Types of Needles and Syringes

Among the most used medical apparatus used are syringes and needles. This article looks at the types of needles and syringes used in most health facilities today.

Classification of Syringeskmnb35edt6y3e7du2i292

Luer-Lok and Non-Luer Lok are two types of syringes that are mostly discussed as per their classification. Each type of syringe has a different tip. The Luer-Lok types of syringes have their tips twisted and so that needles can be twisted and locked so that they fit appropriately. They are designed in such a way that needles do not slip out of the syringe.

Another classification of syringes is per the purpose each one is used. The tuberculin and insulin syringes are two most widely used syringes.

Insulin Syringes

They are small in size, and they are capable of holding medication of 0.3 to 1ml. Insulin syringes are calibrated in units and not in milliliters, but the majority of these syringes are calibrated up to hundred units. These syringes are also designed to allow self-injection. They are used mostly to administer subcutaneous injections.

Tuberculin Syringes

Tuberculin syringes are used to test patients for tuberculosis. These syringes have fluid in them which gets injected directly into the skin of the patient. Unlike the insulin syringes, tuberculin syringes are smaller in size and they are calibrated in milliliters. They also have a thin barrel which comes with a pre-attached needle. They can hold medication of up to 1ml. Tuberculin syringes are not used in giving insulin despite having a petite structure.


There are several types of needles available in the market and majority has a stainless steel body. They have a miniature hole in the middle, and they have a hollow structure. They are segregated into three main parts namely the hub, shaft and bevel. The hub is that part which fits in the syringe tip. The shaft is the slender part while the bevel is the slanted tip.

The length and diameter are two factors used to classify needles. Their length mostly ranges from 0.5 inches to 3 inches while the kmnb35edtc6y27du82i92diameter is measured in gauge. For example, a needle that has a 19 gauge has a bigger diameter than a 25 gauge needle. This means, the greater, the greater the gauge of the needle the smaller the diameter it possesses.

The minimum gauge of a needle should be 7-gauge while the maximum should be 33-gauge. The needle that the doctor uses is determined by the type of medication they are injecting. If the medication is thick, they will use a needle with a small gauge, and if the medication has less density, bigger gauge needle is used.