A nurse is caring for a client who is postpartum. Which of the following findings is an indication for the nurse to administer Rho(D) immune globulin?

Choice A rationale:
0.25 mL - The nurse should not administer 0.25 mL because the available concentration of vitamin K injection is 1 mg/0.5 mL. To achieve the prescribed dose of 1 mg, administering only 0.25 mL would be insufficient.
Choice B rationale:
0.5 mL - This is the correct choice. The nurse should administer 0.5 mL of the vitamin K injection to deliver 1 mg of vitamin K, as the concentration of the injection is 1 mg/0.5 mL. By giving the full 0.5 mL, the newborn will receive the appropriate 1 mg dose.
Choice C rationale:
0.75 mL - Administering 0.75 mL would be excessive for the prescribed 1 mg dose of vitamin K. It is unnecessary to give a higher volume than required, as it could lead to potential adverse effects or wastage.
Choice D rationale:
1 mL - Similarly, administering the entire 1 mL of the vitamin K injection would result in doubling the prescribed dose, leading to potential overdose and adverse reactions. The nurse should avoid administering more than the necessary 0.5 mL.

The cervix is dilated 3 cm: This indicates the width of the cervical opening, which is 3 cm wide.

It is effaced 30%: This means the cervix has effaced or thinned out by 30%, indicating how much the cervix has shortened and thinned in preparation for labor.

The presenting part is 1 cm above the ischial spines (indicated by the negative number, -1): This measurement shows the position of the baby's head in relation to the ischial spines of the pelvis. In this case, the baby's head is 1 cm above the ischial spines.
Option A ("The cervix is dilated 3 cm, it is effaced 30%, and the presenting part is 1 cm below the ischial spines."): This option incorrectly interprets the baby's position as being 1 cm below the ischial spines, which is not the case. The negative sign (-1) in the documentation indicates that the presenting part is 1 cm above the ischial spines.

Option B ("The cervix is effaced 3 cm, it is dilated 30%, and the presenting part is 1 cm above the ischial spines."): This option switches the interpretation of dilation and effacement. In the original documentation, the dilation is given as 3 cm, while effacement is 30%. This option incorrectly states that effacement is 3 cm and dilation is 30%. Additionally, it correctly identifies the presenting part's position.

Option C ("The cervix is effaced 3 cm, it is dilated 30%, and the presenting part is 1 cm below the ischial spines."): This option correctly interprets effacement and dilation but incorrectly states that the presenting part is 1 cm below the ischial spines. The original documentation indicates that the presenting part is 1 cm above the ischial spines, as denoted by the negative sign (-1).