Real information about blood drawing

Real information about blood drawing

Blood donation & the site preparation

While drawing blood, the site must be prepared for the healthy and safe environment. In general, blood is drawn from the veins (nearest to the skin) of the large arm. The person drawing blood will try to locate the median cubital vein for piercing before drawing blood. The place is inside the elbow.

After locating the right place to pierce, the blood vessel’s upper skin is cleared with chlorhexidine or iodine so that skin bacteria does not contaminate the collected blood nor the donor’s body get infected due to piercing of the skin.

The needle’s size is normally are large, such as 16 to 17 gauge, as it can minimize shearing forces and prevent physical damage of red blood cells, flowing through the needle.   Before starting the blood- drawing procedure, upper arm is wrapped with a tourniquet. This is done to increase the blood pressure in the arm and speeding up the process. The other way of speeding up the blood flow through the vein is giving an object to the donor for squeezing in a repeated way.

A mechanical way of preventing blood clotting

Other than the above said system of blood collection, blood clotting is also prevented through some scientific way.

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What is whole blood donation or drawing of whole blood?

Commonly blood is collected from the donor’s body to a medicated container. Depending on the country’s law the amount of blood drawn remains in between 200 milliliters and 550 milliliters. Otherwise of it, 450 to 500 milliliters are the typical measure.

What is the storage unit of collected blood?

A flexible plastic bag is always used for storing collected blood. The bag contains different necessary chemicals like phosphate, dextrose, sodium citrate and sometimes adenine. This is the preventing measure for blood getting clotted as well preserving blood in a good condition. Some other chemicals are also used during the processing the blood.

What is plasma transfusion?

The plasma is separately extracted for transmitting plasma. Fractionation is the known process of medicated plasma transfusion. In fact it is also known as drying of plasma. Some other variants are also used for different types of medications.

What is Apheresis?

Apheresis is a different method of blood donationThis is the preventing measure for blood getting clotted as well preserving blood in a good condition. Some other chemicals are also used during the processing the blood.

Apheresis is a different method of blood donation. In this method, blood is passed through some apparatus. The apparatus not only separates one constituent mainly, it also returns the remaining constituents to the donor. The returnable component in most of the cases is the red blood cells. Because this portion of the blood takes longer time to get replaced. So this method is very helpful for those donors who want to only donate platelets or plasma more frequently than whole blood donation. Even both the plasma and platelet can be donated in place of whole donation.

Like plasma, platelets can be separated from the whole blood, but not through a single donation. It needs multiple donations.

How much amount of blood is required for therapeutic dose?

Any therapeutic dose needs 3 to 10 units of whole blood. In each donation, Platelet apheresis actuates one full dose. The use of Platelet apheresis is to collect source plasma, which is an important item for manufacturing medications (from the whole blood) in the similar system of plasma. If platelet apheresis is collected in the same process of plasma, it is known as concurrent plasma. The use of apheresis is to collect more blood cells, if compared with a single donation, which is called as “double reds. This is mainly for collecting “white blood cells” from blood.

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0 # Rohan 2017-10-08
Hii, I am from Nandurbar, can you plz tell me What is the mode of infection in syphilis ?
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0 # Dr. Pooja 2017-10-09
90 percent cases in syphilis are transmitted through unsafe sexual contacts, Mothers can also pass infection through breast milk, you can also consult with good Gynecologist in Nandurbar .
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0 # Tushar 2017-08-17
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0 # Dr. Naresh 2017-08-18
veneral diseases are those which can be spread through sexual contact, The spreading agents can bacteria ,viruses etc, The examples are syphilis and gonorrhoea can be can spread by sexual contact, you can also find list of Gynecologist in Jalor.
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0 # Vivaan Older than three months
My friend has been diagnosed with gonorrhoea, Please tell which tests will be advisable, also suggest gynec in Khargone ?
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0 # Dr. Naresh Older than three months
VDRL tests should be done every month for 3 consecutive months for detecting syphilis as well as other sexually transmitted diseases,These tests should be conducted at proper times, find good Gynecologist in Khargone
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