Introduction of problems and solving skills in clinical blood collection by manufacturers of vacuum blood collection

Problems and Countermeasures of vacuum blood collection manufacturers

1. The vacuum is too small or no vacuum (no blood can be seen in the blood collection vessel or the blood volume is less than the preset volume of the blood collection vessel)

Venous collapse is caused by insufficient venous pressure.

Countermeasures: gently pat the skin above the blood vessel, or let the patient repeatedly clench his fist, so that the blood can flow out smoothly; or you can pull out the blood collection vessel, let the vein recover, re attach the tourniquet, and insert the same blood collection vessel again.

The plug puncture needle did not penetrate the rubber plug or the needle angle was too large, and the side wall of the rubber plug was inserted.

Countermeasures: the needle should be inserted vertically into the center of the rubber plug.

When the butterfly wing blood sampling needle is used, the connection part between the hose seat and the tube plug puncture needle seat is not tightened, resulting in the loss of vacuum.

Countermeasures: before venipuncture, tighten the connection between the soft tube holder and the puncture needle seat of the tube plug clockwise.

The needle did not fully insert or touch the vein.

Countermeasures: continue to push the needle for subcutaneous search until you feel the "sense of loss" of the needle puncture vein.

Improper venipuncture sites were selected (e.g. to thrombus concentrated areas or vascular malformations).

Countermeasures: slightly rotate the puncture needle or re puncture.

Patients with poor constitution, high blood viscosity (such as the elderly, high fever, severe burn patients, etc.).

Countermeasures: when the wound surface of the patients is acceptable, choose a larger blood collection needle than the infusion, and try to choose the main vein for puncture.

Tourniquet is too far from the puncture point or tied too loose, resulting in blood vessels not filling.

Countermeasures: correctly grasp the distance between tourniquet and puncture point, timely adjust the position of tourniquet: tighten the tourniquet to make blood vessels full.

The blood collection needle type selection is too small, tube replacement time is prolonged, resulting in exogenous coagulation.

Countermeasures: when the wound surface of the patients is acceptable, choose a larger blood collection needle than the infusion, and try to choose the main vein puncture: shorten the tube change time; improve the proficiency of the operator.

The vacuum blood collection vessel was pulled out too early.

Countermeasures: pull out the plug puncture needle when the blood in the vacuum collection vessel stops flowing.

System limitations:

The amount of blood collected will decrease with the increase of the ambient temperature and the altitude of the area where the blood collection is used.

When the vacuum is set for closed blood collection needle test in production control, but in actual use, the blood collection volume of the first blood collection vessel will be reduced by about 0.3ml due to the filling consumption of the hose gap.

2. Blood leakage

The blood blocking sleeve of the plug puncture needle was stripped.

Countermeasures: it is strictly forbidden to peel off the blood blocking sleeve in the whole blood collection process.

The blood blocking sleeve of the plug puncture needle is loose or the needle pricks the blood sheath, which causes the sealing of the puncture needle is not tight, and the blood leakage along the plug puncture needle during venipuncture.

Countermeasures: check whether the blood blocking sleeve is in good condition before blood collection, and re cover the needle when the needle is punctured to maintain its tightness.

The plug puncture needle did not insert the rubber plug vertically, which caused the blood blocking sleeve not rebound or rebounded too slowly.

Countermeasures: keep the puncture needle perpendicular to the surface of the rubber plug and ensure that the puncture needle of the plug is punctured from the top of the blood blocking sleeve.

When using the transfusion blood collection needle, the connection part of the hose seat and the tube plug puncture needle seat is not tightened, and the blood leaks from the connection.