PubMed Health⌕ Search

Biomedical subjects

C M Luetje

Publications and source records attributed to C M Luetje.

At least 19 recordsLinked to original sources
PubMed1992

Feasibility of multichannel human cochlear nucleus stimulation.

Bipolar electrical stimulation of the brainstem cochlear nucleus (CN) following acoustic tumor removal in an only-hearing ear can provide beneficial hearing. However, the benefits of multichannel stimulation have yet to be defined. Following removal of a second acoustic tumor in a patient with neurofibromatosis 2, a Nucleus mini-22 channel implant device was inserted with the electrode array tip from the foramen of Luschka cephalad along the root entry zone of the eighth nerve, secured by a single suture superficially in the brain stem. Initial stimulation on the sixth postoperative day indicated that electrodes 18 to 22 were capable of CN stimulation without seventh nerve stimulation. Presumed electrode migration precluded further CN stimulation 1 month later. This report illustrates the feasibility of brainstem CN stimulation with an existing multichannel system.

Adult↗
PubMed1992

Hearing results following posterior semicircular canal injury during antesigmoid retrolabyrinthine selective vestibular nerve section.

The disastrous hearing results in six patients whose posterior semicircular canal was entered during antesigmoid mastoid craniotomy for retrolabyrinthine selective vestibular nerve section were reviewed. The injury occurred during skeletonization of the posterior semicircular canal to maximize intracranial exposure of the eighth nerve. All patients had Meniere's disease. Four patients were deafened, and in two, there was either no serviceable hearing or severe hearing impairment in the operated ear. Caution is urged in posterior semicircular canal labyrinthotomy for vertigo and attempted hearing preservation if a patient has symptoms of endolymphatic hydrops.

Craniotomy↗
PubMed1991

The benefits of VII-VII neuroanastomosis in acoustic tumor surgery.

Division of the seventh nerve during acoustic tumor removal cannot always be avoided. Direct VII-VII neuroanastomosis is superior to any other neuroanastomosis for facial reanimation. Rerouting of the seventh nerve from the mastoid and neuroanastomosis can be accomplished primarily at the initial surgery. This study reviews 19 patients with a follow-up of greater than 18 months who underwent the procedure at the time of tumor removal because of seventh nerve involvement by tumor, intentional sacrifice or, rarely, unintentional division. A House class IV result or better, without the twelfth nerve neurological deficit produced by a VII-XII neuroanastomosis, was achieved in 16 of 19 patients. Although the technique is not new, surgeons unprepared to manage this surgical complication at primary tumor removal should either learn the technique, work with an associate who can do so, or be prepared to call in someone else to do it.

Adipose Tissue↗
PubMed1991

Recurrent acoustic tumor after a suboccipital removal.

Surgery for acoustic tumors has several priorities. First and foremost is the preservation of life with the total removal of the tumor; second is the preservation of the facial nerve; and last, when applicable, is the preservation of hearing. During the suboccipital (retrosigmoid) removal of a tumor, the surgeon unknowingly may leave tumor remnants leading to regrowth. We present five cases of recurrent acoustic tumors after a suboccipital removal. Inadequate drilling exposure of the internal auditory canal was the probable direct cause for tumor recurrence. A translabyrinthine removal is the best approach for total exposure of the entire internal auditory canal. The consequences of small tumor remnants will be discussed as well as their clinical relevance. Current radiological imaging and surgical techniques that avoid residual tumor will be presented.

Adult↗
PubMed1991

Facial reanimation.

Explore the source record for details and available documents.

Anastomosis, Surgical↗
PubMed1989

Theoretical and practical implications for plasmapheresis in autoimmune inner ear disease.

Immune-mediated inner ear disease, by convention called autoimmune inner ear disease (AIED), has established clinical profile guidelines for diagnosis. Treatment consists of steroid and/or cytotoxic drug immunosuppression. The role of plasmapheresis (PMP) in the treatment of AIED has not been defined. Lack of a precise serological marker prevents accurate immunological understanding. Definition is, of course, difficult in a disease whose natural history is not well delineated. Successful use of PMP in one steroid and cytotoxic drug intolerant patient with AIED led to its use in a total of eight patients. The rationale for PMP was based on its known effectiveness in other autoimmune diseases and thus, its potential use in AIED. Improved auditory function occurred in 6 of the 8 patients, 3 of whom have been followed for over 3 years. Three of the six no longer require immunosuppressant medication. PMP can be used as an alternative or adjunctive therapy in AIED. These preliminary results suggest PMP can stabilize or improve auditory and vestibular symptoms in selected patients. Its use as a first line therapy followed by cytotoxic immunosuppressants bears consideration.

Adult↗
PubMed1988

A critical comparison of results of endolymphatic subarachnoid shunt and endolymphatic sac incision operations.

Detailed information was obtained by questionnaires, office visits, chart reviews, and telephone calls from 171 of 179 consecutive patients who underwent endolymphatic sac surgery between 1976 and 1986. A comparison of surgical results was made. For patients followed more than 24 months, complete control of vertigo was obtained in 40 of 68 patients (59%) by endolymphatic subarachnoid shunt and in 27 of 60 patients (45%) who underwent a variety of sac incision operations. This difference achieved borderline statistical significance (p less than or equal to 0.057). Profound or total hearing loss occurred in 8 patients (4.3%), 6 of whom had sac mastoid procedures. The percentage of patients indicating an absence of disability improved in both groups dramatically following surgery.

Persons with Disabilities↗
PubMed1988

Standardization in reporting results of acoustic tumor surgery.

The number of surgical reports from acoustic tumor removal has increased as the competency level of surgeons has increased. Proposed for acceptance as standards in reporting are 1) maximum diameter of the tumor as judged by computed tomography or magnetic resonance imaging in millimeters or centimeters, 2) presence or absence of IV ventricle displacement, indentation, or deformation, 3) preoperative and postoperative speech audiometry, 4) specific nomenclature as to the anatomic surgical approach with total or partial removals, 5) specific description of anatomic preservation of the facial nerve, specifying immediate postoperative function, and 6) use of the John House facial nerve function grading system. These guidelines were adopted by the authors for standardizing reporting results in 110 consecutive operations for acoustic tumors performed between 1976 and 1986.

Aged↗
PubMed1979

Extramastoid cholesteatoma in chronic ear disease: a report of two cases.

Two patients who had undergone radical mastoid surgery developed an isolated focus of cholesteatoma embedded in the sternomastoid muscle just below the mastoid tip. In one instance the etiology was felt to be iatrogenic implantation of squamous epithelium. In the second, unrecognized extension from the mastoid tip probably occurred. The purpose of this paper is to describe and discuss in detail the clinical and pathological features of these two cases.

Adolescent↗