Why isolate theatre suites?
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Facility Design and Construction↗
Biomedical subjects
C Heneghan
Publications and source records attributed to C Heneghan.
Morbidity after outpatient anaesthesia. A comparison of two techniques of endotracheal anaesthesia for dental surgery.
A comparison was made of two anaesthetic techniques for outpatient dental surgery; the basis for comparison was symptomatic morbidity. One group of patients was managed with spontaneous breathing of nitrous oxide, oxygen and halothane; the other was ventilated mechanically, and received fentanyl and alcuronium. The latter anaesthetic was associated with a significantly higher incidence of morbidity on the day of operation, but not subsequently. The incidence of dysrhythmias was not significantly different. The comfort and safety of patients are discussed in relation to the choice of anaesthetic.
Adolescent↗
Investigating routes to chaos in the guinea-pig cochlea using the continuous wavelet transform and the short-time Fourier transform.
The continuous wavelet transform (CWT) and the short-time Fourier transform (STFT) were used to analyze the time course of cellular motion in the guinea pig inner ear. The velocity responses of individual outer hair cells and Hensen's cells to amplitude modulated (AM) acoustical signals applied to the ear canal displayed characteristics typical of nonlinear systems, such as the generation of spectral components at harmonics of the carrier frequency. Nonlinear effects were particularly pronounced at the highest stimulus levels, where half-harmonic (and sometimes quarter-harmonic) components were also seen. The generation of these components was consistent with the behavior of a dynamical system entering chaos via a period-doubling route. A negative-stiffness Duffing oscillator model yielded period-doubling behavior similar to that of the experimental data. We compared the effectiveness of the CWT and the STFT for analyzing the responses to AM stimuli. The CWT (calculated using a high-Q Morlet-wavelet basis) and the STFT were both useful for identifying the various spectral components present in the AM velocity response of the cell. The high-Q Morlet wavelet CWT was particularly effective in distinguishing the lowest frequency components present in the response, since its frequency resolution is appreciably better than the STFT at low frequencies. Octave-band-based CWTs (using low-Q Morlet, Meyer, and Daubechies 4-tap wavelets) were largely ineffective in analyzing these signals, inasmuch as the frequency spacing between neighboring spectral components was far less than one octave.
Animals↗
Telemedicine applications in otolaryngology.
Under suitable technical and clinical conditions, remote interactive fiber-optic NPL can be used to evaluate a range of commonly occurring pathologies with a high degree of reliability. A clinical protocol appropriate for interactive and store-and-forward fiber-optic NPL was proposed for further evaluation. Additional applications of telemedicine in otolaryngology were outlined, including otoscopy, intra-oral examination, and evaluation of external facial pathology. We envisage tele-otolaryngology taking place in a variety of ways: Interactions between rural-based PCPs and specialists (routine evaluation of hoarseness, dysphagia), using store-and-forward techniques. Consults from emergency medicine physicians at a general service hospital to a specialist (laryngeal trauma, acute peritonsillar abscess, TM perforations) using interactive means. Case discussions between specialist and sub-specialist using a combination of store-and-forward and interactive technologies. Potentially, there are at least three significant benefits from widespread acceptance of telemedicine in the field of otolaryngology, or indeed in any of the medical specialties: Saved lives and reduced medical costs due to early detection of serious pathology (in this case, head and neck cancers). Reduced unnecessary referrals to specialists, and consequent savings to the patient and health-care insurer, accompanied by more efficient usage of specialist time. Enhanced level of medical education and interaction, as the link between the referring and consulting physician is more immediate and direct [27]. For these reasons, combined with the high number of visits at the primary-care level related to issues in otolaryngology-head and neck surgery, tele-otolaryngology is poised to be a leading telemedicine application within the next few years.
Computer Communication Networks↗