How does immobility contribute to the development of orthostatic hypotension?
Increases blood pressure
Reduces the risk of falls
Improves cardiovascular function
Cardiac deconditioning
The Correct Answer is D
A. Immobility does not increase systemic blood pressure; rather, it often leads to a decrease in vascular tone and a reduction in circulating blood volume. When a patient is sedentary, the baroreceptors become less sensitive to pressure changes. Consequently, when the patient stands, the body fails to provide the vasoconstriction necessary to maintain adequate blood pressure to the brain.
B. Orthostatic hypotension significantly increases the risk of falls rather than reducing it. The sudden drop in blood pressure upon standing leads to cerebral hypoperfusion, causing dizziness, syncope, and blurred vision. These symptoms compromise the patient's balance and stability, making them highly susceptible to accidental trips and injuries during initial ambulation attempts after periods of bed rest.
C. Cardiovascular function is impaired by prolonged immobility as the heart muscle begins to atrophy and the stroke volume decreases. The cardiovascular system requires regular gravitational and physical stress to maintain its efficiency in pumping blood against gravity. Without this stimulation, the heart must work harder at a higher heart rate to maintain cardiac output, representing a decline in overall function.
D. Cardiac deconditioning is the physiological process where the heart and peripheral vasculature lose efficiency due to a lack of physical activity. This leads to a decreased ability of the autonomic nervous system to rapidly constrict lower-extremity veins when a patient moves to an upright position. The resulting venous pooling reduces venous return and cardiac output, manifesting as a significant drop in blood pressure.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is C
Explanation
A.Standards of professional performance describe the competent level of behavior in the professional role, such as ethics, education, and collaboration. While it includes ethics, its primary focus is on the objective behaviors and expectations of the nurse as a professional. It serves as a benchmark for professional accountability rather than a foundational guide for moral principles.
B.Standards of practice consist of the nursing process (assessment, diagnosis, outcomes identification, planning, implementation, and evaluation) to ensure quality care. These standards outline the significant responsibilities that the nurse is expected to perform competently in clinical practice. They are technical and procedural frameworks rather than a philosophical guide for distinguishing right from wrong.
C.A code of ethics is a collective statement of shared values, expectations, and moral obligations that provides a framework for right and wrong. It serves as an articulation of the nurse's commitment to the patient and the public regarding ethical behavior and decision-making. This document guides the nurse in navigating complex moral dilemmas and maintaining professional integrity in all clinical interactions.
D.Quality and safety education for nurses (QSEN) is a framework designed to prepare future nurses with the knowledge, skills, and attitudes necessary to improve healthcare quality. It focuses on competencies like patient-centered care, teamwork, and informatics to enhance systemic safety. While vital for clinical excellence, it is not the primary guide for moral and ethical principles in nursing.
Correct Answer is C
Explanation
A.Surgical asepsis involves sterile techniques that are often too complex and unnecessary for the average patient to perform at home for standard wound care. While keeping a wound clean is important, medical asepsis is usually sufficient for home settings. Teaching complex sterile procedures may lead to errors and does not address the broader risk of systemic infection.
B.Limiting visitors during flu season is a helpful supplementary measure, but it does not address the primary mode of germ transmission in the home environment. Many infections are spread through direct contact with surfaces or personal items rather than just respiratory droplets from visitors. This action is too narrow in scope to be considered the single most effective infection control technique.
C.Medical asepsis handwashing is the single most effective way to prevent the transmission of microorganisms and reduce the risk of infection. It breaks the chain of infection by removing pathogens from the hands before they can enter the body or be spread to others. Teaching proper hand hygiene ensures the patient can maintain a safe environment regardless of the specific health challenge.
D.Sanitizing eating utensils is a basic hygiene practice but is less effective than handwashing because germs are more frequently spread through hand-to-mucosa contact. While cleanliness in the kitchen is important, it does not provide the same level of protection against the various pathogens encountered in daily life. Handwashing remains the gold standard for personal infection prevention and public health.
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