Comparison of Three Methods of Hemoglobin Monitoring

Comparison of Three Methods of Hemoglobin Monitoring in Patients Undergoing Spine Revision or Hip Revision Surgery.

The purpose of this study is to compare the hemoglobin results obtained with 1) the HemoCue™, 2) the Masimo SpHb™, and 3) the UCSF Clinical Laboratory. The goal is to determine if these three values differ from each other during various levels of blood loss in the clinical care of patients for spine revision and hip revision surgery.

See above

Inclusion Criteria:

• Male or non-pregnant female 18 y/o or older
• American Society of Anesthesiology Classification 1, 2 or 3
• Scheduled to undergo spine or hip revision surgery

Exclusion Criteria:

• Pregnant or nursing
• Patients who in the study investigators clinical judgement would not be suitable for research.