The word you're probably looking for is "implied". But I don't really know. Check your textbook to see what answer they're expecting.
Consent by action or acquiescence.
A patient implied consent covers only one thing. The one that it will cover is blood test.
Yes, for any procedure a patient must give consent and understand the risks and benefits to the procedure. Typically the physician, PA, or APRN will discuss the risks and have the patient sign the consent. It is the nurse's responsibility to make sure that it is placed in the chart and if the patient seems to not comprehend the procedure or asks alarming questions to alert the primary care physician.
Blood testing is typically regarded as ordinary hospital care. So are X-rays and most diagnostic tests.All other tests and procedures need separate consent forms.That said, a patient can revoke consent even for one or all blood tests, if they choose to do so. If a lucid patient says No, and a nurse (or lab tech, or doctor) tries to insert a needle into a vein against patient wishes, it can be a tort. A medical person cannot touch a patient once the patient clearly states NO. Go to your Supervisor, if this occurs. A Super or the doctor might get the patient's cooperation. Of course, doctors don't like games, so the doctor could dismiss the patient from care unless the patient can express a really good reason to say no to a doctor's order.
Platelets
Blood salvage is the recovery of a patient's own blood from the surgical site to be readministered to the patient.
the patient will die
The patient benefits from blood salvage by the elimination of the risk of blood-transmitted virus or blood transfusion reactions.
Autologous blood (from the patient)
The procedure is explained and possible complications, an informed consent form signed. An intravenous line is inserted into a vein in the arm for sedation, medication and blood products. An ECG is hooked up.
A blood transfusion - is giving a patient a quantity of blood to replace any that's been lost though an accident or injury. A small sample of the patient's blood is analysed to determine the blood group & type. This is 'cross-matched' with blood of the same type stored at the hospital. A unit (or 'bag') of blood is hung above the patient from a metal stand, and a needle leading from the bag is inserted into a vein in the patient. A combination of gravity, and the patient's heartbeat drains the blood from the bag into the body. The bag is replaced when empty or the donation is stopped once the patient's blood pressure returns to normal.
It will help if the patient has low blood sugar.