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Fundamentals Of Nursing (NURS-B260) Injections P - Kristen Needler

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Indiana University – Purdue University Indianapolis

Fundamentals Of Nursing (NURS-B260)

Injections P – Kristen Needler

Types of syringes are shown: A, 5-mL syringe. B, 3-mL syringe. C, Tuberculin syringe
marked in 0.01 (hundredths) for doses less than 1 mL. D, Insulin syringe marked in units
(50).
– The tuberculin syringe (C) is calibrated in sixteenths of a minim and hundredths of a
milliliter and has a capacity of 1 mL. Use a tuberculin syringe to prepare small amounts
of medications (e.g., intradermal, subcutaneous injections). A tuberculin syringe is useful
when small, precise doses are prepared for infants or young children.
– Insulin syringes (D) are available in sizes that hold 0.3 to 1 mL and are calibrated in
units. Most insulin syringes are U-100s, designed to be used with U-100 strength insulin.
Each milliliter of U-100 insulin contains 100 units of insulin.
Parts of the syringe:
– The parts of a syringe are the plunger, barrel, and tip.
– Fill a syringe by pulling the plunger outward while the needle tip remains immersed in
the prepared solution. Touch only the outside of the syringe barrel and the handle of the
plunger to maintain sterility. Avoid letting any unsterile object touch the tip or inside of
the barrel, the hub, the shaft of the plunger, or the needle.
Parts of the needle
– A needle has three parts: the hub, which fits onto the tip of a syringe; the shaft, which
connects to the hub; and the bevel, or slanted tip.
– The tip of a needle, or the bevel, is always slanted. The bevel creates a narrow slit when
injected into tissue that quickly closes when the needle is removed to prevent leakage of
medication, blood, or serum.
– Long beveled tips are sharper and narrower, minimizing discomfort when entering tissue
used for subcutaneous or IM injection.
– Some needles come packaged in individual sheaths to allow flexibility in choosing the
right needle for a patient, whereas others are preattached to standard-sized syringes.
– Most needles are made of stainless steel, and all are disposable.

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Fundamentals Of Nursing (NURS-B260) Injections P - Kristen Needler

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