A medical assistant notes the abbreviation "NS" next to several appointments from the previous day's office schedule. Which of the following is the correct description of this abbreviation?

A. C-reactive protein (CRP): CRP is typically tested using a serum sample collected in a gold or red-top tube, not a light blue tube.
B. Partial thromboplastin time (PTT): PTT is a coagulation test that requires a light blue top tube containing sodium citrate, which acts as an anticoagulant. This tube is specifically used for coagulation studies.
C. Glucose: Glucose levels are commonly measured using a gray-top tube containing sodium fluoride to inhibit glycolysis, not a light blue tube.
D. Lactate: Lactate levels are typically measured using a gray-top tube or green-top tube, depending on the specific protocol, not a light blue tube.

A. Perform orthostatic blood pressure. Orthostatic blood pressure measurements are used to assess changes in blood pressure when a patient moves from lying down to standing, not in response to emotional upset.
B. Recheck the blood pressure after a few minutes. This is the correct action, as the initial elevated reading could be due to the patient's emotional state. Waiting a few minutes and rechecking can provide a more accurate reading.
C. Measure blood pressure at the wrist. Wrist blood pressure readings are less accurate than those taken at the upper arm and are not recommended in this scenario.
D. Use the palpatory method for blood pressure. The palpatory method is used when auscultation is difficult, but it does not address the issue of an elevated reading due to emotional upset.