Tuesday, April 20, 2021

Venepuncture (Blood collection)

 Venepuncture (Blood collection)
 
REQUIREMENTS: 
Cotton, ethanol, Syringe (size according to the amount of blood to be collected), needle, 23G needle (generally), Vacutainers 

PROCEDURE: 
• Take verbal consent of patient. 
• Follow universal precautions. 
• Ask patient if blood had been collected recently. If yes, try to avoid that site. 

Contraindications of venepuncture from a particular site:
1) IV fluids being given to the patient at the same time 
2) local signs of infection 
3) Haematoma 
4) fistula (created for dialysis)

• Hand of the patient should be supported. 
• Apply tourniquet (generally a glove is used to tie around the arm instead) and ask the patient to open and close the fist a few times (for congestion of vein). 
• Do not tap the veins. 
• Palpate for vein (For direction and course of vein).
 • Clean the area with cotton and alcohol in a circular motion from in-to-out without re-cleaning the area once it has been cleaned. 
• Do not re-palpate.


• Stretch the skin with non-dominant hand and pierce the skin with the needle (with bevelled end facing up) at an angle of 20 degree. 
• Aspirate the blood into the syringe.  
• Before removing the needle, untie the tourniquet (it helps to reduce the blood loss after retracting the needle)

• Remove the site. 
• Recap needle while putting pressure with the help of cotton swab on it by placing the cap on a surface and then insert needle attached to syringe inside the cap (Recapping is generally not advisable but commonly practised). 
• After capping it properly, remove the needle along with its cap. 
• Then push the blood from the syringe into prelabelled vacutainers by removing their covers. 
• Thank the patient for cooperation.


FOR BLOOD CULTURE: Blood is drawn via a heparinised syringe ( 1-2 mL lithium heparin (1000 U/mL) should be aspirated into the syringe through a sterile needle and then pushed out) into a blood  culture bottle containing the transport medium. 
The specimen is refrigerated immediately (although immediate transport of specimen to laboratory is preferred.) 

VIDEO LINK:
 
Written by our guest author - Abhishek Ganacharya
Illustrations by Anveshi Nayan
#Ae(ONE)INTERN


 

1 comment:

  1. Thanks you soo much for such great explanations ��������

    ReplyDelete

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