Hd. Banta et H. Vondeling, STRATEGIES FOR SUCCESSFUL EVALUATION AND POLICY-MAKING TOWARD HEALTH-CARE TECHNOLOGY ON THE MOVE - THE CASE OF MEDICAL LASERS, Social science & medicine, 38(12), 1994, pp. 1663-1674
Evaluating new health care technology that is rapidly diffusing is one
of the greatest challenges to researchers and policy-makers. If no ev
aluation is done until the technology is mature, evaluation Will not i
nfluence processes of diffusion. If evaluation is done early, it may b
e irrelevant when it is completed, because of developments in the tech
nology and changing indications for its use. Nonetheless, early evalua
tion seems to be the only strategy possible to improve the integration
of evaluation and diffusion. These difficulties are illustrated by th
e case of lasers. Lasers are diffusing relatively rapidly into health
care, and yet few laser applications have been well-evaluated. Looking
back over the past 20 years or so, only one public body, the National
Eye Institute of the U.S. National Institutes of Health (NIH) seems t
o have tried to address the problem of laser evaluation. In the case o
f the Eye Institute, it has consistently identified new technologies f
or treatment of eye conditions and has mounted well-designed prospecti
ve evaluations aimed at influencing clinical practice. However, these
evaluations have not been integrated with public policy-making, and th
erefore their influence has been relatively slow to develop. In recent
years, concerns about technology have brought more active attempts to
develop public policies to affect diffusion. Excimer laser treatment
of coronary artery disease, especially as dealt with in the Netherland
s, illustrates how a strategy can be developed. Regulation has allowed
diffusion to be constrained while evaluation is carried out. Results
of the evaluation will guide subsequent diffusion. In the future, such
results will probably be used in determining if the laser treatment s
hould be included in the benefit package of health insurance. A strate
gy for improving diffusion processes requires continuous monitoring of
technological developments in health care to identify candidates for
such early assessment. Since assessment resources are limited, setting
priorities between candidates for assessment is necessary. Once prior
ities have been determined, an evaluative strategy can be formulated.
As in the case of laser treatment of coronary disease, a mechanism for
constraining diffusion until evaluations are completed is necessary.
Once the studies are completed, policy-making must be done promptly. T
he problem of successful implementation of this strategy lies with the
public bodies, which are often not prepared to develop an integrated
strategy of diffusion based on technology assessment and economic appr
aisal. Developing such a strategy, which would involve slowing diffusi
on in some cases and speeding it up in others, seems to have clear ben
efits. The field of medical lasers, and the broader field of minimally
invasive therapy, seem to offer good opportunities to implement such
a strategy.