Which of the following samples is used to measure blood pH and blood gases?

A. 1: Checking the medication order against the label only once is insufficient for ensuring accuracy.
B. 2: While checking twice is better than once, the standard practice is to check three times for maximum accuracy.
C. 3: The "three checks" method involves checking the medication order against the label at three key points: when selecting the medication, when preparing it, and before administering it to the patient.
D. 4: Checking four times is not a standard practice and could be excessive; three checks are considered sufficient.

A. Physicians' Desk Reference: The Physicians' Desk Reference (PDR) provides drug information and is not used for diagnostic coding. It includes details about medications, such as their uses, dosages, and side effects.
B. CPT manual: The CPT (Current Procedural Terminology) manual is used to find codes for procedures and services provided by healthcare professionals, not diagnostic codes.
C. HCPCS: The Healthcare Common Procedure Coding System (HCPCS) is primarily used for coding supplies, equipment, and services not included in the CPT manual. It is not used for diagnostic coding.
D. ICD-10-CM coding manual: The ICD-10-CM (International Classification of Diseases, 10th Revision, Clinical Modification) manual is the correct reference for finding diagnostic codes, including those for arteriosclerotic heart disease.