Louisiana’s Uniform Consent Law, La. R.S. 40:1299.40, requires disclosure of the nature and purpose of a medical or surgical procedure, together with the known risks, if any, of death, brain damage, quadriplegia, paraplegia, the loss or loss of function of any organ or limb, or disfiguring scars. Thus, a competent person contemplating treatment must be advised of the known serious complications which might result. This enables the patient to make an informed decision. Written consent shall be presumed to be valid and effective, in the absence of proof that execution of the consent was induced by misrepresentation of material facts.
A doctor has a duty to disclose all risks which are “material”. To overcome the statutory presumption of informed consent where the patient has signed a consent form, the patient must first prove that a material risk existed. An adverse result does not establish a material risk. In broad outline, a risk is material when a reasonable person in what the doctor knows or should know to be the patient’s position, would be likely to attach significance to the risk or cluster of risks in deciding whether or not to forego the proposed therapy. The factors contributing significance to a medical risk are the incidence of injury and the degree of the harm threatened. If the harm threatened is great, the risk may be significant even though the statistical possibility of its taking effect is very small. But if the chance of harm is slight enough, and the potential benefits of the therapy or the detriments of the existing malady great enough, the risk involved may not be significant even though the harm threatened is very great.
The determination of materiality is a two-step process. The first step is to define the existence and nature of the risk and the likelihood of its occurrence. “Some” expert testimony is necessary to establish this aspect of materiality because only a physician or other qualified expert is capable of judging what risk exists and the likelihood of occurrence. The second prong of the materiality test is for the trier of fact to decide whether the probability of that type harm is a risk which a reasonable patient would consider in deciding on treatment. The focus is on whether a reasonable person in the patient’s position probably would attach significance to the specific risk. This determination of materiality does not require expert testimony.