Good injection practice relies on accurate site selection using anatomical markers. Five videos have been produced to assist in locating the four accepted intramuscular injection sites using anatomical markers as well as the Z track technique which should be used with all injection sites. Mental health areas commonly use intramuscular injections for the administration of medication. The Central Adelaide Local Health Network Mental Health
Directorate encourages the use of ventrogluteal and deltoid sites for intramuscular injection. Consent is required from individual consumers to use the dorsogluteal site as it presents challenges for reliable intramuscular injection and potential side effects. A review of intramuscular injection technique was conducted by the Central Adelaide Local Health Network Mental Health Directorate. The review of the published literature identified that a lack of precision in site selection can result in the medication being deposited in fat tissue rather
than muscle. Deltoid injection site videoNote: This technique is not applicable to vaccine administration.
Vastus Lateralis injection site video
Dorsogluteal injection site video
ALERTFollow instructions for SARS-COV2 vaccine administration provided on Elsevier’s Vaccination Hub undefinedhttps://elsevier.health/en-US/preview/sars-cov2-vaccine" target="_blank" title="TRANSFORM HOW YOU USE DRUG INFORMATION">https://elsevier.health/en-US/preview/sars-cov2-vaccine or Clinical Key for Nursing https://www.clinicalkey.com/nursing/#!/content/drug_monograph/6-s2.0-5295. Intramuscular (IM) injections have been associated with adverse effects and pain, and this route of medication injection should be used as a last resort. Consider contacting the practitioner for an alternative, preferred route of medication administration. Take extra care with a patient who takes medications that increase the risk for bleeding.5 Take steps to eliminate interruptions and distractions during medication preparation. OVERVIEWThe IM injection route deposits medication into deep muscle tissue, which has a rich blood supply, allowing medication to be absorbed faster than it would be by the subcutaneous route. This rich blood supply, however, increases the risk for injecting drugs directly into blood vessels. Any factor that interferes with local tissue blood flow affects the rate and extent of drug absorption. An IM injection may require a longer and larger-gauge needle to penetrate deep muscle tissue. The needle is inserted at a 90-degree angle; this varies from the angle used for subcutaneous and intradermal injections (Figure 1).2,6 The appropriate needle length is determined by the patient’s age and weight, injection site, and the amount of adipose tissue in the chosen injection site (Table 1).2,7 The needle must be long enough to reach the muscle tissue but not too long to present the risk of hitting underlying neurovascular structures or bone.2 IM injections should be administered with the needle perpendicular to the patient’s body or as close to a 90-degree angle as possible.2,6 IM injection sites should be rotated to decrease the risk for hypertrophy. When possible, IM injections should not be administered in muscles that are emaciated or atrophied because they absorb medication poorly.6 Aspiration before injection and slow injection of the medication are not required for vaccine administration.2 The vastus lateralis and deltoid muscle are the only two sites recommended for vaccine administration because they do not contain large vessels that are within reach of the needle.2 For all other medications there is no evidence to support abandoning the practice of aspiration before administration. More research is needed to investigate the practice of aspiration before administering an IM injection with medications other than vaccines.9,10 The recommended route and site for each vaccine is included in the manufacturer’s instructions for use.2 Muscle tissue is less sensitive to irritating and viscous medications than subcutaneous tissue. Smaller muscles absorb smaller volumes. For a well-developed adult, no more than 4 to 5 ml of medication should be administered in a single IM injection because the muscle tissue does not absorb it well.8 For “deep” IM injections, the recommended volume ranges from 2 to 5 ml.8 If the patient’s available muscle tissue is limited and the dorsogluteal muscle must be used, volumes of up to 4 ml can be administered into this site.8 The ventrogluteal muscle can accommodate up to 2.5 ml, with a maximum volume of 3 ml.8 The rectus femoris and vastus lateralis remain the recommended sites for volumes up to 5 ml in adults.8 A maximum of 2 ml is recommended for older adults and thin patients.8 The Z-track method (pulling the skin laterally before injection) can be used if the overlying tissue can be displaced. This technique prevents medication leakage into subcutaneous tissue, seals medication in the muscle, and minimizes irritation.6 To use the Z-track method in an adult, the appropriate-size needle is attached to the syringe, and an IM site is selected. The overlying skin and subcutaneous tissues are pulled to the side with the ulnar side of the nondominant hand. The skin is held in this position until the injection has been administered. After the site is cleansed, the needle is injected deep into the muscle, and the medication is injected slowly. After the needle is withdrawn, the skin is released. The displacement of the skin and muscle layer closes off the needle track when the skin is released (Figure 2). The Z-track method should not be used with infant vaccinations where skin is compressed. Injection SitesFor IM injections, the nurse selects a site that is free of pain, infection, necrosis, bruising, and abrasions. The location of underlying bones, nerves, and blood vessels and the volume of medication to be administered are also considered. Because of the sciatic nerve location, the dorsogluteal muscle is not recommended as an injection site. If a needle hits the sciatic nerve, the patient may experience partial or permanent paralysis of the leg.8 Ventrogluteal SiteThe ventrogluteal site involves the gluteus medius and minimus muscles and is a safe injection site for adults, children, and infants.6 This site provides the greatest thickness of gluteal muscle that is free of penetrating nerves and blood vessels and it has a narrower layer of fat.8 The dorsogluteal site is closer to neurovascular structures than the ventrogluteal site and is not a recommended site for injection. However, the thickness of the muscle in the dorsogluteal region is greater than muscle in the ventrogluteal region. Selected site for IM injections is based on clinical assessment of the patient.3 To locate the ventrogluteal site, the heel of the hand is placed over the greater trochanter of the patient’s hip with the wrist almost perpendicular to the femur. The right hand is used for the left hip, and the left hand is used for the right hip. The thumb is pointed toward the patient’s groin, with the index finger pointing to the anterior superior iliac spine, and the middle finger is extended back along the iliac crest toward the patient’s buttock. The index finger, the middle finger, and the iliac crest form a V-shaped triangle, with the injection site at the center of it (Figure 3). To relax this muscle site, the patient should lie flat and supine and flex the knee and hip, or the patient may lie on the side. Vastus Lateralis SiteThe vastus lateralis muscle is another injection site used in adults, children, and infants.6 The muscle is thick and well developed, and it is located on the anterior lateral aspect of the thigh. In an adult, the vastus lateralis extends from just above the knee to just below the greater trochanter of the femur (Figure 4). The middle third of the muscle is used for the IM injection site. To help relax this muscle site, the patient should lie flat, supine, flex the knee slightly, and externally rotate the foot, or the patient may assume a sitting position. Deltoid SiteThe deltoid site is easily accessible in many adults, but the muscle tends to be underdeveloped, which causes a potential for injury because the axillary, radial, brachial, and ulnar nerves and the brachial artery lie within the upper arm (Figure 5). This site can be used for small medication volumes (2 ml or less)8 and for administration of routine immunizations in children older than 3 years2,6 and adults with acceptable muscle mass and development, and when other sites are inaccessible because of dressings or casts.2 The deltoid muscle is located by fully exposing the patient’s upper arm and shoulder and asking the patient to relax the arm at the side or by supporting the patient’s arm and flexing the elbow. The lower edge of the acromion process, which forms the base of a triangle in line with the midpoint of the lateral aspect of the upper arm, is palpated, and the injection site is found in the center of the triangle (Figure 5). Rarely, an adverse reaction occurs after immunizations. Reactions may include anaphylaxis, anaphylactic shock, and neurologic deficits.1 Vaccine adverse event reporting is monitored by the Centers for Disease Control and Prevention. If the patient expresses concern regarding the accuracy of a medication, the medication should not be given. The patient’s concern should be explored, the practitioner notified, and the order verified. EDUCATION
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REFERENCES
ADDITIONAL READINGSCenters for Disease Control and Prevention (CDC). (2018). Vaccine administration. Retrieved on October 21, 2021, from https://www.cdc.gov/vaccines/hcp/admin/admin-protocols.html Kroger, A., Bahta, L., Hunter, P. (2021). General best practice guidelines for immunization: Best practices guidance of the advisory committee on immunization practices (ACIP). Retrieved on October 21, 2021, from https://www.cdc.gov/vaccines/hcp/acip-recs/general-recs/index.html U.S. Food and Drug Administration (FDA). (2018). Safely using sharps (needles and syringes) at home, at work and on travel. Retrieved October 21, 2021, from http://www.fda.gov/medicaldevices/productsandmedicalprocedures/homehealthandconsumer/consumerproducts/sharps/default.htm (Level VII) World Health Organization (WHO). (2015). Guiding principles to ensure injection device security. Retrieved on October 21, 2021, from http://www.who.int/infection-prevention/tools/injections/GuidingPrinciple-injection-device-security.pdf (classic reference)* *In these skills, a “classic” reference is a widely cited, standard work of established excellence that significantly affects current practice and may also represent the foundational research for practice. Elsevier Skills Levels of Evidence
When is Z track method used?THE Z-TRACK METHOD of I.M. injection prevents leakage of irritating and discoloring medications (such as iron dextran) into the subcutaneous tissue. It also may be used in elderly patients who have decreased muscle mass. Lateral displacement of the skin during the injection helps seal the drug in the muscle.
When is the Z track method recommended in parenteral medication administration?Medication absorption in the muscle is different than in the subcutaneous tissue, so it is important that medications designed to be absorbed through the muscle stay in the muscle. The the Z Track method is only used is for intramuscular injections, and not other types of injections.
What is the purpose of using the Z track method of intramuscular injection quizlet?Intramuscular. The Z-track technique is used for intramuscular injections to prevent leakage of medication into the needle track, thus minimizing discomfort.
When administering an I.M. injection using the Z track method which action is appropriate?Using the Z-track technique, the skin is pulled laterally, away from the injection site, before the injection; then the medication is injected, the needle is withdrawn, and the skin is released. This method can be used if the overlying tissue can be displaced (Lynn, 2011).
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