An intelligent system for detecting errors and determining failure modes operates on an absorbance spectrum of in vivo skin tissue. Application of the system results in improved prediction accuracy through rejection of invalid and poor samples. System components include a noninvasive blood glucose meter,...http://www.google.com/patents/US6788965?utm_source=gb-gplus-sharePatent US6788965 - Intelligent system for detecting errors and determining failure modes in noninvasive measurement of blood and tissue analytes