Final answer:
The instrument called a a) trocar is used to penetrate body cavities for fluid drainage. Non-critical items only contact intact skin and do not penetrate sterile tissues, requiring less rigorous disinfection. Endoscopes, which can include a light and camera, allow doctors to view and perform procedures inside the body.
Step-by-step explanation:
An instrument that penetrates a body cavity for drainage of fluid is called a a) trocar.
This medical device is designed to provide access to body cavities for the removal of fluids or gas.
It often consists of a sharp, pointed instrument encapsulated within a tube.
Other instruments mentioned, such as a hemostat, are used to clamp blood vessels, a curette is designed to scrape tissue or debris, and a retractor is utilized to hold back tissues or organs for better access or viewing during surgery.
A medical item that comes into contact with intact skin and does not penetrate sterile tissues or come into contact with mucous membranes is referred to as a non-critical item.
These items require less stringent disinfection standards compared to those that enter sterile tissue or the vascular system.
An endoscope is a flexible or rigid tube equipped with a light and camera that allows medical professionals to look inside the body.
Endoscopes are frequently used in diagnostic and surgical procedures such as arthroscopic surgery or for obtaining samples like an intestinal polyp biopsy.