Some medical<unk> s are parts of a simple physical examination which require only simple tools in the hands of a skilled practitioner, and can be performed in an office environment. Some other<unk> s require elaborate equipment used by medical technologists or the use of a sterile operating theatre environment.
Some<unk> s require samples of tissue or body fluids to be sent off to a pathology lab for further analysis.  Some simple chemical<unk> s, such as urine pH, can be measured directly in the doctor's office.
Most medical<unk> s are conducted on the living; however, some of these<unk> s can also be carried out on a dead person as part of an autopsy.
Medical<unk> s can be classified into three categories:
invasive
minimally invasive
non-invasive
The result of a<unk>  may be positive or negative: this has nothing to do with a bad prognosis, but rather means that the<unk>  worked or not, and a certain parameter that was evaluated was present or not. For example, a negative screening<unk>  for breast cancer means that no sign of breast cancer could be found (which is in fact very positive for the patient).
Other characteristics of<unk> s include:
sensitivity
specificity
positive predictive value
negative predictive value
false positive
false negative
Diagnostic test
Cough classification
Risk factor template
Microbiology template
Virus classification
Test
Allergy classification
Drug allergy classification