The provider prescribes the following: Ceftriaxone 1.5g IVPB every 12 hours.
The pharmacy sends up a vial (4g) that needs to be reconstituted with 12mL of sterile water for a final concentration of 2g per 2.5mL.
How many milliliters will be drawn up to add to a 100mL bag of D5W to administer to the client? (Do not use a leading zero, Round to the nearest tenth, Do not use a trailing zero). mL
The Correct Answer is ["1.9"]
Step 1 is to determine the concentration of the reconstituted medication. The vial contains 4g and is reconstituted with 12mL for a final concentration of 2g per 2.5mL.
Step 2 is to calculate how many mL are needed for the 1.5g dose. The desired dose is 1.5g. The concentration is 2g in 2.5mL.
Step 3 is to set up a proportion: (2g ÷ 2.5mL) = (1.5g ÷ X mL).
Step 4 is to solve for X: X mL = (1.5g × 2.5mL) ÷ 2g.
Step 5 is to calculate the value: X = 3.75 ÷ 2.
Step 6 is to calculate the final answer: X = 1.875 mL.
Step 7 is to round to the nearest tenth: 1.9 mL. The final calculated answer is 1.9 mL.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is B
Explanation
Choice A rationale
Brain death is a clinical diagnosis characterized by irreversible cessation of all functions of the entire brain, including the brainstem. If the client's heart is still beating and they can breathe on their own, it indicates preserved brainstem function, which is inconsistent with brain death criteria.
Choice B rationale
Brain death is defined as irreversible cessation of all brain functions. When a client is on life support, but their brain has sustained irreversible damage with complete loss of brainstem reflexes, they meet the criteria for brain death, allowing for organ donation consideration.
Choice C rationale
A client able to respond to stimuli and communicate with others exhibits clear signs of brain activity and consciousness. This directly contradicts the definition of brain death, which requires complete and irreversible loss of all brain function, including higher cortical functions.
Choice D rationale
While vital organs may eventually cease functioning after brain death, the initial and primary criterion for brain death is the irreversible cessation of brain function. The vital organs can often be maintained on life support for a period to facilitate organ donation, so they are not necessarily non-functioning.
Correct Answer is []
Explanation
Condition: Spasmodic croup
2 actions: Administer a single dose of oral dexamethasone; Position the child upright and provide humidified air
2 parameters: Respiratory rate and oxygen saturation; Stridor and work of breathing
Rationale for correct condition
Spasmodic croup presents in toddlers with sudden onset of nighttime barking cough without fever. It is often associated with atopy, such as eczema. The child is playful and afebrile with no daytime distress. Lungs are clear with normal oxygen saturation (98%) and respiratory rate (28/min; normal 20–40/min for toddlers). No infectious signs are present, supporting a diagnosis of spasmodic croup.
Rationale for correct actions
Oral dexamethasone reduces airway inflammation in croup and decreases symptom duration through corticosteroid-mediated cytokine inhibition. A single dose is effective in mild-to-moderate cases, reducing subglottic edema.
Positioning the child upright and using humidified air improves airflow by decreasing upper airway narrowing and soothing inflamed mucosa. It is a first-line supportive measure to alleviate nocturnal symptoms.
Rationale for correct parameters
Monitoring respiratory rate and oxygen saturation assesses oxygenation and ventilation status. Tachypnea or desaturation may signal worsening airway obstruction.
Stridor and work of breathing are key signs of upper airway compromise. Increased inspiratory effort or stridor at rest requires escalation of care.
Rationale for incorrect conditions
Respiratory syncytial virus causes wheezing, fever, and lower respiratory symptoms, which are absent here.
Epiglottitis presents with high fever, drooling, and toxic appearance, not seen in this playful child.
Acute laryngitis lacks the barking cough and is uncommon in toddlers.
Rationale for incorrect actions
Preparing for intubation is reserved for airway obstruction, which is not present.
Broad-spectrum antibiotics are ineffective in non-bacterial etiologies like croup.
Ribavirin targets RSV, which this child does not have.
Rationale for incorrect parameters
Swallowing ability and drooling assess epiglottitis, not croup.
Fever and WBC count are normal and nonspecific.
Wheezing and lung sounds assess lower airway disease, not upper airway croup.
Take-home points:
- Spasmodic croup causes nighttime barking cough without fever in toddlers.
- Differentiate from RSV (wheezing), epiglottitis (drooling), and laryngitis (hoarseness).
- Steroids and humidified air reduce symptoms in mild croup.
- Key assessments include stridor and respiratory status, not fever or wheezing.
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