A nurse administers RhoGAM to an Rh-negative client after delivery of an Rh-positive newborn based on the understanding that this drug will prevent her from:
Developing AB antigens in her blood.
Developing Rh sensitivity.
Becoming Rh-positive.
Becoming pregnant with an Rh-positive fetus.
The Correct Answer is B
Choice A rationale
RhoGAM (Rh Immune Globulin) is designed to neutralize Rh-positive fetal red blood cells that enter the maternal circulation, preventing the mother from developing anti-D antibodies. It does not influence the production of AB antigens, which are part of the separate ABO blood group system and are genetically determined.
Choice B rationale
RhoGAM contains anti-D antibodies that bind to any Rh-positive fetal red blood cells that may have crossed the placenta into the Rh-negative mother's bloodstream. This masks or destroys the fetal cells, preventing the mother's immune system from recognizing them and initiating its own primary immune response and subsequent Rh alloimmunization or sensitivity.
Choice C rationale
A person's Rh status is determined by their genetic makeup (presence or absence of the D antigen on red blood cells) and cannot be changed from Rh-negative to Rh-positive by administering a passive antibody preparation like RhoGAM. The drug temporarily suppresses the immune response, it doesn't alter the genotype.
Choice D rationale
RhoGAM acts to prevent Rh sensitization in the current Rh-negative mother. It has no effect on the mother's ability to become pregnant with a future fetus who may inherit an Rh-positive status from the father, as fertility and fetal inheritance are independent biological processes.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
Choice A rationale
Dropper feeding for the initial post-operative period (typically 1–2 weeks) is a standard measure to minimize tension and stress on the newly repaired cleft lip suture line. Using a soft, controlled delivery method prevents the strong sucking action required for a bottle or straw, which could disrupt the delicate surgical approximation of the muscles and skin, compromising the cosmetic and functional outcome and increasing the risk of wound dehiscence or infection.
Choice B rationale
Introduction of solid food is inappropriate in the immediate post-operative phase, typically weeks to months after the procedure, depending on the infant's overall recovery and ability to tolerate thicker textures. Early introduction could introduce particulate matter to the surgical site, increasing the risk of contamination and infection. Furthermore, chewing and manipulation of solids would place excessive, potentially damaging, mechanical stress on the healing tissues.
Choice C rationale
Bottle feeding necessitates vigorous sucking and facial muscle movement to extract milk, which directly contradicts the post-operative goal of minimizing tension on the repair. The pressure created by sucking can exert shearing forces and excessive stretching on the surgically joined tissues, potentially leading to wound dehiscence (rupture or opening) or a less favorable long-term scar. Alternative feeding methods like a syringe or special cleft palate feeders are generally used.
Choice D rationale
Drinking from a straw requires a significant amount of negative pressure (suction) generated by the oral muscles and cheeks, which exerts substantial force on the healing lip structure. This forceful action is highly likely to disrupt the delicate surgical closure, leading to separation of the wound edges (dehiscence) and poor healing. Specialized feeding techniques are necessary to ensure adequate nutrition while protecting the surgical site integrity.
Correct Answer is ["1000"]
Explanation
Step 1 is: Convert the child's weight from pounds to kilograms. The conversion factor is 1 kg ≈ 2.2 lbs. 44 lbs÷ 2.2 lbs/kg = 20 kg.
Step 2 is: Calculate the minimum safe daily dosage using the recommended range (25 mg/kg/24 h). 25 mg/kg/24 h× 20 kg = 500 mg/24 h.
Step 3 is: Calculate the maximum safe daily dosage using the recommended range (50 mg/kg/24 h). 50 mg/kg/24 h× 20 kg = 1000 mg/24 h.
Step 4 is: State the minimum and maximum safe daily dosage range. The safe daily dosage range is 500 𝐦𝐠/24 𝐡 to 1000 𝐦𝐠/24 𝐡.
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