Which factor contributes to the formation of a pressure injury when a patient’s body slides downward to the foot of the bed?
Shearing force.
Acceleration.
Momentum.
Applied force.
The Correct Answer is A
Choice A rationale:
Shearing force is the primary factor that contributes to the formation of pressure injuries when a patient's body slides downward. It occurs when two surfaces move in opposite directions, causing stress and strain on the tissues between them.
Compression of Tissues: When the patient's body slides downward, the skin and underlying tissues are compressed between the bony prominences (such as the sacrum or heels) and the surface of the bed. This compression restricts blood flow to the area, depriving the tissues of oxygen and nutrients.
Tissue Stretching and Tearing: As the body slides, the skin and underlying tissues are also stretched and pulled in opposite directions. This shearing force disrupts the normal alignment of cells and tissues, leading to microscopic tears and damage.
Impaired Blood Flow: Shearing force further compromises blood flow by stretching and compressing blood vessels. This reduces the delivery of oxygen and nutrients to the tissues, while also hindering the removal of waste products.
Tissue Damage and Necrosis: The combination of compression, stretching, and impaired blood flow leads to cell death and tissue necrosis. This is the hallmark of pressure injuries, which can range from superficial blisters to deep ulcers that extend into muscle and bone.
Factors that Increase Shearing Force: Certain factors can increase the risk of shearing force and pressure injury development, including:
Increased moisture (from sweat or incontinence) Decreased mobility
Poor skin integrity
Malnutrition
Friction from bedsheets
In conclusion, shearing force is the main factor that contributes to pressure injury formation when a patient's body slides downward. It disrupts blood flow, damages tissues, and can lead to significant wounds.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is B
Explanation
Choice A rationale:
A lactose-free diet does not contraindicate acupuncture therapy. Lactose intolerance is a digestive condition that does not affect blood clotting or the ability to receive acupuncture safely.
Acupuncture needles are very fine and do not typically cause bleeding. Even if minor bleeding occurs, it is not a concern for individuals without bleeding disorders.
Therefore, a lactose-free diet does not pose a risk for acupuncture.
Choice B rationale:
Thrombocytopenia is a condition characterized by a low platelet count. Platelets are essential for blood clotting. Acupuncture involves the insertion of needles into the skin. This can cause minor bleeding, even when performed correctly.
In individuals with thrombocytopenia, even minor bleeding can be difficult to control and may lead to excessive bruising or hematoma formation.
Therefore, thrombocytopenia is a contraindication to acupuncture therapy due to the increased risk of bleeding complications.
Choice C rationale:
Herniated lumbar disks are a common condition that can cause back pain. Acupuncture is often used to treat back pain, including pain caused by herniated disks.
Studies have shown that acupuncture can be effective in reducing pain and improving function in patients with herniated disks.
Therefore, the presence of herniated lumbar disks does not contraindicate acupuncture therapy.
Choice D rationale:
Latex and strawberry allergies are not contraindications to acupuncture therapy. Acupuncture needles are typically made of stainless steel, which does not contain latex.
Additionally, acupuncture does not involve the use of strawberries or any other substances that are common allergens. Therefore, latex and strawberry allergies do not pose a risk for acupuncture.
Correct Answer is C
Explanation
Choice A rationale:
Inaccurate statement: While herbal supplements are derived from plant materials, this does not inherently guarantee their safety or non-toxicity. Some plants contain potent compounds that can have adverse effects, even in small doses.
Lack of regulation: Herbal supplements are not regulated by the FDA in the same way as prescription medications. This means that there is no guarantee of their purity, potency, or consistency.
Potential for interactions: Herbal supplements can interact with prescription medications, potentially leading to harmful side effects.
Choice B rationale:
Cost-related issue: The cost of herbal supplements can vary widely. While some may be less expensive than prescription medications, others can be quite costly.
Misleading focus: Emphasizing cost as a primary factor could lead patients to prioritize affordability over safety and effectiveness.
Choice C rationale:
Addresses quality concerns: This response directly addresses the lack of stringent quality standards for herbal supplements, highlighting a significant safety concern.
Encourages informed decision-making: This response encourages patients to carefully consider the potential risks and benefits of herbal supplements, prompting them to seek reliable information and discuss their choices with healthcare providers.
Choice D rationale:
Convenience vs. safety: While the convenience of herbal supplements may be appealing, this response does not address the potential safety concerns associated with their use.
Potential for misuse: Highlighting convenience could lead to patients using herbal supplements inappropriately or without necessary guidance from healthcare professionals.
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