1. Real Time Teleconsultation (Synchronous)
- Real time teleconsultation uses advanced telecommunication technology to exchange information and involves the use of audiovisual technology allowing individuals to communicate live (or synchronously) over a videoconference link.
- Real time services require, at a minimum, video cameras, a sound system, computer displays, and a secure high speed internet connection to transmit data between sites (Deshpande et al., 2008).
- Real time teleconsultation encompasses computer technologies using narrow and high bandwidths for specific types of transmission, full motion video, broadcast video, compressed video and virtual reality (Myers, 2003).
- Real-time services rely on the availability of dedicated videoconferencing facilities, which generally are restricted to institutions.
Example of Real-Time Interaction: Tele-Psychiatry
· A patient is in the video conferencing room of a rural community telehealth site.
· At the same time the patient’s psychiatrist is in the videoconferencing room at the specialist centre for psychiatry.
· Live interactive consultation takes place between the patient and the psychiatrist.
2. Store & Forward Teleconsultation (Asynchronous)
- Asynchronous teleconsultation is often referred to as store and forward, and is the transmission of data without the need for live interaction between individuals. It involves the collection of digital samples of health information (e.x. electrocardiograms, spirometry results, radiological images) at one location and their transmission to a health professional in another location for review.
- Technology can be any device capable of capturing a digital sample, storing it, downloading it, and transmitting it to a remote site. Equipment used includes computers and laptops, computer files, scanners, digital cameras, iPods, audio files, or text files of a patient’s medical history. The internet provides the ability to transmit large files securely, quickly, and inexpensively to almost any location.
- Asynchronous teleconsultation has led to shorter wait times, fewer unnecessary referrals, higher levels of patient care, and patient and provider satisfaction in remote areas that lack health care professionals (Deshpande et al., 2008).
Example of Store & Forward Interaction: Tele-Radiology - In a rural community telehealth site, a patient’s x-ray is taken, scanned and captured as an electronic file.
- The file, and any accompanying medical notes, is sent electronically to the physician in the tertiary care telehealth site.
- The radiologist in the tertiary care site opens the file, reviews the x-ray and notes in order to confirm and/or determine a diagnosis.
- The file and accompanying notes are then returned to the rural telehealth site.
- The patient is informed of diagnosis without having to meet the radiologist.
Example of Combination of a Real-Time & a Store and Forward
Interaction:Tele-Dermatology: In a rural community telehealth site, a patient is diagnosed with a skin condition by a dermatologist located in a remote specialist centre using real-time interactive consultation and use of a camera. Following one week of treatment, the patient’s skin condition has improved, and a staff member takes a new photographic image.
The photographic image is forwarded to the dermatologist in the remote location for further follow-up and review.