Mental Capacity Act (2005)

Definition:

The Mental Capacity Act (MCA) 2005 is a UK law designed to empower and protect individuals who may lack the capacity to make decisions. It ensures that decisions made on behalf of such individuals are in their best interests.

Why the Mental Capacity Act Matters:

• It safeguards individuals' rights while balancing autonomy and protection.
• It provides a clear framework for assessing capacity and making decisions for those who cannot decide for themselves.

Key Points to Understand:

• Four Requirements to Assess Capacity:
  To have capacity, a person must be able to:
  • Understand Information: Grasp the facts and implications of the decision they need to make.
  • Retain Information: Hold onto the information long enough to make a decision.
  • Use and Weigh Information: Consider the information, evaluate risks and benefits, and come to a decision.
  • Communicate the Decision: Express their decision through any means, such as speaking, writing, or gestures.
• Presumption of Capacity: All adults are assumed to have capacity unless proven otherwise.
• ​Advanced Directives: If someone has made an advanced directive (a decision made some time ago on what their healthcare decision would be if this scenario was to occur - i.e. withdrawing ventilatory support when on life support), then that decision must be followed.
• ​Lasting Power of Attorney (LPA): The patient may have legally appointed someone to be the decision maker in case they are not able to make decisions due to a lack of capacity, so double check this. If they don't have someone, an Independent Mental Capacity Advocate (IMCA) may be used - an external third party who can make a decision for this patient, although this is not an ideal scenario.
• Best Interests Principle: If someone lacks capacity and the previous steps haven't worked, or if there is no time to check the above steps due to it being an urgent situation, any decision made on their behalf must prioritise their well-being and preferences, considering what they would likely have chosen.

Example 1: Assessing Capacity for Surgery
Scenario: A 70-year-old patient with early dementia needs to decide on hip surgery but seems confused.

• Application: Use the four requirements to assess their capacity. If they cannot understand or weigh the risks and benefits of surgery, they lack capacity.
• Outcome: The healthcare team makes the decision in their best interests, involving family if appropriate.

Example 2: Communicating a Decision
Scenario: A patient with severe motor neurone disease cannot speak but can use a communication device.

• Application: As the patient can communicate their decision through the device, they meet the capacity requirement.
• Outcome: The patient's autonomy is upheld, as they can clearly express their choice.