ENDOSCOPY
WHAT ARE RIGID ENDOSCOPES where are the used?
These viewing instruments are metallic telescopes, with light for Diagnosis, and biopsy.
They are introduced through natural body orifices eg. Bronchoscopy, esophascopy, colonoscopy etc.
-Today rigid endoscopes are also being used to view the interior of *joints (arthroscopies) and
*the kidney (nephroscope) and
*abdomen (laparoscope).
They are introduced through incised openings. They have four
Basic components:
* Eye piece (Viewing lens)
* Body tube contains light guide connector, valves to channels
* Shaft (lens channels)
* Distal end Objective lens
WHAT ARE FIBREOPTIC ENDOSCOPES?
These sophisticated instruments have made the diagnosis of
Lesions in the accessible segments of the GI tract possible,earlier, and accurate, since visual imaging, and biopsy of the lesions is possible.
High resolution images can be recorded on:
* Color films for case of record for follow up
* Cine film for arranging learning film material
* Television monitor for ease of viewing of procedure and learning
For realtime assistants
Fibre-optics lighting and imaging systems have replaced the
Conventional rigid optic and light systems in endoscopes.
- Fibre-optics is a term applied to a system for transmitting
light and images through thin optical fibers by total
Internal reflection Fig 5.1
- The fibre-optic endoscope system consists of three parts:
. The light source or generator unit (A as shown in Fig 7.1)
. The insertion tube with the optical image bundle (B as
shown in Fig 7.1)
. The instrument or endoscope control section near the eye
Piece(C as shown in Fig 7.1)
. The light source is a high-intensity lamp in a box with an
In-built curved reflector (D as shown in Fig 7.1)
- This ensures that cold light is passed to the instrument or
Endoscope since the heat is left in the light source box
- Special lamps such as quartz iodine, metal halide and xenon
have been developed to give a higher intensity of light of
up to 500 Watts.
Any questions be sent to drmmkapur@gmail.com
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