Pain management, listed as the fifth vital sign, has gained increasing attention from clinicians. Conventional analgesics have limited duration, leading to intense monitor and frequent dosing during the early phase in order to prevent the progression of chronic pain. Thus, prolonging the duration of analgesics has become one focus of the pain research. Several strategies, such as adding adjuvants, producing derivatives, and applying extended-release carriers, make it possible for super long-acting analgesics to come into reality. This review briefly introduces the strategies and development of the super long-acting analgesics, including the successful translation and commercialization of the present products of super long-acting analgesics. It also summarizes the application and translation of extended-release drug carriers, providing invaluable reference for the future research on the field of super long-acting analgesics.

During the COVID-19 epidemic, our national guidelines have suggested that surgical patients should wear a mask to decrease the potential transmission of COVID-19 in the operating room, as long as the condition allows. However, so far, there is no study to discuss the influence of wearing a mask on the ventilation and blood oxygenation status in patients of spontaneous breathing with supplementary oxygen through an anesthetic facemask. This is a before-after study in the same patient, and 10 healthy volunteers were recruited, by testing the arterial blood gas parameters at key time points before and after oxygen inhalation to evaluate the effects of two different supplementary oxygen methods ('disposable medical mask + anesthetic facemask' and 'anesthetic facemask only') on the oxygenation of subjects. Our data demonstrated whether wearing a disposable medical mask or not could effectively increase the oxygen supply of the subjects compared with the basic value before oxygen inhalation; however, compared with the group without mask, the arterial oxygen partial (PaO
COVID-19 ; Healthy Volunteers ; Humans ; Masks ; Oximetry ; Oxygen/blood*