1. Right Answer: A
Explanation: (A) This is the correct method of teaching diaphragmatic breathing, which allows full lung expansion to increase oxygenation, prevent atelectasis, and move secretions up and out of the lungs to decrease risk of pneumonia. (B) Quick, short breaths do not allow for full lung expansion and movement of secretions up and out of the lungs. Quick, short breaths may lead to O2 depletion, hyperventilation, and hypoxia. (C) Expelling breaths through the nose does not allow for full lung expansion and the use of diaphragmatic muscles to assist in moving secretions up and out of the lungs. (D) Inhaling and exhaling at a rate of 2024 times/min does not allow time for full lung expansion to increase oxygenation. This would most likely lead to O2 depletion and hypoxia.
2. Right Answer: C
Explanation: (A) A rigid, boardlike abdomen is an assessment finding indicative of placenta abruptio. (B) A cause of postbirth hemorrhage is uterine atony. With placenta previa, uterine tone is within normal range. (C) The placenta is located directly over the cervical os in complete previa. Blood will escape through the os, resulting in the uterus and abdomen remaining soft and relaxed. (D) In placenta abruptio, hypertonicity of the uterus is caused by the entrapment of blood between the placenta and uterine wall, a retroplacental bleed. This does not exist in placenta previa.
3. Right Answer: A
Explanation: (A) Based on the clients history, presence of bright red vaginal bleeding, and hemoglobin value on admission, the priority nursing diagnosis would be decreased cardiac output related to excessive bleeding. (B) This nursing diagnosis is a potential problem that does not exist at the present time, and therefore is not the priority problem. (C) The clients expressed anxiety is for her child. The fetus will remain physiologically safe if the decreased cardiac output is resolved. (D) Initial spontaneous bleeding with placenta previa is rarely life threatening to the mother or the fetus. Delivery of the fetus will be postponed until fetal maturity is achieved and survival is likely.
4. Right Answer: D
Explanation: (A) Dinitrophenylhydrazine is a laboratory test used to detect phenylketonuria, maple syrup urine disease, and Lowes syndrome. (B) Metachromatic stain is a laboratory test that may be used to diagnose Tay-Sachs and other lipid diseases of the central nervous system. (C) The blood serum phenylalanine test is diagnostic of phenylketonuria and can be used for wide-scale screening. (D) A lecithin-sphingomyelin ratio of at least 2:1 is indicative of fetal lung maturity, and survival of the fetus is likely.
5. Right Answer: B
Explanation: (A) These nursing actions are necessary prior to the cesarean section, but not immediately necessary to maintain physiological equilibrium. (B) Determining the physiological status of the fetus would constitute the highest priority in evaluating and maintaining fetal life. (C) These nursing actions are necessary prior to the cesarean section, but not immediately necessary to maintain physiological equilibrium. (D) These nursing actions are necessary prior to the cesarean section, but not immediately necessary to maintain physiological equilibrium.
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