The word, catheter, is derived from the Greek word of the
same name, which was an instrument used as a plug. A catheter is a hollow tubelike structure
that can be inserted into a blood vessel, duct, or body cavity. In modern uses,
catheters allow the drainage of fluids, the infusion of fluids, or act as a
conduit to allow the insertion of surgical or diagnostic instruments into a
body cavity. In some cases, catheters can be large, solid, and relatively hard
tubes. In others, they can be narrow and flexible, depending on the use.
It is believed that ancient Egyptians used metal pipes to
perform urinary catheterization to drain and collect urine from the bladder. During
the postwar era of the 20th century, polyvinyl chloride (PVC) or nylon tubes
were used as catheters. The materials were cut according to need and sterilized
with other medical equipment to prevent infection.
Catheterization is a process in which the catheter is inserted
into the body cavity. The earliest
published descriptions of human catheterization were done by Fritz
Bleichroeder, E. Unger, and W. Loeb in 1912. They were among the first to
insert catheters into blood vessels without X-ray visualization.
Modern catheters are tubes into which instruments can be inserted
or various fluids injected or drained. There are vast differences in modern
catheters, however, because of the materials used and their ability to
facilitate a number of procedures.
Catheters are constructed with an outer tube of various
shapes that can be flexible or rigid, interior tubes (lumens) that act as
conduits for medications or instruments, tips that are coated to allow
visualization under X-ray or fluoroscopy, and various coatings that allow
prolonged implantation into the body without rejection or that make insertion
more comfortable.
Catheters have become important medical devices, and
applications range from low-end introduction of fluids and medications to high-end
applications such as placement of stents, performance of angioplasty, and
measurement and monitoring of body parameters such blood pressure and
temperature.
Depending on the type of catheter used, there are six major
application areas:
- Cardiovascular
- Urological
- Neurovascular
- Intravenous
- Measurement of certain body parameters
- Specialty.
Different applications often require catheters with various characteristics
or properties. For example, angiography, neurology, urology, and central venous
catheters travel through the body after they are inserted into blood vessels
and must possess more flexibility.
Catheters are important medical devices because they frequently
are used in more than five key medical and surgical areas. Various key market
drivers influence the growth of the medical device market. These drivers can be
economic, epidemiological, technological, or industry-based factors.
The above is an
extract from the BCC Research report, Global Markets for Catheters (HLC019E).
To download the complimentary first chapter, please click
here.
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