The CT contrast Media injector is a commonly used imaging consumable in clinical diagnosis and is also applied in enhanced CT scans. Clinically, CT scans are mainly divided into two types: regular CT scans and enhanced CT scans. Regular CT scan is quick; the patient lies flat on the CT scanner machine and it can be finished in seconds.

An enhanced CT scan also requires scanning, but it differs with a contrast agent that must be injected into the body. The high-pressure injector delivers the contrast medium into the patient’s blood vessels via an indwelling needle. The contrast medium then distributes the blood flow to various organs and tissues, increasing X-ray absorption values, tissue density, and imaging signals.

  1. Place the CT injector machine vertically upward. Use a disposable Quick Fill Tube ( QFT) / J Tube to draw out the contrast agent (commonly enhanced ioversol or iobimol for vascular CTA) for Barrel A. Use a large spike to draw out an appropriate dose of 0.9% saline for Barrel B . Strictly follow aseptic techniques when drawing out the drug (remember to reuse it if it is contaminated, which is taboo).

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  1. Press move piston (moving piston key) when drawing out the drug. After pressing it, the indicator light turns white. You can operate the piston key under the corresponding syringe: press the back piston for the suction state, and press the forward piston for the discharge state (do not discharge too fast to avoid adhesion of the contrast agent and damage to the high-pressure syringe).

 

  1. When the dose window shows that the drug dose drawn reaches the drug dose required for the inspection, stop drawing out the drug, and connect the A and B-tube syringes to the head end of the Y connecting tube respectively.

 

 

  1. After connecting the tail end of the Y connector to one end of the disposable intravenous connecting tube (remember that the connecting tube is for one person only, and the cap at the head end should be removed), press the moving piston. After pressing, the indicator light will light up. Press the forward piston corresponding to Barrel B and use 0.9% saline to exhaust all the air in the pipeline. After all the air is exhausted, place the injection syringe downward.

 

  1. The patient’s intravenous indwelling needle is first inhaled with a 5ml syringe to draw 4ml of normal saline and then quickly pushed intravenously to confirm whether the indwelling needle is unobstructed; after confirmation, the other end of the connecting tube is connected to the main cavity of the intravenous indwelling needle. After the connection is completed, the “buckle” of the indwelling needle remains open.

 

  1. Finally, please sort the garbage and keep ct contrast injector machine clean.

Notes:

  1. Before aspirating the drug, you must double-check the following with the technician:

① Patient information (such as patient identity, examination items, and basic condition assessment).

② Name and dosage of contrast agent.

③ Informed consent for the use of iodine contrast agent and renal function report within two weeks.

  1. When using saline to push the test needle, if the patient’s venous access is found to have a risk of hyperosmosis, it is necessary to communicate with the technician in time about the injection rate.
  2. The connecting tube must be unobstructed, without entanglement or folding, and the indwelling needle must be “buckled” open to prevent excessive pressure in the lumen from bursting when injecting drugs.
  3. Before leaving get off work every day, wipe the high-pressure contrast injectors and keep it clean.
  4. Emergency patients on night shifts need to be examined and enhanced, Please remember to ask the emergency nurse to accompany you.

 

The above preparation steps for CT angiographic injection in enhanced CT examinations.  It actually operates easily.