test results. The difference in capillary bed concentration and blood perfusion
throughout the body can lead to sample site-to-site differences in blood glucose
results. These physiological effects vary between individuals and can vary within a
single individual based upon his or her behavior and relative physical condition.
Our studies involving alternate site testing of adults with diabetes show that most
persons will nd their glucose level changes more quickly in the ngers’/palms’ blood
than the alternate sites’ blood.* This is especially important when glucose levels are
falling or rising rapidly. If your patient is used to making treatment decisions based
upon ngertip/palm readings, he or she should consider the delay, or lag-time,
affecting the results obtained from an alternate site.
* Data on le.
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