METHOD OF EXTREMITY VEIN CATHETERISATION Russian patent published in 2011 - IPC A61M25/01 A61K31/167 A61K38/49 A61P7/02 

FIELD: medicine.

SUBSTANCE: invention refers to medicine, and can be used if extremity vein catheterisation is required for multiple intravenous introduction of drug solutions. That is ensured by vein catheterisation followed by change of an extremity position with respect to a patient's trunk so that an open pavilion of the catheter is arranged below a level of a patient's right atrium. An infrared imager is used to monitor an extremity surface condition within a projection of the catheter. If observing a region of local hyperthermia along the vein, its content is examined by ultrasound. A thrombus if any is sized up; tourniquets are applied below and above the region of local hyperthermia to complete sanguimotion cessation in the vein. Then, blood is taken from the vein to its devastation, and the volume of taken blood portion is measured that is followed by introduction of 2% lidocaine hydrochloride 0.5 ml and a thrombolytic solution at temperature +42°C in the volume necessary for complete vein filling. 3 minutes later, the whole liquid vein content is removed through the catheter, and the tourniquets are released, the vein content is examined by ultrasound. The presence of a thrombus requires another 3-minute tourniquet application with venous blood replacement by a local anaesthetic solution with a thrombolytic agent to stabilise thrombus size, then the catheter is removed, and the drugs are introduced by means of another catheter which is inserted in another extremity vein.

EFFECT: method allows higher safety and effectiveness of vein catheterisation due to early phlebitis detection and exact delivery of fibrinolytic agents to the thrombus to dissolve a "fresh" portion of the thrombus that allows reducing a risk of thromboembolism.

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