Plato's Allegory of the Cave Essay Example | Topics and Well Written Essays - 250 words - 1

Plato's Allegory of the Cave - Essay Example This is because we are being told lies every minute of our lives. Currently people are chained to a wall known as stereotypes. We are made to believe that the stereotypes we see in the media are precisely the same in reality, something which is not true. Most ignorant individuals have it that every Muslim is a terrorist .Generally, most people falsely believe that all American lasses are full figured idealists, Asians are quite smart, the Irish take Guinness the whole day, Canadians dwell in igloos, Mexicans are field laborer and Jamaicans are forever high. Most Americans currently think that anybody hailing from Middle East is a suicide bomber or a Muslim terrorist. The media which is the inferno behind us is portraying these stereotypes with ignorance fueling the inferno. People therefore, have to break free from the wall, get past the inferno and out of the cave to really observe things as they are in reality (Hanly, 2007). People thus, need to re-educate themselves on what they should believe about various nationalities as well as cultures surrounding us. Breaking free form the wall will allow us to view people for their individual characters and who they really are, instead of some ill thought of stereotypical

Contrast Media and Intravenous Urography

Contrast Media and Intravenous Urography Introduction The practice of clinical diagnostic radiology has been made possible by advances not only in diagnostic equipment and investigative techniques, but also in the contrast media that permit visualisation of the details of the internal structure or organs that would not otherwise be demonstrable. The remarkably high tolerance of modern contrast media has been achieved through successive developments in chemical pharmacological technology. A single dose of X-ray contrast medium commonly contains upwards of 2000 times as much iodine as in the total physiological body content, and yet it is cleared from the system rapidly and naturally, usually with no adverse effects at all. The choice of contrast medium has always been a matter of debate, but is ultimately the responsibility of the radiologist. In order to be able to make a rational decision as to the selection of contrast media, it is necessary to have some understanding of the physical and physiological principles involved. The objective is to provide a background for non-specialists on this complicated specialist subject. Why contrast media are necessary Different tissues within the body attenuate the beam of X-rays to different degrees. The degree of attenuation of an X-ray beam by an element is complex, but one of the major variables is the number of electrons in the path of the beam with which it can interact. The number of electrons in the path of the beam is dependent upon three factors: The thickness of the substance being studied Its density The number of electrons per atom of the element (which is equal to its atomic number) In a complex mixture of elements, which is of course what we are concerned with in the organs of a patient, the degree of attenuation is particularly influenced by the average of the atomic numbers of all the atoms involved. Where there is a considerable difference between the densities of two organs, such as between the solid muscle of the heart and the air in the lungs, then the outlines of the structures can be visualised on a radiograph because of the natural contrast that exists. Similarly, if there is a difference between the average atomic numbers of two tissues, such as between soft tissues, which are composed of elements of low atomic number, and bone, which is partly composed of the element calcium, with a rather higher atomic number, then the outlines of the different structures can be seen by natural contrast. However, if the two organs have similar densities and similar average atomic numbers, then it is not possible to distinguish them on a radiograph, because no natura l contrast exists. This situation commonly occurs in diagnostic radiography, so that, for example, it is not possible to identify blood vessels within an organ, or to demonstrate the internal structure of the kidney, without artificially altering one of the factors mentioned earlier. Two of the factors important in organ contrast can be artificially altered, the density of an organ, and, more usefully, the average atomic number of a structure. The density of a hollow organ can be reduced by filling it with gas or air, providing negative contrast. This is mainly of historical significance, but is still used when, for example, gas is introduced into the stomach or colon during a double-contrast barium examination. The average atomic number of hollow structure such as a blood vessel can be increased by filling the cavity with a liquid of much higher average atomic number (such as iodine containing contrast medium) than that of blood. In fact this is the principle by which contrast media consist of solutions or suspensions of non-toxic substances that contain a significant proportion of elements of high atomic number, usually iodine. EXAMINATION USE CONTRAST MEDIA common are described below. It should be noted that the volume, strength, as well as the type of contrast medium, will vary between patients according to the examination type and radiologists requirements. 1. Angiography Angiography is the general term which describes the investigation of blood vessels. Usually a distinction between arteriography and venography is made, depending on the kind of blood vessel (artery or vein) which is examined. Arteriography In arteriography a contrast medium is introduced via a catheter into an artery, which makes the lumen of that vessel opaque to X-rays. The natural flow of blood carries the contrast medium peripherally, and by taking a series of radiographs the radiologist can obtain images akin to a road map of the blood supply to an organ, or a limb. Localised narrowing or obstruction of an artery or a pathological circulation in a tumour can then be identified. Sometimes the radiologist may then proceed to treat the patient using the catheter system, which was introduced initially for diagnosis. Arteriography is relatively time consuming for the radiologist depending on the complexity,  ½ hour 2 hours, or even longer can be spent on the procedure. Venography (phlebography) The natural flow of blood in veins is towards the heart, and by injection of a contrast medium into a peripheral vein, a map of the venous drainage of a limb can be obtained. The larger size and greater number of peripheral veins, and the fact that the flow of blood is much slower in veins than in arteries,means that it is usual for the radiologist to take several radiographs of each area with the limb in different positions. The commonest indication for venography is to confirm a suspected diagnosis of deep venous thrombosis of the leg. Venography is also performed on organs within the body by introducing a catheter into a peripheral vein and manipulating it into an organ. Digital subtraction angiography (DSA) A special type of angiography is digital subtraction angiography (DSA). These procedures involve the use of specialised electronic equipment, computing and radiographic hardware to produce rapid sequential images. The DSA image is produced by electronically subtracting images without contrast media from images after contrast media injection. The result of this subtraction process is the visualisation of contrast filled vessels which are free from the distraction of overlying structures. 2. Intravenous urography (IVU), intravenous pyelography (IVP) When injected intravenously, most contrast media are rapidly excreted by the kidneys, and a series of radiographs taken after the injection will demonstrate the urinary tract. Intravenous urography is still the basic radiological examination of the urinary tract. The main indication is to assess the morphology of the kidneys. Further indications are: detection of kidney stones and calcifications in the ureter or bladder, assessment of obstructed urinary flow and investigation of patients with haematuria (the passage of blood in urine). Children may be investigated for congenital abnormalities of the urinary tract. In recent years for some investigations of the urinary tract, particularly uncomplicated infection, an ultrasound examination and plain abdominal radiograph have replaced intravenous urography as the initial investigation of the urinary tract. 3. Computed tomography (CT) Since 1973 an imaging technique known as computed tomography (CT) has developed to become one of the most important radiological examinations in the industrialised countries. CT uses conventional X-rays in a thin nondivergent beam to produce cross sectional images of the body. The X-ray tube and an array of detectors mounted within a supporting framework, rotate round the patient with each scan. CT produces digitalized images, although these are usually printed onto hard copy film in a format that is useful for transfer and viewing throughout the hospital. By electronic means CT improves via a higher contrast sensitivity, the natural radiological contrast between organs. However, it cannot create contrast where none exists naturally. CT is exceptionally sensitive to contrast media and can detect abnormalities, caused by disease, following an injection of an intravenous dose of contrast medium. This procedure is known as enhancing the scan. About 43% of all CT procedures involve the use of a contrast medium. CT is widely used throughout the body but the most frequently investigated areas using this technique are neuroradiology (brain and lumbar spine) and general radiology of the chest, abdomen and pelvis. It is particularly useful for the diagnosis, staging and follow up of malignant disease. 4. Myelography The spinal cord and the attendant nerve-roots which radiate from it cannot be visualised using conventional X-rays alone without the use of contrast media. They can be visualised directly using magnetic resonance imaging (MRI). They can be visualised if contrast medium is injected in the cerebrospinal fluid (CSF), which surrounds the spinal cord, rendering the CSF radio-opaque but not the cord of nerve roots. Specific contrast media have been developed for this examination. The majority of myelograms (or radiculograms) were performed to examine the lumbar region to confirm the clinical suspicion of a prolapsed intervertebral disc. However, CT and MRI have now largely replaced myelography as the initial investigation of the lumbar spine. Myelography, particularly combined with CT scanning is still used however to investigate the cord and cervical region and its nerve roots in difficult cases when other investigations are equivocal or normal. Interventional Techniques/Procedure Many radiologists are now specialised in therapeutic procedures that have bee developed from radiological diagnostic techniques using catheters and guidewires. These procedures include: The dilation of pathologically narrowed arteries angioplasty, percutaneous transluminal angioplasty (PTA). The deliberate occlusion of arteries supplying abnormal areas such as tumours, aneurysms and vascular malformations, so depriving them of their blood supply. The placement of artificial tubes or stents into blood vessels, bile ducts or ureters to bypass a pathological narrowing. These procedures often necessitate the use of high doses of contrast medium, because several examinations of the same vessels may be required during the control of the therapeutic process. Safety of Contrast Media Contrast media are among the safest of all of the pharmaceutical products available to the doctor today. They are anomalous in that they are not intended to have therapeutic activity: indeed, the ideal contrast medium would have no pharmacological activity at all. For this reason the concept of therapeutic ration, which can be applied to medicines, does not apply to contrast media. The development of a contrast medium from the first design of the molecule through to product licence takes many years. The minimum period of time that can reasonably be allotted to preclinical and clinical development is six years, and in practice it is not uncommon to take nine years or even more. During this long period, the tolerance of the medium is rigorously tested by collecting data from various preclinical and clinical trials to establish a profile for the product. One critical area examined during its development is the incidence of adverse reactions. The rate of adverse reactions to iodinated co ntrast media on the market is extremely low, but such reactions do occur just as they do with every pharmaceutical product. The adverse reactions associated with contrast media can be divided into two groups: Those reactions that are clearly dependent on the dose and concentration of the contrast medium administered and those that are almost independent of dose and concentration. Dose-dependent adverse reactions are mostly due to the physiochemical effects of the contrast medium, such as its osmolality, or electrical charge. Possible adverse reactions include heat, pain, vasodilation, cardiac depression and hypotension. The adverse reactions which are almost independent of dose and concentration are nausea and vomiting as well as allergy-like or hypersensitive reactions such a urticaria (hives), certain cardiovascular reactions, bronchospasm and laryngospasm, but there is little evidence of any antigenantibody interaction. These reactions cannot be predicted and their underlying cause remains unknown. For clinical purposes it is meaningful to divide contrast media reactions into three categories: Minor e.g. Flushing, nausea, vomiting, pruritis, mild rash, arm pain Moderate e.g. More severe urticaria, facial oedema, hypotension, bronchospasm Severe e.g. Hypotensive shock, laryngeal oedema, convulsions, respiratory and cardiac arrest Most contrast media reactions are minor and need no treatment. Moderate reactions are encountered rarely (about 1%) and severe reactions very rarely (about 0.1%), but all moderate and severe reactions require adequate treatment. Deaths following contrast media administration are extremely rare. Reported mortality rates vary between 1 in 10,000 and 1 in 169,000 averaging around 1 in 75,000. Katayama et al. (Radiology 1990; 175: 621-628) found that there is a reduction in adverse reaction rate of about four times using low osmolar contrast media (LOCM) for intravenous injection compared to high osmolar contrast media (HOCM). There is surprisingly no documented difference in mortality between intravenous LOCM and HOCM in large series from Japan and Australia. It is not usually possible to predict severe reactions, even by looking at the effect of a small test dose of a contrast medium. Guidelines have been produced for the use of low osmolar contrast agents. Risk Renal adverse reactions Contrast media-induced nephropathy is defined as impairment in renal function (an increase in serum creatinine by >25% or 44à £Ã¢â€š ¬Ã¢â€š ¬mol/L (0.5mg/dL) occurring within 3 days following the intravascular administration of contrast media in the absence of an alternative etiology Risk factors include raised s-creatinine levels particularly secondary to diabetic nephropathy, dehydration, congestive heart failure, age over 70 years old, concurrent administration of nephrotoxic drugs, e.g., non-steroidal ant-inflammatory drugs Systematically effective 1. Adequate hydration in terms of oral fluid intake or intravenous normal saline (depending on the clinical situation) at least 100 ml per hour starting 4 hours before to 24 hours after contrast administration is recommended. Concurrent administration of nephrotoxic drugs should be stopped for at least 24 hours. High osmolar contrast media, large doses of contrast media, or multiple studies with contrast media within a short period of time should be avoided. Alternative imaging techniques that do not require the administration of iodinated contrast media should be considered. Recent work in preventing and ameliorating contrast medium-induced nephropathy with N-acetyl cysteine 4-6 and various hydration regimens including use of sodium bicarbonate has been promising but is not conclusive yet. No measure has yet resulted in avoidance of its occurrence in all patients.Non-renal adverse reactions.These are generally classified as idiosyncratic or chemotoxic. Idiosyncratic (i.e., anaphylac toid) reactions occur unpredictably and independently of the dose and concentration of the agent. Most anaphylactic reactions relate to the release of active mediators. Conversely, chemotoxic-type effects relate to the dose, the molecular toxicity of each agent, and the physiologic characteristics of the contrast agents (i.e., osmolality, viscosity, hydrophilicity, calcium binding properties, and sodium content). Chemotoxic-type effects are more likely in patients who are debilitated or medically unstable 2. Acute reactions to contrast media can be divided into minor, intermediate, and severe life-threatening. Minor reactions include flushing, nausea, arm pain, pruritus, vomiting, headache, and mild urticaria. Such reactions are usually mild in severity, of short duration, selflimiting and generally require no specific treatment. Intermediate reactions are more serious degrees of the same symptoms, moderate degrees of hypotension, and bronchospasm. The reactions usually respond readily to appropriate therapy. Severe life-threatening reactions include severe manifestations of all the symptoms described as minor and intermediate reactions, plus convulsions, unconsciousness, laryngeal oedema, severe bronchospasm, pulmonary oedema, severe cardiac dysrhythmias and arrest, cardiovascular and pulmonary collapse. The prevalence of adverse reactions with lowosmolar contrast media is less than with high-osmolar contrast media by a factor of 5-6. Lethal reactionsrarely occur. The actual risk of death is less than one in 130,000 at most 3. The incidence of severe adverse reactions increases in patients with previous contrast medium reaction, bronchial asthma and allergy requiring medical treatment. Premedication with corticosteroid prophylaxis has been proved safe and effective in preventing minor adverse events in high-risk patients when ionic agents are used 4. The data indicating a protective effect of corticosteroid prophylaxis are less established when non-ionic agents are used. Opinion is divided about the value of premedication when nonionic agents are used. Even if it is given, there is a wide variety of regimes with different doses, number of doses, and frequency for corticosteroid prophylaxis. 5. A variety of symptoms (e.g. nausea, vomiting, headache, itching, skin rash, musculoskeletal pains, fever) have been described, but many are unrelated to the contrast medium. Allergy-like skin reactions are welldocumented side effects of contrast media, with an incidence of approximately 2%. Most late skin reactions after contrast medium exposure are probably T-cellmediated allergic reactions. Patients at increased risks are those with history of previous contrast medium reaction and those undergoing interleukin-2 treatment. Most skin reactions are usually mild to moderate, selflimiting and likely resolve within a week. Treatment is symptomatic and similar to the treatment of other druginduced skin reactions.Extravasation of contrast material is a well-recognised complication. The introduction of automated power injection has increased the incidence because power injection may result in extravasation of large volumes in a short period of time and may lead to severe tissue damage. Intravenous Urography Introduction Intravenous urography is a radiographic study of the  urinary system  using an intravenous contrast agent (dye). It is a medical procedure used to visualise the kidney and lower urinary tract to help diagnose problems such as infections. A contrast dye is injected into a vein on your hand or arm, and then x-rays are taken. The dye helps to outline more clearly the structure of the kidneys and lower urinary tract. The  kidneys excrete the contrast into the urine, which becomes visible when x rayed (radiopaque), creating images of the urinary collection system. An intravenous urogram is ordered to demonstrate the structure and function of the kidneys, ureters, and bladder. Patients complaining of abdominal pain radiating to the back may require this exam to rule out  kidney stones. Hematuria may also be an indication of kidney stones,infection, or tumors. Patients with high blood pressure (hypertension) and recurrent bladder infections may also require an intravenous urogram (b ut hypertension usually is imaged with MRA or nuclear medicine imagery and this exam is done when renal artery stenosis is the suspected cause of refractory hypertension). Sometimes the exam is ordered to evaluate the function of the kidney in a renal transplant patient. The transplanted kidney is located in the iliac fossa, so special films of the pelvis area are done instead of the normal routine views. The radiographic technologist may also be required to take x rays in the operating room when a retrograde pyelogram is ordered by a urologist during a C and P (cystoscopy  and pyelography). Indication A normal intravenous urogram indicates no visible abnormality in the structure or function of the urinary system. The radiologist looks for a smooth non-lobulated outline of each kidney, no clubbing or other abnormality of the renal calyces (collecting system), and no abnormal fluid collection in the kidneys that could suggest obstruction. The ureters must contain no filling defects (stones) or deviations due to an adjacent tumor. The bladder must have a smooth outline and empty normally as visualized on the post-void film. Abnormal results include hydronephrosis (distension of the renal pelvis and calices due to obstruction) as a result of tumors or calculi (stones). Cysts or abscesses may also be present in the urinary system. A delay in renal function can also indicate renal disease. An abnormal amount of urine in the bladder after voiding may indicate prostate or bladder problems. Intravenous urograms are often done on children to rule out a rapid developing tumor in the kidneys, called a Wilms tumor. Children are also prone to infections of the bladder and kidneys due to urinary reflux (return back-flow of urine). Procedure The patient will be required to change into a hospital gown and empty his or her bladder. The x-ray technologist will verify that the patient has followed the bowel preparation and complete a detailed questionnaire on the current medical history of the patient. This includes previous contrast reactions, known  allergies, risks of  pregnancy, and current medications. The x-ray technologist will explain the exam in detail to the patient as well as the risks of the contrast material that will be injected intravenously. All departments require that the patient sign a consent form before the examination is started. The x-ray technologist will relay this information to the radiologist who will decide on what type of contrast will be used. Patients who have had an injection with no reaction can be given less expensive iodine based contrast, whereas patients who take various  heart  medications or those with known allergies or  asthma will be injected with a more expensive contrast agent (known as non-ionic contrast) that has fewer side effects. Some departments use the non-ionic contrast exclusively. The patient will be instructed to lie supine (face-up) on the x-ray table and a preliminary KUB will be done. This is an abdominal view of the kidneys, ureter, and bladder used to verify patient preparation, centering, and the radiographic technique needed to demonstrate all the required structures. Kidney stones may or may not be visualized on the preliminary film. The x-ray technologist prepares the required amount of contrast to be used depending on the weight of the patient (1 ml per pound). This is normally 50-75 cc of contrast for an average-sized patient. The contrast will be injected all at once (bolus injection) or in some cases, through an intravenous drip. Some radiologists prefer to start an intravenous drip with saline as a precautionary measure while others inject with a small butterfly needle. The needle usually remains in place for 10-15 minutes, in case more contrast is needed or in case drugs need to be administered because of an allergic reaction. Most reactions occur immediately but some can take place 10 or 15 minutes after the injection. The first film is taken immediately after the injection to see a detail of the renal outline (nephrogram). Films are usually taken at five-minute intervals depending on the routine of the radiologist. Compression may be applied to the lower abdomen with a wide band to keep the contrast material in the kidneys longer. This creates a more detailed image of the renal collecting system. When the compression is released after approximately 10 minutes the contrast material drains quickly and a detailed, filled image of the ureters is obtained. Films done in the upright or prone (face-down) position may also be ordered to better visualize the lower ureters. Some departments require routine renal tomographic images to be done as well when the kidneys are well visualized. This allows the kidneys to be seen free of gas or fecal shadows. Sometimes the radiologist requires oblique views of the kidneys or bladder to determine the exact location of calculi (stones). At approximately 20 minutes aft er the injection a film centered on the bladder may be required. The x-ray tube is angled slightly caudad (towards the feet) so that there is no superimposition of the pubic area of the pelvis over the bladder. The films are shown to the radiologist and if no further films are necessary the patient will be asked to void (urinate) and a post-void film will be taken. The exam can take from 30 minutes to one hour depending on the number of films required. If the kidney is obstructed, delayed films may be required to complete the exam. Patient care The x-ray technologist must work in conjunction with the doctors and nurses in making sure the patient has not had a previous allergic reaction to a contrast agent. All hospitals have an emergency team ready to react in such a situation, so the technologist must be aware of the procedure to follow when assistance is necessary due to a severe reaction. Details of patient preparation must also be communicated to the hospital wards. In some hospitals the radiologic technologists are trained to give injections, but if this is not the case nurses may be asked to install an intravenous drip before the patient is brought to the radiology department. The x-ray technologist must explain the risks of an allergic reaction to each patient even though severe reactions are extremely rare due to the advances made in the preparation of contrast agents. The x-ray technologist explains to the patient that a warm, flushed feeling or a metallic  taste  in the mouth are normal reactions in some patients. Breathing instructions are also important since the kidneys change position depending on the phase of respiration and to prevent motion artifacts. Sometimes an emergency patient with renal colic (acute abdominal pain) is asked to urinate through a special filter used to trap small stones. All radiographic technologists must be certified and registered with the American Society of Radiologic Technologists or an equivalent organization. Continued education credits are mandatory to remain registered. Risk and side effect Some of the side effects and possible complications including minor reactions to the contrast dye. It may include flushing, warmth and a metallic taste in the mouth. These usually resolve quickly. These symptoms are much less common with the newer contrast dyes. Some patient might experience severe allergic reactions. It may occur in a small percentage of the population. Symptoms range from relatively mild to severe, and can include hives (skin rash), breathing difficulties, swelling of the lips and tongue, low blood pressure and loss of consciousness. There is case when a patient experienced acute renal failure  but it occurs in less than 0.5 per cent of cases. Risk factors include advanced age, diabetes, dehydration and a past history of kidney disease. For patients with these risk factors, extra intravenous fluids, pre-treatment with acetylcysteine, and a reduced dose of contrast dye may be recommended, or they may undergo different procedures altogether. Problems that found There are several limitations of ultrasonography, CT, and MRI: lack of visualization for large portions of the urinary tract with ultrasonography, necessity of contrast agent administration and excretory images with CT, inability to visualize subtle urothelial abnormalities with sufficient spatial resolution with both CT and MRI, and insufficiency in visualizing calcifications with MRI[1]. Additional disadvantages of MRI are inconspicuousness of small intrarenal calculi, susceptibility artifact due to metallic objects that interfere with the visualization of ureteral segments, flow-related artifact in some sequences, and interference of hemorrhage into renal collecting system with static-fluid MR urography[8]. The patient effective dose, and therefore radiation risk, of CT urography is 1.5 times that of conventional urography. The increased radiation risk from a CT urography compared with an IVU should be considered in the context of the amount of information that is necessary for th e diagnostic task. Radiation risk is increased for smaller patients in CT urography and for larger patients in IVU[5]. Although CT falls short of IVU in the evaluation of urothelium, helical CT technology continues to evolve with introduction of multidetector row scanning (MDCT)[3,9]; MDCT may eventually replace IVU for the evaluation of hematuria[2,4]. Finally, there is not an optimum or ideal examination technique for CT urography[10] or MR urography. Examination techniques must be constructed according to suspected pathology of the patient and urinary system status. Although advances in imaging technology have given CT and MR urography advantages over IVU, many centers still use IVU as a part of routine radiological practice. Therefore, techniques or modifications for improving application and diagnostic capabilities of IVU should still be considered. For decades, intravenous urography has been the primary imaging modality for evaluation of the urinary tract. In recent years, however, other imaging modalities including ultrasonography (US), computed tomography (CT), and magnetic resonance (MR) imaging have been used with increasing frequency to compensate for the limitations of intravenous urography in the evaluation of urinary tract disease . Like intravenous urography, however, these examinations have their limitations. Large portions of the urinary tract are not visualized at US; CT requires contrast material administration and excretory images (at times with a prolonged delay), often with image reformatting for evaluation of the urothelium; and MR imaging may not demonstrate calcifications or show the urothelium with sufficient resolution for evaluation of subtle abnormalities. Thus, despite increasing use of these alternative modalities, the ideal global urinary tract examination remains controversial . Axial imaging with con trast material opacification of the urinary tract will likely evolve as the most efficient imaging evaluation. However, the declining use of intravenous urography in clinical practice reduces the opportunity to learn important interpretive skills. Formal urography (or the urographic equivalent of conventional radiography of the urinary tract following administration of contrast material for CT) is frequently performed in the evaluation of hematuria. Urography may also be performed in the pre- or posttherapeutic evaluation of stone disease that has been discovered with other modalities. BARIUM SWALLOW Introduction A barium swallow and meal is type of X-ray test that allows your doctor to examine your throat, oesophagus (the pipe that goes from your mouth to your stomach), stomach and the first part of the bowel (duodenum). X-rays usually pass straight through parts of the gut such as the oesophagus, stomach and bowel and so these structures dont show up well on plain X-ray images. However, if the gut wall is coated with barium, a white liquid that X-rays cant pass through, a much clearer image of the outline of the gut can be captured. If your stomach is being examined, the test is called a barium meal. If your oesophagus is examined at the same time, its called having a barium swallow and meal. A barium swallow and meal test can help work out why youre getting symptoms such as difficult or painful swallowing, heartburn, reflux and abdominal pain. The tests give your doctor information about the swallowing action, and

Stanley Kowalski in A Streetcar Named Desire by Tennessee Williams Es

Stanley Kowalski in "A Streetcar Named Desire" by Tennessee Williams In the play, A Streetcar Named Desire, author Tennessee Williams does a wonderful job developing the character of Stanley Kowalski. To me, his character seemed most like that of a true person. On the other hand, Stella, Stanley's wife, is mainly displayed as being the loving type, and because that is basically the only character trait she displays, it is difficult to really understand her as a person. The character of Stanley Kowalski is developed much like a real person, having numerous personality traits. One characteristic of Stanley is his rudeness and cruelty towards Blanche, Stella's sister. It is very apparent that Stanley does not care for Blanche. Scene eight mentions Blanche's birthday party, and surprisingly, she receives a gift from Stanley. This gift, however, is not one that most people would appreciate. Blanche is very surprised to get a gift from Stanley, and as she opens it she says, "Why,why-Why, it's a-" . This is the first indication that there is something the matter. Because Blanche can't finish her sentence, Stanley lets everyone know that it's a "Ticket! Back to Laurel! On the Greyhound! Tuesday!" . Blanche obviously couldn't finish her sentence because she was insulted that her birthday present implied that she was not welcome by Stanley. Even Stella knew how rude and cruel Stanley had acted towards Blanche. Stella lets Stanley know, "You needn't have been so cruel..." . In scene ten, Stanley says to Blanche, "Take a look at yourself in that worn-out Mardi Gras outfit, rented for fifty cents from some rag-picker! And with the crazy crown on! What queen do you think you are?". This quote shows that Blanche's p... ...takes the only remaining course to maintain his territory; by raping Blanche he establishes the physical domination he attempted, unsuccessfully, early in the play, and the psychological domination he attempted, later, by using Blanche's own guilt against her. From our first introduction to Stanley, when he tosses the bloody package to Stella, to our last, when he rips the lantern off the light just before the doctor and nurse take Blanche away, we see this man as an expression of animalistic territoriality. He uses every tactic possible to exert his power over a fragile, but threatening woman. Finally, using brute force and sexual dominance, he appears to win. In fact however, the winner is ambiguous if even in existence. A rift has developed in the only relationship that Stanley values - that between him and his wife, with no promise of a better future.

Saudi Student Organization; Objectives

Just like any other organizations for international students in the university, we aimed to provide family oriented environment for our members. We are genuinely inviting other Saudi students therefore to get involved with â€Å"The Saudi Student Organization at USI†, as we firmly believe that our common culture and social orientation will help us to work more effectively as family and organization. This organization will represent Saudi culture, civilization and history and link them to other USI students of whatever nationality. Furthermore, this organization will help strengthen the social bonds of Saudi students as we are going to redefine the common misconceptions about us. Basically one of its objectives is to increase the members’ understanding towards Saudi and Middle Eastern cultures and to provide them with better understanding with American culture as well. In this way, Arabic students will be able to cope and adjust to the American culture easier and faster. Since, we are anticipating an increasing number of students from Saudi Arabia; we are also aiming to increase the number of our members in SSO. Assuredly, this organization will respond effectively to the members’ special needs and to ensure smooth and positive integration and relationship between other students in the campus. The Saudi Student Organization will provide many opportunities to students from Saudi Arabia and the like to share the beauty and authenticity of their culture and tradition and thus engaging in meaningful and educational dialogues with American students and others. Apparently, the main objective of this is to increase mutual understanding among individuals inside the campus. Furthermore, to be involved in this organization will give the Arabic students opportunities to continue fulfilling and practicing their tradition and religion within their co Arabic members who share the same beliefs. Therefore, there will never be a sense of isolation in this organization since every member can always find something or someone to relate to. They can always accumulate updates towards their culture within the organization and can share ideas and thoughts on how to reaffirm their identity in a foreign country like United States. Meanwhile, SSO will also represent and address the concerns of its members in the administration. Thus, SSO guarantees its members that they always have a voice through their support group. New members, that are those who just came from their country of origin, will be guaranteed that they will acquire enough orientation through SSO about the university as a whole; its culture, trends, academic pattern and sense of community. Furthermore, members will be exposed too to various activities of the university inside and outside. In this way, they can widen their experiences towards different culture and people and as a result they will have more chance to widen their social network, learning and wisdom. Apparently SSO will guarantee its members that learning will not stop within the confinement of the four corners of the classroom but rather SSO will assure them that we will provide them free learning activities and experiences. These objectives will make the members more tolerant and flexible in a society where there is an apparent diversity of culture and different set of belief system. Aside from the aforementioned objectives, SSO will also help its members to develop their leadership skills and self esteem and to explore their full potentials. This will be beneficial for the application of their profession in the future. Interestingly, joining SSO will be a good and wise investment for future endeavors. Members will also be exposed to different kinds of experiences that will even give them many opportunities to help people through sharing and camaraderie. In the future, they will become tolerant and flexible individuals who are prepared to face different kinds of circumstances. Throughout these objectives, SSO conclusively encourage its members to be globally competitive to ensure success not just materially but socially, spiritually and intellectually. We are thus encouraging our co Saudi students to join Saudi Student Organization (SSO) as we want you to experience the fulfillment of our goals and objectives.

Political context of The Great Gatsby

America during 1920s enjoyed a consummate historical period – so called the ‘Economic Boom'. Consequently, more and more people became wealthy. This resulted in dramatic changes in American social structure as there was a huge increase in the middle classes. People's obsession over their wealth had no limits. There was a big emphasis on individualism as the Republicans enjoyed widespread support due to their achievements. Perhaps this explains the attitude of the characters in the ‘Great Gatsby'. Gatsby's desire for wealth and individualism was certainly boosted by his feelings towards Daisy. Daisy Buchannan – who had a high rank in American society even before she got married, could not belong to Gatsby's world and their relationship in the light of this period of American history was seen as irrational. The gaps in American social structure were undoubtedly large, however Republican's idea of individualism allowed an access to higher rank in society. Characters' traits such as determination, adroitness and hard-work were heavily respected in US during that time. This explains Gatsby's struggle in achieving respected status and wealth. Perhaps, from a political point of view, Gatsby therefore could be seen as a model of a successful American during the ‘Economic Boom'. America – a great social and economic experiment, noble in motive and far-reaching in purpose. Herbert Hoover (1874 – 1964) – Republican president of USA Furthermore, the Americans' position during the 1920s made them think that they are infallible. Certainly, this resulted in racism and over – patriotic attitude. For example, Tom says that ‘Civilisation's going to pieces' referring to ‘The Rise of Colored Empires' and defines Americans as the ‘dominant race' (chapter I). This boundless confidence spread into different countries and the term of an ‘American Dream' (that is – a dream of a total achievement of wealth) became more and more popular. Ironically, America's ‘Economic Boom' was a direct consequence of the First World War when they isolated themselves and achieved a great deal of widespread wealth at the cost of the other suffering countries. In fact, the ‘Economic Boom' was mostly a result of a well-developed trade of military supplies with countries involved in war. Similarly, ‘The Valley of Ashes' (â€Å"a fantastic farm where ashes grow like wheat† – Chapter II) can be seen as the symbol of American's abusing of the lower social classes as the wealthy businessmen dump their ashes on the land belonging to lower ranks. Perhaps in this sense, Fitzgerald hints at his contempt of a Republican idea and despises the order in USA during that time. Therefore the ill-thought through American idea of desire for money descended from the ‘Economic Boom' in 1920s. Having said this, we are not surprised when Gatsby describes Daisy's voice as ‘full of money'. Wealth and competitiveness was considered as the norm because in early 20th century America such values had been seen as essential to become a politically correct ‘American'. To become politically correct one tended, or maybe preferred, to become blind to human suffering. It is best described by Nick that â€Å"Tom and Daisy – smashed up creatures and then retreated back into their money or their vast carelessness†. Indeed, in this way, Tom and Daisy have managed to brutally achieve their ‘American Dream'.