Prevention of cerebrospinal fluid rhinorrhea in translabyrinthine surgery.
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Cerebellar Neoplasms↗
Biomedical subjects
L Ekvall
Publications and source records attributed to L Ekvall.
Hearing gain calculations after stapedectomy.
A comparison of the postoperative air-bone gaps to pre- and postoperative bone condition (BC) was made in two groups of patients with otosclerosis, 18 cases with poor preoperative BC thresholds and 15 cases with good preop, thresholds. The gaps to the postoperative BC showed less variation than the gaps to the preop. BC threshold, the postop. BC may therefore serve as a more stable and natural reference when calculating a postoperative air--bone gap.
Audiometry↗
Multidirectional tomography in reconstructive middle ear surgery.
The tomographic demonstration of essential structural details before reconstructive middle ear surgery with osseous auto- and homografts is described, and the preoperative information requirements are briefly discussed. The tomographic appearance of the different types of reconstruction is presented. The halfaxial and true lateral projections are to be preferred, if necessary complemented by the axial-pyramidal projection. Tomography may disclose obvious morphologic causes of absence of postoperative hearing improvement or secondary hearing impairment.
Ear Ossicles↗
Survival of the cortical bone columella in ear surgery.
Twenty-six partial and twenty-four ossicular replacement grafts were removed from patients because of hearing problems, cholesteatoma or re-perforation. The ossicles had been inserted in the middle ear between 7 and 121 months. The removed grafts were analysed with histology, enzyme histochemistry and, in 5 cases, tetracycline labelling. The results demonstrated that the majority (78%) of the grafts consisted at the time of removal of a mixture of living and dead bone. In 13% of the cases there were no indications of bone survival, while 9% of the removed grafts were found to consist of mainly vital bone. It is concluded that the fate of ossicular replacement grafts resembles that previously described for cortical bone grafts used in orthopaedic surgery.
Bone Transplantation↗