Related Experiment Video
Updated: Jan 21, 2026

Preparation and Analysis of In Vitro Three Dimensional Breast Carcinoma Surrogates
Published on: May 9, 2016
Who Makes Decisions for Incapacitated Patients Who Have No Surrogate or Advance Directive?
1A senior research associate for the American Medical Association Council on Ethical and Judicial Affairs in Chicago, Illinois, and the legal editor for the AMA Journal of Ethics.
Abstract:
Unrepresented patients are those who have no surrogate or advance directive to guide medical decision making for them when they become incapacitated. While there is no perfect solution to the problem of making medical decisions for such vulnerable patients, 3 different approaches are noted in the literature: a physician approach, an ethics committee approach, and a guardianship approach. Recent policies and laws have required an approach that is "tiered" with respect to both who is involved and the gravity of the medical treatment questions at issue. In a general sense, some variant of a tiered approach is likely the best possible solution for jurisdictions and health institutions-both those already with and those without a tiered approach-to the challenging puzzle of treating unrepresented patients.
Related Concept Videos
Decision Making
Automatic decision-making is fast, intuitive, and relies on gut feelings...
Decision Making: P-value Method
First, a specific claim about the population parameter is proposed. The claim is based on the research question and is stated in a simple form. Further, an opposing statement to the claim is also stated. These statements can act as null and alternative hypotheses: a null hypothesis would be a neutral statement while the alternative hypothesis can...
Extraction: Advanced Methods
Overview of Advanced Functional Groups
Functional groups are groups of atoms with specific chemical properties that occur within organic molecules and are sometimes denoted as “R”. Functional groups can “functionalize” a compound by enabling it to adopt different physical and chemical properties.
Types of Advanced Functional Groups
The table below summarizes some of the major functional groups in organic chemistry.
Decision Making: Traditional Method
First, a specific claim about the population parameter is decided based on the research question and is stated in a simple form. Further, an opposing statement to this claim is also stated. These statements can act as null and alternative hypotheses, out of which a null hypothesis would be a...
Directing Effect of Substituents: meta-Directing Groups

