Monday, February 24, 2020

Discussion the physics of collisions Essay Example | Topics and Well Written Essays - 1000 words

Discussion the physics of collisions - Essay Example This paper will use information from the statements recorded to prove, both theoretically and scientifically, that it was not Sandy Dayton fault that the accident happened. It will also confirm that Sunday Dayton was not speeding before the crash occurred. From the Accident Investigators report, the 1988 Chevrolet cargo van had hit Sandys 1978 Ford Mustang from the rear. Secondly, both vehicles had skidded on braking before the crash, with Sandys car making a 90 feet skid mark while the Cargo van slid for 45 feet. The 1978 Ford Mustang was pushed 30 feet into the intersection after the crash. The kinetic friction coefficient was determined to be 0.59 using a drag sled. The weight of Sandys car was 2700 lbs while that of the cargo van was not reported. West Trenton speed limit is 35mph. This paper will use this data to determine the speeds of both vehicles before the drivers hit the brakes. This speed will show which of the two vehicles was speeding before the accident. Analysis of skid marks is essential in an auto accident reconstruction in estimating the speed of the car exactly before the driver hit the brakes. A simple friction model is used, provided the information on the cars tires, and the surface of the road is provided (Bohan, Damask, and Bee). In this case, the accident investigator provided us with the kinetic friction coefficient between the surface of the road and the tires, given as 0.59. Since both vehicles were initially in motion, the Kinetic Energy approach will be used to determine the work done to bring the car to a stop. The Kinetic energy K due to the motion of the car of mass m and speed v is given by; Kinetic energy was converted to heat energy in the tires, the road, and the air when the car skidded to a stop. This conversion is as a result of the work of Friction W. Work done is given by force f

Saturday, February 8, 2020

Nursing care during Primary Angioplasty Essay Example | Topics and Well Written Essays - 1750 words

Nursing care during Primary Angioplasty - Essay Example Details to be collected typically include – onset duration progress of cardiac symptoms, similar complaints in the past, any other major illnesses like diabetes, hypertension, medicines with dosage, previous surgeries, any allergies, etc. Details are provided to the respective physician and orders noted accordingly. Meanwhile the patient and the relatives are provided counseling and assurance. Coronary Angioplasty is planned in this patient to widen the occluded coronary artery. These arteries supply blood and oxygen to the heart muscles. These arteries get occluded due to fatty tissue or atheroma resulting in reduced blood supply to the heart causing chest pain. Angioplasty is performed to open up the blocked vessels by compressing fatty tissue against anterior coronary vessel wall. This procedure helps to improve blood flow through the vessels to the heart muscles and helps in relieving chest pain. Also, this procedure is advised when - a. Medicines like calcium channel bloc ker, beta adnergic blockers or nitrates fail to correct coronary heart disease symptoms (NICE technology appraisal guidance 71) or b. There is recurrence of chest pain post CABG (Coronary Artery Bypass Graft surgery). Coronary angioplasty can be planned procedure or an emergency procedure in the case of heart attack and unstable chest pain with acute myocardial infarction. (Coronary Angioplasty and Stents) This operation is performed either through radial artery or femoral artery. Radial route is more popular in recent times because radial artery is easily accessible and palpable. Its superficial location makes it easy to compress to achieve homeostasis later on. Normal Allen’s test ensures dual blood supply to hand. So in case of bruise to radial artery or radial blood flow shunt, hands will still receive perfusion through Ulnar artery without feeling any damage. There is less chance of nerve injury in radial method. This approach provides comfort to the patient as it allows them ability to mobilize. It is easier for the patient to notice and control any bleeding from the radial incision, the femoral artery lies deeper in leg, so compressing the artery is difficult and by the time hematoma is noted bleeding would be significant. Radial artery method is cost effective too. (Radial Approach to Cardiac Catheterisation). Coronary Angiography is performed with the Angioplasty in an emergency. Angiogram allows doctor to look inside coronary arteries and find out how severe and where the narrowed areas are. (Coronary Angioplasty and Stents) Patient is advised what medicines to be avoided on the day of the procedure, such as aspirin or any anti coagulant, which medicines should be stopped few days before the procedure and what additional medicines need to be taken. He/she is also informed about the details of the procedure along with the effect of anesthetic drugs during and after the procedure. Doctor explains about the nature of pain the patient may have. Nu rsing staff ensures that patient would not eat or drink anything 4 -5 hours before the procedure. Proper consent is taken from the patient and relatives informing them about the complication involved in it. Nursing staff prepares the patient for the procedure by checking