Non-invasive real-time monitoring of skin flap in mouse model using laser speckle imaging modality
APPLICATIONS OF DIGITAL IMAGE PROCESSING XLII
Authors: Im, Jinhyuck; Yu, Hyunseon; Kim, Jihoon; Jung, Byungjo
Abstract
Skin necrosis may occur due to no blood circulation after skin grafting. In present, it may not be easy to make sure that the blood is normally circulated to the trans implanted skin flap. A real-time laser speckle imaging modality (LSIM) developed in our laboratory was utilized to evaluate early skin necrosis. Two experiments were performed: 1) in-vitro optical tissue phantom (OTP) experiment to quantitatively identify the feasibility of blood flow variation; 2) in-vivo animal skin flap surgery experiment to induce skin necrosis in mouse. In comparison of laser speckle images (spatial and temporal speckle contrast analysis) and color images after skin flap surgery, laser speckle image resulted in better efficiency in evaluating skin necrosis than the color image. In laser speckle images, the temporal contrast image was more efficient than spatial contrast image in evaluating skin necrosis. In conclusion, it may be useful employing the real-time LSIM in noninvasively evaluating blood flow variation in skin necrosis.
EVALUATION OF THE POLICE OPERATIONAL TACTICAL PROCEDURES FOR REDUCING OFFICER INJURIES RESULTING FROM PHYSICAL INTERVENTIONS IN PROBLEMATIC ARRESTS. THE CASE OF THE MUNICIPAL POLICE OF CADIZ (SPAIN)
INTERNATIONAL JOURNAL OF OCCUPATIONAL MEDICINE AND ENVIRONMENTAL HEALTH
Authors: Vera Jimenez, Jose Carlos; Fernandez, Francisco; Ayuso, Jesus; Lorente Acosta, Jose Antonio
Abstract
Objectives: This paper describes some operational tactical procedures (OTP) and discusses the results of a 14-year-long study, spanning the period 2003-2016, conducted by the Municipal Police of Cadiz, Spain, which comprised 3 time periods: 2003-2006, when the officers were trained in traditional policing procedures; 2007-2013, when the officers were taught an innovative set of OTP in the form of a basic set of self-defense and arrest mechanisms, different from the traditional policing procedures that rely on martial arts and combat sports; and finally 2014-2016, when the OTP training was discontinued. The aim of this study was to improve policing and reduce officer injuries resulting from interventions in controversial or violent situations, such as problematic arrests. Material and Methods: The study involved 162 police officers and commanders of the Municipal Police of Cadiz, who were in street duty for their first time. There were 8 females and 154 males aged 24-55 years. Three OTP stages are shown as examples. Results: Based on the analysis of "training hours" and "physical interventions in problematic arrests," the results were: 1) the number of sick leaves in the police was identical according to the number of arrests, and 2) data on sick leaves show remarkable differences among the 3 periods under analysis. Conclusions: The OTP-based training substantially reduced officer sick leaves. The overall reduction in sick leaves in the period 2007-2013 was observed that cannot be ascribed to a decrease in criminal acts, and hence in police physical interventions.