https://www.selleckchem.com/products/cucurbitacin-i.html t of care, longer length of stay, and high rate of transfer to a different health care facility upon discharge. Knowledge of these outcomes is helpful in discussing the pros and cons of pursuing aggressive resuscitative interventions with patients and families. Cardiopulmonary resuscitation during hospitalization for patients who have metastatic cancer has a very poor outcome with a mortality rate of 81.77%. Inpatient cardiopulmonary resuscitation in these patients is also associated with a significantly higher cost of care, longer length of stay, and high rate of transfer to a different health care facility upon discharge. Knowledge of these outcomes is helpful in discussing the pros and cons of pursuing aggressive resuscitative interventions with patients and families.Photobleaching and photoproduct formations are considered essential phenomena in improving the efficacy of photodynamic diagnosis and therapy (PDD and PDT). We investigated the photobleaching of protoporphyrin IX (PpIX) by measuring its concentration with mass spectrometry (MS). The reduction in the concentration of PpIX dissolved in dimethyl sulfoxide was measured during PDD and PDT conditions using lasers with wavelengths of 405 and 635 nm, respectively, at a power density of 10, 50 or 100 mW/cm2 . The obtained results were compared with the results of conventional fluorescence spectroscopy and previously reported results. Our results demonstrate the variation in the MS-based photobleaching coefficient of PpIX with the power density, while the fluorescence-based photobleaching coefficient was independent of the power density. The results of MS also show faster photobleaching of PpIX in comparison with that obtained from fluorescence. The difference may be attributed to the change in the fluorescence quantum yield of PpIX with its concentration and the effect of fluorescence emission from the PpIX photoproducts. Thus, an MS-based investigation