Major Metropolitan Area COVID-19 - Positive Patients Undergoing Emergency and Elective Orthopaedic Surgeries: A Case-matched Control Study.

The SARS-CoV-2 pandemic affected surgical management in Orthopaedics. This study explores the effect of COVID-19-positive patients on time to surgery from admission, total time spent in preoperative preparation, costs of orthopaedic care, and inpatient days in COVID-19-positive patients. The authors' case-matched study was based on the surgeon, procedure type, and patient demographics. The authors reviewed 58 cases, 23 males and 35 females. The results for the COVID-19-positive and -negative groups are time to admission (362.9; 388.4), time in preparation (127.8; 122.3), inpatient days to surgery (0.2; 0.2), and orthopaedic cost ($81,938; $86,352). With available numbers, no significant difference could be detected for inpatient days until surgery, any associated time to surgery, or orthopaedic costs for operating on COVID-19-positive patients during the pandemic. Perceived increased time and cost of care of COVID-19-positive patients were not proven in this study. (Journal of Surgical Orthopaedic Advances 33(1):014-016, 2024).

Expert camouflage-breakers can accurately localize search targets.

Camouflage-breaking is a special case of visual search where an object of interest, or target, can be hard to distinguish from the background even when in plain view. We have previously shown that naive, non-professional subjects can be trained using a deep learning paradigm to accurately perform a camouflage-breaking task in which they report whether or not a given camouflage scene contains a target. But it remains unclear whether such expert subjects can actually detect the target in this task, or just vaguely sense that the two classes of images are somehow different, without being able to find the target per se. Here, we show that when subjects break camouflage, they can also localize the camouflaged target accurately, even though they had received no specific training in localizing the target. The localization was significantly accurate when the subjects viewed the scene as briefly as 50 ms, but more so when the subjects were able to freely view the scenes. The accuracy and precision of target localization by expert subjects in the camouflage-breaking task were statistically indistinguishable from the accuracy and precision of target localization by naive subjects during a conventional visual search where the target 'pops out', i.e., is readily visible to the untrained eye. Together, these results indicate that when expert camouflage-breakers detect a camouflaged target, they can also localize it accurately.

I SPY WITH MY LITTLE EYE: WHAT VISUAL SEARCH CAN TELL US ABOUT HOW WE SEE THE WORLD.

We have all have experienced the frustration of looking for something we want, only to find a seemingly endless series of things we do not want. This process of looking for an object of interest is called visual search. We perform visual search all the time in everyday life, because the objects we want are almost always surrounded by many other objects. But, in some cases, it takes special training to find things, such as when searching for cancers in X-rays, weapons or explosives in airport luggage, or an enemy sniper hidden in the bushes. Understanding how we search for, and find, objects we are looking for is crucial to understanding how ordinary people and experts alike operate in the real world. While much remains to be discovered, what we have learned so far offers a fascinating window into how we see.