Biomedical subjects

S Yetiser

Publications and source records attributed to S Yetiser.

6 recordsLinked to original sources

PubMed1998

High-velocity gunshot wounds to the head and neck: a review of wound ballistics.

Patients who sustain gunshot injuries to the head and neck face heavy tissue damage and eventually life-threatening conditions. A very significant factor that determines the degree of injury is the course and extent of the missile track. The missile track is well correlated with bullet structure, size, and velocity, which have distinct features in civilian and military firearm injuries. The missile entrance or exist wound may be out of sight in some injuries, and often it is difficult to predict the severity of the injury in the chaotic circumstances of the battlefield. We studied the wound ballistics in five soldiers who suffered penetrating cranial and cervical firearm injuries.

Adult↗

PubMed1997

Patient selection and surgical results in obstructive sleep apnea.

In recent years, therapeutic methods have been effective in the management of snoring and sleep apnea. Successful results have been possible through conservative and surgical approaches when the nature and site of obstruction is ascertained by careful investigation. Sagittal magnetic resonance imaging (MRI) of the upper respiratory tract has been the most valuable diagnostic tool in patients with obstructive sleep apnea. This has made it possible to measure the dimensions and distance of the hard and soft palate and tongue base to the posterior pharyngeal wall. Surgery is only indicated when a site of obstruction can be completely determined. In this study, surgical approaches and results obtained in 50 patients after surgery for sleep apnea are presented. Uvulopalatopharyngoplasty (UPPP) had a higher success rate in patients with obstruction at the level of the soft palate, but this rate decreased when it was associated with hypopharyngeal obstruction or when there was hypopharyngeal obstruction alone. UPPP was found to be beneficial in patients with central apnea. Nasal pathologies also played an important role in sleep apnea. Better results were obtained when UPPP was performed in patients who were young, not obese and an apnea-hypopnea index was below 40. Some unusual pathologies included lingual tonsil hypertrophy in the adult, sublingual dermoid cysts and angioma of soft palate and were found to be the cause of OSA. After surgical excision of these pathologies, apneic periods disappeared.

Adult↗

PubMed1997

Elongated styloid process: diagnostic problems related to symptomatology.

A certain number of patients with elongated styloid process may not have the classic cervicofacial complaints which were originally described by W. Eagle in 1937. Some of those cases who have radiologic evidence of elongated styloid process are symptom free and can be accepted as normal anatomical variants. On the other hand, some of those symptomatic cases may present uncommon neurologic signs and can be misdiagnosed as neurologic or infectious disease. Sometimes, the radiologic presence of an elongated process may cause the clinician to miss another pathology. Therefore, it is essential for the clinician to be aware of the clinical variants with different symptomatology or to particularly seek the origin of the pain in the head and neck before reaching a conclusion, since the only effective treatment in symptomatic cases is the surgical shortening of the process. We report five patients with elongated processes. Problems related to an elongated styloid process with different symptomatology are discussed and the associated literature is reviewed.

Adult↗

PubMed1997

Migraine-related vestibulopathy.

Migraine has been associated with specific vestibular disorders, including benign paroxysmal vertigo of childhood and benign recurrent vertigo in adults. Migraine may also play a role in chronic nonspecific vestibulopathy. Because scant data exist that describe the clinical findings and vestibular function abnormalities in suspected migraine-related vestibulopathy, we reviewed the history, physical examination, vestibular tests (electronystagmography, rotational chair, posturography), and response to treatment of 100 patients with diagnoses of migraine-related vestibulopathy. Dominant clinical features included chronic movement-associated dysequilibrium, unsteadiness, space and motion discomfort, and occasionally, episodic vertigo as an aura prior to headache, or true vertigo without headache. Common vestibular test abnormalities included a directional preponderance on rotational testing, unilateral reduced caloric responsiveness, and vestibular system dysfunction patterns on posturography. Treatment was usually directed at the underlying migraine condition by identifying and avoiding dietary triggers and prescribing prophylactic anti-migraine medications. Symptomatic relief was also provided using anti-motion sickness medications, vestibular rehabilitation, and pharmacotherapy directed at any associated anxiety or panic disorder.

Adolescent↗

PubMed1996

Localizing retrocochlear hearing loss.

PURPOSE: The origin of acute/sudden hearing loss is multifactorial. The association of vestibular symptoms does not necessarily isolate the pathologic condition to the inner ear. The audiogram provides a screen for differentiating conductive from sensorineural loss but often fails to provide more localizing information. METHODS: Three unusual patients with a variety of retrocochlear presentations of hearing loss are presented. Along with conventional auditory brainstem response (ABR) testing, newer auditory tests, including otoacoustic emissions and three-dimensional ABR analysis, can facilitate site-of-lesion testing. Magnetic resonance imaging (MRI) also provides graphic documentation for sources of retrocochlear hearing loss. RESULTS: One patient had gamma-knife treatment of an arteriovenous malformation, incurring a localised lesion to the inferior colliculus contralateral to the side of hearing loss. This effectively eliminated wave V, as confirmed by three-dimensional ABR analysis. A second patient with human immunodeficiency virus developed sudden complete hearing loss with retained otoacoustic emissions, confirming a retrocochlear lesion. A third patient with acute otitis media with sudden hearing loss and vertigo had an abnormal ABR and "mass lesion" on MRI. Hearing subsequently returned to normal, as did a repeated scan. CONCLUSIONS: The unique aspects of each case of retrocochlear hearing loss and the applied auditory electrophysiologic tests are reviewed.

Adult↗

PubMed1993

Concussive blast-type aural trauma, eardrum perforations, and their effects on hearing levels: an update on military experience in Izmir, Turkey.

Thirty-two military personnel, exposed to blast injury in the last 15 months, have been investigated according to type of eardrum perforation and hearing loss in this retrospective study. It has been concluded that tympanic membrane perforations and hearing loss due to blast effect have individual patterns. Hearing loss due to trauma is not because of pressure environment alone. Final outcomes have justified the previous recommendations about ear protection in military staff, particularly in those who are working with explosive materials. Ear muffs with ear phones are appropriate, providing ear protection as well as hearing gain.

Adult↗