Cellular membranes harbor receptors, ion channels, lipid domains, lipid signals, and scaffolding complexes, which function to maintain cellular growth, metabolism, and homeostasis. Moreover, abnormalities in lipid metabolism attributed to genetic changes among other causes are often associated with diseases such as cancer. Thus, there is a need to comprehensively understand molecular events occurring within and on membranes as a means of grasping disease etiology and identifying viable targets for drug development. The lipid bilayer has a highly polarized structure that consists of a central hydrocarbon core and two flanking interfacial regions that are highly dynamic and may contain >10,000 different lipids. This dynamic variety of glycerolipids, sphingolipids, and sterols in the membrane organelles provide spatial and temporal architecture to direct signaling processes through target proteins. The central lipid bilayer viewed as a hub for biological interactions can serve an integral role in biochemistry education. To increase what has traditionally been an underserved area of biochemical education, we have designed a lipid‐based curriculum for the undergraduate classroom and laboratory. An overview of the curriculum and laboratory experiments will be given.
ObjectivesTo compare the pre-hospital treatment and intervention regimen for major trauma patients with comparable injury patterns between Austria (AUT) and Germany (GER). Patients and MethodsThis analysis is based on data retrieved from the TraumaRegister DGU®. Data included severely injured trauma patients with an Injury Severity Score (ISS) ≥ 16, an age ≥ 16, and who were primary admitted to an Austrian (n=4.186) or German (n=41.670) Level I Trauma Center from 2008 to 2017. Endpoints included pre-hospital times and interventions performed until final hospital admission. The analyzed data include patients’ demographics, mode of transportation, pre-hospital time management, hemodynamic stability, and various pre-hospital interventions.ResultsThe cumulative time for transportation from the site of accident to the hospital did not significantly differ between the countries (62 min. in AUT, 65 min. in GER). Overall, 53% of all trauma patients in AUT were transported to the hospital with a helicopter compared to 37% in GER (P<0.001). The rate of intubation - 48% in both countries, the number of chest tubes placed (5.7% GER, 4.9% AUT), and the frequency of administered catecholamines (13.4% GER, 12.3% AUT) was comparable (Φ=0.00). Hemodynamic instability upon arrival in the TC was higher in AUT, (20.6% vs. 14.7% in GER; P<0.001). A median of 500mL of fluid was administered in AUT, whereas in GER 1000mL were infused (P<0.001). Patient demographics did not reveal a relationship (Φ=0.00) and the majority of patients sustained a blunt trauma (96%). ConclusionA significant higher number of Helicopter EMS transports (HEMS) were carried out in AUT. This can be explained by the overall lack of a unified transport algorithm. The authors suggest implementing an international guideline to explicitly use the HEMS system for trauma patients only a) for the rescue/care of people who have had an accident or are in life-threatening situations, b) for the transport of emergency patients with ISS>16, c) for transport of rescue personnel to hard-to-reach regions or, d) for the transport of medicinal products. Further, the amount of administered fluid in the pre-clinical setting should follow the concept of permissive hypotension/ hypotensive resuscitation, however the data are still inconclusive and mandate further research.
The incidence of an acute compartment syndrome (ACS) of the thigh is less than 1%. It is most common in the setting of muscle overuse or muscle injury, as well as secondary to trauma, such as a femoral fracture. We present a case of an ACS in a young, healthy, and semiprofessional athlete with normal coagulation who sustained an acute stress fracture of the distal femur. After the initial fracture osteosynthesis, the patient suffered from a compartment syndrome in the right anterior aspect of the distal thigh. Following rapid surgical fasciotomy, the case was uneventful, and he returned to his preinjury sport level without any neurological consequences. This case confirms that ACS in the thigh is rare, but mainly occurs in young males with a large muscle mass due to participation in various athletic programs. We hypothesize that constant muscle over-usage primes for a larger amount of contused and protruding muscle mass in the small femoral compartment. Hence, the fatigued muscle subjects the bone to an increased mechanical force resulting in an overloading process. This ensues the accumulation of femoral microfractures and primes for the occurrence of an increased rate of stress fractures and an ACS in the thigh.
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