A nurse is caring for a client ordered ceftazidime 1g IM every 6 hours. The drug comes in a vial with a powder which is reconstituted with 3mL of sterile water for a final concentration of 280 mg/mL. How many mi. will be drawn into the syringe for the dose ordered? Do not use leading zero (Round to the tenth)
The Correct Answer is ["3.6"]
Given:
Desired dose: Ceftazidime 1 g IM every 6 hours
Available concentration: Ceftazidime 280 mg/mL
To find:
Volume to administer (in mL)
Step 1: Convert desired dose to milligrams
1 gram (g) is equal to 1000 milligrams (mg).
Multiply by 1000:
Desired dose (mg) = Desired dose (g) x 1000
Desired dose (mg) = 1 g x 1000 = 1000 mg
Step 2: Set up the proportion
We can use the following proportion to solve the problem:
(Desired dose) / (Available concentration) = Volume to administer
Step 3: Substitute the values
Plugging in the given values, we get:
(1000 mg) / (280 mg/mL) = Volume to administer
Step 4: Simplify
To simplify, we can invert the denominator and multiply:
(1000 mg) x (1 mL / 280 mg) = Volume to administer
The "mg" units cancel out, leaving us with:
(1000 x 1 mL) / 280 = Volume to administer
Step 5: Calculate
Performing the multiplication and division, we get:
1000 mL / 280 = Volume to administer
3.57 mL ≈ Volume to administer
Step 6: Round to the nearest tenth
3.6mL
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is C
Explanation
A) Goodell’s sign:
Goodell's sign refers to the softening of the cervix that occurs early in pregnancy, typically around 4–6 weeks. It is a probable sign of pregnancy due to increased vascularity and hormonal changes. However, it does not describe the movement of the fetus or the sensation felt by the provider when pressure is applied to the cervix.
B) Lightening:
Lightening refers to the sensation of the fetus dropping or descending into the pelvic cavity, which typically happens in the later stages of pregnancy (around 36 weeks or later). It is not related to the fetal movement felt by the provider through upward pressure on the cervix, but rather to the physical repositioning of the fetus as it prepares for labor.
C) Ballottement:
Ballottement is the correct term for the movement of the fetus that can be felt by the provider when upward pressure is applied to the cervix. This technique involves a gentle tapping or pushing on the cervix, causing the fetus to rise and then "bounce" back. This is a probable sign of pregnancy, typically noticeable between 16 and 18 weeks gestation.
D) Chadwick's sign:
Chadwick’s sign refers to the bluish discoloration of the cervix, vagina, and vulva due to increased blood flow and is often an early sign of pregnancy. It does not relate to the movement of the fetus felt by the provider, but rather to changes in the color of the genital tissues.
Correct Answer is B
Explanation
A) Flexion:
Flexion is a movement where the fetal head bends forward during labor, which allows the smallest diameter of the head to pass through the birth canal. It is an important part of the labor process but does not refer to the initial descent of the fetus into the pelvis. Flexion typically occurs once the fetus begins to descend into the pelvis.
B) Engagement:
Engagement refers to the initial descent of the fetal head into the pelvis and the passage of the largest part of the fetal head (the biparietal diameter) into the maternal pelvis. This occurs when the fetal head reaches zero station at the level of the ischial spines and is the first cardinal movement of labor. It marks the point at which the presenting part of the fetus enters the pelvic inlet and begins the process of descent.
C) Extension:
Extension is the movement of the fetal head as it exits the birth canal after engagement and descent. The head moves from a flexed position (chin to chest) to an extended position (chin moving away from the chest) as it passes through the birth canal. This movement occurs after engagement and is a part of the expulsion phase, not the initial descent.
D) Expulsion:
Expulsion is the final phase of labor, which occurs after the fetal head has been delivered. It involves the delivery of the rest of the body (shoulders, torso, and legs) following the birth of the head. This is the final cardinal movement, which takes place after engagement, descent, flexion, internal rotation, extension, and external rotation.
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