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At least 235 records · Page 13Linked to original sources
PubMed2002

[Stereotactic telepresence in otorhinolaryngologic surgery].

BACKGROUND: Intraoperative three-dimensional (3D) navigation systems determine spatial positions and visualize them in radiological data sets. Usually, data from 3-D computed tomography (CT) are used. We have successfully implemented "augmented reality" in routine clinical practice by superimposing positional data and guiding and ancillary structures on the live endoscopic video of the operating site. Thus, optimal access paths and anatomical structures such as the a. carotis interna or the n. opticus can be displayed. METHODS AND RESULTS: With modern telecommunication, any two locations can be connected for intraoperative consultations with a remote expert, and 3D navigation is an ideal complement. We have successfully tested telephone, ISDN, Ethernet, and ATM technology intraoperatively and find that the ARTMA system provides well-developed technology. CONCLUSIONS: Stereotactic telepresence can provide essential aid in difficult surgical procedures, and the ARTMA Knowledge-Guided Surgery system will contribute further to the optimization of computer-assisted surgery.

Endoscopes↗
PubMed1996

An application of telemedicine technology for otorhinolaryngology diagnosis.

Applications of interactive video communications for providing remote telemedicine consultations are under study. Most of these applications use "off the shelf" medical peripheral devices that are not specifically designed for telemedicine examinations. This study reports a field trial of the telemedicine instrument pack (TIP), a small self-contained unit under development by the National Aeronautics and Space Administration for use in spaceflight. Patients with otorhinolaryngology problems were selected from a primary care practice and examined with the TIP by a technician under the direction of a remote consultant. The equipment proved adequate for examination of the posterior nose, hypopharynx, and larynx. Examinations of the ear and oropharynx with the TIP were not optimal, suggesting a need for further modifications of this prototype unit.

Adult↗
PubMedDate not supplied

[Diagnostic image management and communication systems: experience at the University of Pisa].

Our work was aimed at implementing and validating a system for the acquisition, local management and remote transmission of diagnostic images. Integration of imaging equipment was performed in each of the two sites (5 km apart) in which the Department of Radiology of the University of Pisa is divided. Teleradiology was carried out using 64 Kbit/s lines as well as a 140 Mbit/s Metropolitan Area Network compliant with the Distributed Queue Dual Bus standard. Application domains included remote expert consultation and teleprocessing of diagnostic images. Remote expert consultation was performed in particular by using the 34 Mbit/s interconnection with the Metropolitan Area Network of Florence. Remote processing of diagnostic images using the high speed link allowed the cooperative work with scientific institutions in a field often limited by the complexity of image transfer and by the lack of a timely feed-back concerning the clinical value of processed images. Advanced processing of diagnostic images was performed in the field of stereographic display of CT and MR data sets. Moreover, experience was gained in the visualization, on a single composite image, of the multiparametric data obtained by means of different MR sequences (T1, Spin Density, T2), thus allowing to summarize, by using false colors, different tissue contrast information.

Computer Communication Networks↗
PubMed1999

Performance and function of a high-speed multiple star topology image management system at Mayo Clinic Scottsdale.

Mayo Clinic Scottsdale (MCS) is a busy outpatient facility (150,000 examinations per year) connected via asynchronous transfer mode (ATM; OC-3 155 MB/s) to a new Mayo Clinic Hospital (178 beds) located more than 12 miles distant. A primary care facility staffed by radiology lies roughly halfway between the hospital and clinic connected to both. Installed at each of the three locations is a high-speed star topology image network providing direct fiber connection (160 MB/s) from the local image storage unit (ISU) to the local radiology and clinical workstations. The clinic has 22 workstations in its star, the hospital has 13, and the primary care practice has two. In response to Mayo's request for a seamless service among the three locations, the vendor (GE Medical Systems, Milwaukee, WI) provided enhanced connectivity capability in a two-step process. First, a transfer gateway (TGW) was installed, tested, and implemented to provide the needed communication of the examinations generated at the three sites. Any examinations generated at either the hospital or the primary care facility (specified as the remote stars) automatically transfer their images to the ISU at the clinic. Permanent storage (Kodak optical jukebox, Rochester, NY) is only connected to the hub (Clinic) star. Thus, the hub ISU is provided with a copy of all examinations, while the two remote ISUs maintain local exams. Prefetching from the archive is intelligently accomplished during the off hours only to the hub star, thus providing the remote stars with network dependent access to comparison images. Image transfer is possible via remote log-on. The second step was the installation of an image transfer server (ITS) to replace the slower Digital Imaging and Communications in Medicine (DICOM)-based TGW, and a central higher performance database to replace the multiple database environment. This topology provides an enterprise view of the images at the three locations, while maintaining the high-speed performance of the local star connection to what is now called the short-term storage (STS). Performance was measured and 25 chest examinations (17 MB each) transferred in just over 4 minutes. Integration of the radiology information management system (RIMS) was modified to provide location-specific report and examination interfaces, thereby allowing local filtering of the worklist to remote and near real-time consultation, and remote examination monitoring of modalities are addressed with this technologic approach. The installation of the single database ITS environment has occurred for testing prior to implementation.

Arizona↗
PubMed2000

Psychiatric inpatient care planning via telemedicine.

We assessed the costs of psychiatric inpatient care-planning consultations to remote areas using videoconferencing, instead of the conventional face-to-face consultations at a hospital. The data were collected from all wards at the department of psychiatry of Oulu University Hospital over 11 months. A total of 14 videoconferences were conducted with two primary-care centres located 220 km and 160 km from Oulu. During the same period, 20 conventional consultations at the Oulu University Hospital were also assessed. A questionnaire was completed by a total of 124 patients, relatives and health-care personnel; the response rate was about 90%. Of the respondents, 90% were satisfied with the quality of communication afforded by videoconferencing. At a workload of 20 patients per year, the cost of the videoconferences was FM2510 per patient; the cost of the conventional alternative was FM4750 per patient. At 50 care consultations per year, a remote municipality would save about FM117,000.

Attitude of Health Personnel↗
PubMed2001

Minimum acceptable standards for digital compression of a fetal ultrasound video-clip.

If the Internet could be used as a method of transmitting ultrasound images taken in the field quickly and effectively, it would bring tertiary consultation to even extremely remote centres. The aim of the study was to evaluate the maximum degree of compression of fetal ultrasound video-recordings that would not compromise signal quality. A digital fetal ultrasound videorecording of 90 s was produced, resulting in a file size of 512 MByte. The file was compressed to 2, 5 and 10 MByte. The recordings were viewed by a panel of four experienced observers who were blinded to the compression ratio used. Using a simple seven-point scoring system, the observers rated the quality of the clip on 17 items. The maximum compression ratio that was considered clinically acceptable was found to be 1:50-1:100. This produced final file sizes of 5-10 MByte, corresponding to a screen size of 320x240 pixels, running at 15 frames/s. This study expands the possibilities for providing tertiary perinatal services to the wider community.

Female↗
PubMed2000

Recent developments and present status of telepathology.

Telepathology which is the diagnostic work of a pathologist at a distance has been developed to routine application within the last ten years. It can be classified in relation to application, technical solutions, or performance conditions. Diagnostic pathology performance distinguishes primary diagnosis (for example, frozen section statement) from secondary diagnosis (for example, expert consultation) and quality assurance (diagnostic accuracy, continuous education and training). Applications comprise (a) frozen section service; (b) expert consultations; (c) remote control measurements; and (d) education and training. The technical solutions distinguish active (remote control, live imaging) systems from passive (conventional microscope handling, static imaging), and the performance systems with interactive (on-line, live imaging) use from those with passive (offline, static imaging) practice. Intra-operative frozen section service is mainly performed with remote control systems; whereas expert consultations and education/training are commonly based upon Internet connections with static imaging in an off-line mode. The image quality, transfer rates, and screen resolution of active and passive telepathology systems are sufficient for an additional or primary judgment of histological slides and cytological smears. From the technical point of view, remote control telepathology requires a fast transfer and at least near on-line judgement of images, i.e., image acquisition, transfer and presentation can be considered one performance function. Thus, image size, line transfer rate and screen resolution define the practicability of the system. In expert consultation, the pixel resolution of images and natural color presentation are the main factors for diagnostic support, whereas the line transfer rate is of minor importance. These conditions define the technical compartments, especially size and resolution of camera and screen. The performance of commercially available systems has reached a high quality standard. Pathologists can be trained in a short time and use the systems in a routine manner. Several telepathology systems have been implemented in large Institutes of Pathology which serve for frozen section diagnosis in small hospitals located in the local area. In contrast, expert consultation is mainly performed with international connections. There is a remarkable increase of expert consultations by telepathology according to the experiences of the Armed Forces Institute of Pathology or the Department of Pathology, Thoraxklinik, Heidelberg. In expansion of these experiences, a "globalization" of telepathology can be expected. Telepathology can be used to shrink the period necessary for final diagnosis by request for diagnostic assistance to colleagues working in appropriate related time zones. Telepathology is, therefore, not a substitute of conventional diagnostic procedures but a real improvement in the world of pathology.

Europe↗
PubMedDate not supplied

Telemedicine and international disaster response. Medical consultation to Armenia and Russia via a Telemedicine Spacebridge.

UNLABELLED: The Telemedicine Spacebridge, a satellite-mediated, audio-video-fax link between four United States and two Armenian and Russian medical centers, permitted remote American consultants to assist Armenian and Russian physicians in the management of medical problems following the December 1988 earthquake in Armenia and the June 1989 gas explosion near Ufa. METHODS: During 12 weeks of operations, 247 Armenian and Russian and 175 American medical professionals participated in 34 half-day clinical conferences. A total of 209 patients were discussed, requiring expertise in 20 specialty areas. RESULTS: Telemedicine consultations resulted in altered diagnoses for 54, new diagnostic studies for 70, altered diagnostic processes for 47, and modified treatment plans for 47 of 185 Armenian patients presented. Simultaneous participation of several US medical centers was judged beneficial; quality of data transmission was judged excellent. CONCLUSION: These results suggest that interactive consultation by remote specialists can provide valuable assistance to on-site physicians and favorably influence clinical decisions in the aftermath of major disasters.

Armenia↗
PubMedDate not supplied

Telemedicine and international disaster response: medical consultation to Armenia and Russia via a Telemedicine Spacebridge.

UNLABELLED: The Telemedicine Spacebridge, a satellite-mediated, audio-video-fax link between four United States and two Armenian and Russian medical centers, permitted remote American consultants to assist Armenian and Russian physicians in the management of medical problems following the December 1988 earthquake in Armenia and the June 1989 gas explosion near Ufa. METHODS: During 12 weeks of operations, 247 Armenian and Russian and 175 American medical professionals participated in 34 half-day clinical conferences. A total of 209 patients were discussed, requiring expertise in 20 specialty areas. RESULTS: Telemedicine consultations resulted in altered diagnoses for 54, new diagnostic studies for 70, altered diagnostic processes for 47, and modified treatment plans for 47 of 185 Armenian patients presented. Simultaneous participation of several US medical centers was judged beneficial; quality of data transmission was judged excellent. CONCLUSION: These results suggest that interactive consultation by remote specialists can provide valuable assistance to on-site physicians and favorably influence clinical decisions in the aftermath of major disasters.

Aerospace Medicine↗
PubMed2001

[Telecommunications and networks: perspectives and issues].

The transmission of images, audio, video and computed data provides new facilities in medicine. The uses of telemedicine include teleeducation, training, consulting, diagnostic or therapeutic assistance between remote medical teams, or consultation for remote patients without the need of displacement. Network, telemedicine technologies, perspectives for teaching, medical teams and patients, national legislation, current and new ethical problems raising from telemedicine applications are successively reviewed.

Computer Communication Networks↗
PubMedDate not supplied

Expansion of the consultation-liaison psychiatry paradigm at a university medical center: integration of diversified clinical and funding models.

The perspective of the contemporary Consultation-Liason Service (CLS) psychiatrist is increasingly one of consultant to medical and surgical colleagues in models other than inpatient medical and surgical units. Simultaneously, the need for a clinically and educationally robust inpatient CLS persists despite funding pressures. The University of California, Davis Medical Center Department of Psychiatry has made use of creative organizational and financial models to accomplish the inpatient CLS clinical and educational missions in a fiscally responsible manner. In addition, the department has in recent years expanded the delivery of psychiatry consultation-liaison clinical and educational services to other models of care delivery, broadening the role and influence of the CLS. Several of the initiatives described in this paper parallel an overall evolution of the practice of consultation-liaison psychiatry in response to managed care influences and other systems pressures. This consultation-liaison paradigm expansion with diversified sources of funding support facilitates the development of consultation-liaison psychiatry along additional clinical, administrative, research, and educational dimensions. Other university medical centers may consider adaptation of some of the initiatives described here to their institutions.

Academic Medical Centers↗
PubMed2004

Evaluation of a rural telepsychiatry service.

OBJECTIVE: To evaluate a telepsychiatry clinical service to Wagga Wagga in rural New South Wales, comprising a face-to-face interview with a psychiatrist followed by a telepsychiatry interview with a Sydney-based psychiatrist. METHODS: Thirty-one patients were referred to a specialist mood disorder clinic in a rural setting for consultation and assessment. A retrospective evaluation was made to determine the acceptance of the teleconferenced psychiatry and face-to-face psychiatry, as well as the overall patient response. RESULTS: Twenty participants completed all evaluation components. Their results indicated a satisfaction level of 95% with the consultation process as a whole, with 80% happy to use telepsychiatry again and 60% preferring telepsychiatry over travelling to a larger centre for face-to-face consultation. The face-to-face component was satisfactory for 85% of patients while the telepsychiatry component was satisfactory for 72%. CONCLUSIONS: Although face-to-face psychiatry was preferred by this sample, the telepsychiatry component was highly rated and preferred over travel to larger centres for face-to-face consultation, by residents of rural and remote locations. Certain issues are of more concern in telepsychiatry than face-to-face psychiatry, including confidentiality, rapport, explanation and education.

Australia↗
PubMed2004

Shriners Hospitals for Children, Honolulu's experience with telemedicine: program implementation, maintenance, growth, and lessons learned.

Shriners Hospitals for Children, Honolulu Telemedicine Program conducts real-time video consultations with remotes sites in Hawaii, Guam, Saipan, American Samoa, the Federated States of Micronesia, and the Republic of the Marshall Islands. The program began in 1999 and has provided over 240 consultations. This report is a summary of the Shriners Hospitals experience and lessons learned regarding program implementation and maintenance.

Child↗
PubMed1996

[Possibilities of telecommunications in surgery].

In contrast to telesurgery, telepresence involves only the audiovisual dialogue between the local surgeon and a remote expert; the latter, however, is able to actively monitor the operation by giving his judgement and recommendations. Under clinical conditions, telepresence may have the potential to facilitate intraoperative consultation of remote experts or even tele-assistance. Technical requirements consist of a suitable telemanipulation device (remotely controlled camera and indicator) and a high-duty communication system for real-time transmission of the operating site and the control signal. A minimum of 2 Mbyte/s of transmission capacity is recommended.

Computer Systems↗
PubMed2001

Telehealth and the diagnosis and management of cardiac disease.

The financial and personal burden of chronic cardiac disease is high. Costs are likely to increase over the next few decades. Promising applications of telehealth have appeared in the diagnosis and management of cardiac disease and there are indications that telehealth services can improve the management of chronic cardiac disease as well as extend services to remote and rural populations. Telehealth has been applied to the capture of symptoms of cardiac disease with electrocardiography and echocardiography, to the management and rehabilitation of recently discharged patients, and in peer-to-peer consultation where remote expertise can facilitate diagnosis. Telehealth promises cost reductions in service delivery, although there is a need for properly controlled cost-effectiveness trials to underpin telehealth with a firm evidence base.

Chronic Disease↗
PubMed1996

Vestibular telemedicine and rehabilitation. Applications for virtual reality.

This paper will discuss the use of Virtual Reality (VR) technologies in the rehabilitation of patients with vestibular disorders and in the provision of remote medical consultations for those patients. Patients with a vestibular problem are very common (vertigo is the second most common neurological complaint after headache) and yet there are very few vestibular neurotologists: specialists in their diagnosis and treatment. New treatments for various disorders causing vertigo now exist. This means that appropriate diagnosis can significantly improve patients' well-being. Remote medical diagnosis and treatment facilities could make the few vestibular disorder specialists much more available to patients. An analysis of the technological and economic factors influencing the provision of this service is necessary. The main long term effect of many vestibular disorders is damage to the sensing apparatus of the inner ear. The damage can lead to inappropriate interaction between visually driven orientation sensing and sensing of orientation by the inner ear. The consequence for the patient is vertigo (a sensation of turning), motion sickness and imbalance. Current rehabilitation efforts are intended to drive the nervous system to adapt to the disordered vestibular input. Adaptation appears to occur slowly in many subjects, even those within rehabilitation programs. An appropriately designed VR experience could greatly increase the rate of adaptation in these patients.

Humans↗
PubMed2002

A retrospective evaluation of the development of a telemedicine network in a military setting.

This was a retrospective evaluation of the first 30 months of a new telemedicine network in TRICARE Region Nine. In 1997, the region initiated a telemedicine network with a hub facility at Naval Medical Center, San Diego, providing specialty consultations for remote military treatment facilities in southern California. The region's Internet site, the Referral Management System, was used to schedule and record telemedicine activity, totaling 1,364 cases during the first 30 months of network operation. The rate of telemedicine use increased with the "age" (duration of operation) of both the entire network and of systems at each of five military treatment facilities. The ear/nose/throat specialty accounted for more than 90% of telemedicine activity. Preliminary data indicated that consultations had substantial clinical impact, with 49% of sessions resulting in changed diagnoses. Evaluating telemedicine use in a military setting ashore may guide similar applications for ships at sea.

Adolescent↗