Telehealth: A Primer

Rescue announces they are transporting a stroke patient and upon arrival, the patient has a dense left-sided hemiplegia and is unable to speak. The patient appears to be a superb candidate for chemical thrombectomy and we have a three-hour envelope from onset to treat with relative safety. I struggle to communicate with the patient as best as I can, in frustration, I look up and see three nurses gathered around the gurney intently working with their smartphones. My initial reaction is to admonish the staff for not helping when I quickly realize that they are working hard to find the patient’s family so we can define the timeline, risks, and receive consent to provide treatment to the patient. They are successful at social networking and the patient’s brother arrives shortly thereafter. He constructs the timeline, reviews risks, obtains consent and the patient is thrombolysed. An hour later, the patient is talking and shows no weakness.

The above event stands as a career-changing event for me. Until then, I had worked for 30+ years in the Emergency Department (ED) only rarely getting help from the outside world. This was the first time the internet intervened providing virtual healthcare. We have seen the evolution of practice aids and recordkeeping that substantially change the way healthcare is delivered. Now healthcare providers are challenged with virtual delivery of healthcare in the rapidly expanding area of telehealth.

What is telehealth?

Telehealth, as defined by the Health Resources Services Administration (HRSA, 2014), is the use of electronic information and telecommunications technologies to support long distance clinical health care, patient and professional health-related education, public health and health administration. These technologies include video conferencing, the internet, store and forward imaging, streaming media, and terrestrial and wireless communications.

HRSA differentiates telehealth from telemedicine. Telehealth refers to a broader scope of remote healthcare services such as non-clinical services, provider training, administrative meetings, and continuing medical education. Telemedicine is the provision of remote clinical services. These definitions are presented only to assist in an attempted differentiation and are often used interchangeably. For the purposes of this article, we will use the term telehealth.

Aspects of telehealth

Telehealth can be divided into four broad categories: interactive video conferencing, store and forward, patient monitoring, and mobile telehealth (mHealth).

Interactive video conferencing allows patients and healthcare providers to see and hear each other in real-time, whether they are across the street or on the other side of the world. Many sending stations are now equipped with stethoscopes, otoscopes, ultrasound, ophthalmoscopes, and other peripherals which can increase the richness of data and make decision-making more certain. This category of telehealth also includes professional to professional consultation (e.g., the pathologist that needs help with a puzzling frozen section). This can happen in real time and significantly affect the course of a clinical interaction. The video conferencing arm of telehealth has two subdivisions: scheduled virtual visits and the on-demand virtual visit. A scheduled virtual visit is just that, a scheduled visit between provider and a patient known to the provider. In an on-demand virtual visit it is rare for the provider to know the patient. On-demand telehealth is currently associated with a high level of entrepreneurial fervor.

An unexpected video conferencing service is the advent of the Tele-ICU. Small hospitals, largely unable to maintain a full retinue of intensivists, can take their ICU online to an intensivist staffed virtual ICU. The ICU monitors in both the hospital ICU and in the virtual ICU have the same readings. Intensivists can direct nursing and physicians through problems or arrange for transfer to an ICU with 24/7 staff intensivists.

Another video conferencing service is teleneurology which facilitates access to the neurology or neurosurgery expertise. This platform allows neurologists at a distant specialty hospital to interview patients and staff and help make decisions as to whether thrombolytic or neurosurgical expertise might improve outcomes. In this instance, for patients requiring neurosurgical expertise not available at the consulting hospital, the patient can be transferred for rapid stroke reversal in the OR.

The only real difference between interactive video conferencing and store and forward is that the latter is asynchronous. The provider and the patient are not interactive in real-time, but rather send a series of verbal and or video messages to each other. Clinicians may request consults that are nonurgent. This professional to professional consultative service has been particularly helpful in radiology, dentistry, dermatology, ophthalmology (diabetic retinopathy) and pathology.

Patient monitoring technology (generally asynchronous) can now go home with the patient. For many years now, nurses have been following patients at discharge from hospitals. The most common activity is monitoring for exacerbation of congestive heart failure after discharge. This activity can shorten hospital stay and head off exacerbations before they become critical. Currently, these activities are somewhat sporadic, although some have moved into continuous monitoring, such as the current day Holter cardiac monitor. Noninvasive, comfortably worn sensors can transmit to Internet capable phones and the data is sent to processing centers where either computers or personnel monitor for concerning changes.

Finally, there is mHealth (mobile telehealth) which is simply all of the above originating from mobile technology. It may be synchronous or asynchronous, but includes the essential video conferencing component. It just keeps on getting easier!

The best way to think about telehealth is to compare it to a familiar healthcare tool: the stethoscope. The heart sound was the most prominent sound emanating from the body heard by early physicians but simply holding the ear to the patient’s chest was problematic. So, the first stethoscope was a simple bamboo tube. But the tube revealed sounds that were difficult to hear and a diaphragm was added. And so on. So too for telehealth: the telephone was good but missed the unheard, visual elements of an interview. A picture is worth a thousand words and, by personal experience, a video raises that to the sixth power. Thus, telehealth is a new tool—not new medicine. It empowers both provider and patient to explore new dimensions of healthcare delivery. It has now been shown that Telehealth is effective in: (1) remote patient monitoring, (2) surveillance of chronic illness and (3) elements of behavioral health (Agency for Healthcare Research & Quality, 2016).

Telehealth is a fit in the drive to value-based healthcare

Telehealth addresses all the elements of the triple aim (Berwick et al., 2008) as it has the opportunity to (1) improve the individual’s experience of care, (2) improve the health of populations (by improving access), and (3) reducing the per capita costs of care. Berwick’s “triple aim” is an efficient restatement of the “Six Aims for the HealthCare System” put forth by the Institute of Medicine’s 2001 landmark publication: Crossing the Quality Chasm. (Institute of Medicine, 2001). Reviewing the IOM list in the context of Telehealth is instructive: