What information should be included when labeling all specimens?

When labeling specimens, it is essential to include the patient's name, date and time of collection, and the collector's initials. This comprehensive information is crucial for several reasons.

First, the patient's name ensures that the specimen is correctly identified and matched to the right individual. This is vital to prevent mix-ups, which can lead to misdiagnosis or inappropriate treatment.

Second, including the date and time the specimen was collected helps in tracking the sample’s age, which is important for certain tests that may be time-sensitive. Understanding when a specimen was taken can also provide context concerning the patient's medical condition or treatment regimen at that particular time.

Lastly, the collector's initials add another layer of accountability and traceability. This allows healthcare providers to verify who collected the sample, which can be important in cases where questions about the collection process arise.

In contrast, options that include only the patient's name, the date and time alone, or just the collector's initials lack critical information that can compromise the specimen's integrity and the accuracy of test results. Hence, the comprehensive approach represented in the correct answer is necessary for effective patient care and laboratory practices.