Medical Instruments & Procedures
Part — 1
Plain or simple catheters
- It is a plain tube made of rubber or synthetic material.
- The terminal end of the tube is rounded. There is a hole just before the tip.
- It comes in different sizes.
- It can be used as a drain anywhere in the body even as a urinary catheter.
- It is a self-retaining catheter which can be left inside the urethra for many days.
- It is used in cases of retention of urine, and to measure the urine output.
- There is a small narrow tube inside a bigger tube. The narrow tube ends before the tip of the catheter and at the other end it is open.
- From this open end saline or plain water can be pushed in with a syringe to inflate the bulb, after insertion of the catheter into the bladder. When this bulb is inflated it is retained inside the bladder and cannot come out till the bulb is deflated.
- It is available in various sizes denoted by F for French scale.
Malecot’s Catheter —
- It is a self-retaining catheter made of red rubber. The tip of the catheter has many slits which can retract and form a winged end.
- This tip is stretched over a forceps for introduction through an opening and when this forceps is removed the tip retracts and is retained.
- It cannot be passed through the urethra, so it has no use in the female patient for urinary retention.
- It is used to drain the bladder from a suprapubic cystotomy.
- It is also used to drain empyema, pneumothorax, nephrostomy, gastrostomy.
- It cannot be used in females or males per urethra as a urinary catheter.
These are common catheters which are used in general medical uses,