1.ง่าย
กฎเลขเก้า (rule of nines) ใช้ประมาณ:
- Aจำนวนครั้งในการหายใจต่อนาที
- Bความลึกของแผลไฟไหม้ วัดเป็นมิลลิเมตรของผิวหนัง
- Cร้อยละของพื้นที่ผิวร่างกายที่ถูกไฟไหม้น้ำร้อนลวก
- Dของเหลวที่สูญเสียจากการอาเจียน
2.ง่าย
Why are patients having chemotherapy at increased risk of infection?
- AChemotherapy stops the patient from sweating
- BChemotherapy suppresses the bone marrow and lowers the white cell count
- CChemotherapy makes the skin thicker
- DChemotherapy raises the white cell count too high for it to work properly
3.ง่าย
On a drug chart, "PRN" means a medicine is given:
- AAt night
- BOnce only
- CWhen required
- DEvery morning
4.ปานกลาง
Which rule is essential for safe use of patient-controlled analgesia (PCA)?
- AThe button should be pressed before each meal
- BThe nurse should press it every hour
- CRelatives should press it while the patient sleeps
- DOnly the patient should press the button
5.ปานกลาง
Which is a recognised risk factor for postoperative nausea and vomiting?
- ABeing a smoker
- BA short operation under local anaesthetic
- CBeing male
- DUse of opioids after surgery
6.ปานกลาง
A patient with DKA has an arterial blood gas showing a low pH and a low bicarbonate. Which disturbance is this?
- AMetabolic alkalosis
- BMetabolic acidosis
- CRespiratory acidosis
- DRespiratory alkalosis
7.ยาก
A potassium result of 6.9 mmol/L comes back on a well patient with a normal ECG, and the laboratory reports that the sample was haemolysed. What is the best action?
- AIgnore the result because the patient looks well and the ECG is normal
- BStart a potassium supplement
- CGive IV insulin and glucose straight away
- DRepeat the blood test promptly, as haemolysis can falsely raise potassium
8.ยาก
A patient with a confirmed pulmonary embolism is started on anticoagulation. Which statement best explains its purpose?
- AIt stops the clot growing and prevents new clots while the body breaks it down
- BIt thins the blood so that the lungs absorb more oxygen
- CIt dissolves the clot completely within minutes of the first dose being given
- DIt is mainly given to lower the blood pressure
เฉลย
- 1. C · ร้อยละของพื้นที่ผิวร่างกายที่ถูกไฟไหม้น้ำร้อนลวก
- 2. B · Chemotherapy suppresses the bone marrow and lowers the white cell count
- 3. C · When required
- 4. D · Only the patient should press the button
- 5. D · Use of opioids after surgery
- 6. B · Metabolic acidosis
- 7. D · Repeat the blood test promptly, as haemolysis can falsely raise potassium
- 8. A · It stops the clot growing and prevents new clots while the body breaks it down
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