changes take place in regular course and can be explained by fine tissue changes, taking into consideration the fundamentals of theoretical ultrasound physics. Sonography renders both valuable assistance in diagnosing muscular lesions and in following up the healing process--the latter, however, with some reservations due to the clinical terminology defining the extent of muscular lesions.
Changes of sonographic, magnetic resonance tomographic, electromyographic, and histopathologic findings within a 2-month period of examinations after experimental muscle denervation
This study compares sonographical, histopathological, magnetic resonance imaging (MRI), and electromyographical (EMG) findings following acute muscle denervation. We performed an experimental denervation of the supraspinatus and infraspinatus muscles on 35 New Zealand white rabbits by segment resection of the suprascapular nerve. The sonographical appearance of the supraspinatus muscle was followed and documented at short time intervals within a 2-month follow-up period. The sonographical, histopathological, and MRI changes due to denervation suggest a regular pattern. Apart from the reduction of the muscle diameter, there were considerable sonographical signs of denervation with an increas…
A sonographical follow-up of experimental injuries on rabbit achilles tendons
An 28 Neuseelandkaninchen wurde eine experimentelle partielle Durchtrennung der Achillessehne durchgefuhrt. Die Veranderungen im Verlauf der Heilung wurden nach einem festen Untersuchungsschema in kurzen Intervallen uber zwei Monate sonographisch dokumentiert. Die sonographisch feststellbaren Veranderungen unterliegen regelhaften Ablaufen. Die Veranderungen des Ultraschallbildes sind unter Berucksichtigung theoretischer Ultraschallphysik durch die feingeweblichen Veranderungen erklarbar. Hamatomentwicklung und fibrose Vernarbung konnen sonographisch verfolgt werden. Die Sonographie ist sowohl eine wertvolle Methode in der Diagnostik der partiellen und totalen Sehnenruptur als auch unter Vor…