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Biomedical subjects

G M Good

Publications and source records attributed to G M Good.

4 recordsLinked to original sources
PubMed1999

Otoendoscopy for improved pediatric cholesteatoma removal.

Our objective was to determine the usefulness of intraoperative rigid endoscopy in detecting incompletely removed cholesteatomas, and to learn whether "second-look" procedures are still needed in children. We used 30 degrees, 2.7-mm endoscopes to evaluate the middle ears of 14 children (29 procedures) with cholesteatomas once all visible disease had been removed under the operating microscope. If residual cholesteatoma was seen, removal continued until all disease visualized with the endoscope was removed. If the cholesteatoma was not removed intact, planned exploratory surgery was performed. The rigid endoscope detected incompletely removed cholesteatomas at surgery in 7 of the 29 cases (24%). In 2 of the 11 cases (18%) judged free of cholesteatoma by both otomicroscopy and otoendoscopy, residual disease was found at planned exploratory procedures. While otoendoscopy is clearly useful in detecting incompletely removed cholesteatoma, a substantial rate of residual disease following "complete" removal suggests the continued need for planned exploratory procedures.

Adolescent↗
PubMed1998

Method for removing endobronchial beads.

The development of rigid bronchoscopes, Hopkins rod telescopes, and optical forceps has increased the efficacy and safety of removing endobronchial foreign bodies. These instruments have become the method of choice for managing the majority of foreign bodies. Spherical foreign bodies, such as beads, remain difficult to manage. Securing the foreign body by passing a Fogarty catheter through the lumen, inflating the balloon, and trapping the foreign body between the balloon and the bronchoscope allows controlled removal.

Bronchi↗
PubMed1995

Stump pressure, electroencephalographic changes, and the contralateral carotid artery: another look at selective shunting.

BACKGROUND: Selective shunting during carotid endarterectomy is associated with the lowest operative stroke rate; therefore, patient selection for carotid shunting is critical. Electroencephalography (EEG) can detect ischemic brain cell dysfunction before irreversible injury. The carotid stump back pressure (CSP) has been inconsistent in determining the need for shunting, and contralateral carotid disease has had a variable impact. The purpose of this study was to evaluate CSP and operative EEG changes, and to determine the effect of contralateral carotid artery disease on determining the need for carotid shunting. METHODS: In 140 consecutive carotid procedures, operative EEG and CSP were monitored, and contralateral carotid disease was documented. The carotid stump pressure/mean arterial pressure index (CSP/MAP) was also calculated to determine if this was a better indicator of the need for shunting than the CSP alone. RESULTS: There was a 58% incidence of EEG changes when the CSP was < or = 25 mm Hg, 32% with a CSP of 26 to 50 mm Hg, and 4% with a CSP > 50 mm Hg. There was a 43% incidence of EEG changes and lower CSP among patients with a contralateral occlusion, both of which were significantly different from patients with a patent contralateral carotid artery. Three patients with CSP > 50 mm Hg had EEG changes, but none had a contralateral occlusion. Two patients had permanent neurologic deficits, and 2 had transient deficits. Excluding combined procedures, operative stroke rate was 0.8%. CONCLUSIONS: A CSP of < 50 mm Hg achieved a sensitivity of 89% in patients who developed ischemic EEG changes during carotid clamping, and a pressure > 50 mm Hg had a negative predictive value of 96%. However, a CSP of < 50 mm Hg had a positive predictive value of only 36%. Neither the addition of the status of the contralateral carotid artery or the calculation of the CSP/MAP improved the sensitivity of the CSP in determining the need for shunting. Operative EEG monitoring remains the most sensitive guide to carotid shunting in patients undergoing carotid endarterectomy under general anesthesia.

Adult↗