The needle for the installation of the subclavian catheter KV-2 diameter 1.0 TM Kammed is made of high quality medical steel. The inner diameter of the needle is adapted to the conductor, through which a polyethylene catheter is inserted into the subclavian vein.
Recommendations for use
The needle usually enters the terminal section of the subclavian vein at a depth of 1-1.5 cm in newborns, 1.5-2.5 cm in children under 5 years old, 3-4 cm in adults. The advancement of the needle into the depths of the soft tissues stops from the moment blood appears in the syringe. Carefully pulling the piston towards you, under the control of the flow of blood into the syringe, the needle is passed into the lumen by 1-1.5 cm.
It should be remembered that the lumen of the subclavian vein, contrary to the opinion prevailing for a long time, varies depending on the phase of respiration: it increases on exhalation and decreases on inspiration until it disappears. The oscillation amplitude can reach 7-8 mm.
To control the correct position of the cut of the needle in the vein, it helps to apply a notch or solder on the pavilion of the needle, respectively, to the side of its sharpening. To prevent air embolism, at the moment the needle or catheter is disconnected from the syringe or infusion system, the patient is asked to take a deep breath, hold his breath and close the cannula of the needle with his finger, and during mechanical ventilation increase the pressure in the inhalation circuit. It is advisable to avoid puncture in coughing patients or when the patient is in a semi-sitting position.
A needle-cannula is inserted into the outer end of the catheter, which serves as an adapter for connecting to a syringe or infusion system.
Produce control aspiration of blood. The correct location of the catheter is recognized by the synchronous movement of blood in it with a span of up to 1 cm. If the fluid level in the catheter moves away from the outer end of the catheter with each breath of the patient, the inner one is in the right place. If the fluid is actively coming back, the catheter has reached the atrium or even the ventricle.
