purpose of thin blood smear

There are numerous valid reasons for a clinician to request a blood smear (Table 1), and these differ somewhat from the reasons why laboratory workers initiate a blood-smear examination. Kenya Medical Research Institute (KEMRI) [22] [23]. Description of the proposed method and database is described in Section II. 3. Results of thick and thin blood smears may show: Normal. Remove thin smear slides and rinse by dipping 3-4 times in the Giemsa buffer. Staining procedure for thin blood film 1. fever spike . Ignou student. 4. Fix air-dried film in absolute methanol by dipping the film briefly (two dips) in a Coplin jar containing absolute methanol. Why It Is Done. The method uses Artificial Neural Net- work (ANN) to test for the presence of plasmodium parasites in thin blood smear images. A thin blood smear is a drop of blood that is spread across a large area of the slide. Purpose and Criteria for Blood Smear Scan, Blood Smear Examination, and Blood Smear Review.pdf Available via license: CC BY-NC 3.0 Content may be subject to copyright. Dry the slides upright in a rack. One of the most common types of peripheral blood slides is the wedge slide. You can make perfect blood smear by using 10 micro L of blood on a slide Aim of blood smear • Blood films are usually examined to investigate hematological problems (disorders of the blood) and, occasionally, to look for parasites within the blood such as malaria and filaria. Results . The Procedure of Giemsa staining varies as per the purpose of staining that means whether the staining is done for the examination of Blood cells or to find the Parasites in the blood smear and accordingly the Blood smears are prepared as Thin Blood films or Thick blood films. BLOOD SMEAR BASICS JENNIFER A. NEEL, DVM, DACVP (CLINICAL) ASSOCIATE PROFESSOR, CLINICAL PATHOLOGY NC STATE COLLEGE OF VETERINARY MEDICINE RALEIGH, NC, 27607 Introduction Although tremendous advances have been made in the field of point-of-care hematology analyzers, examination of a well prepared, well stained blood smear remains the cornerstone of veterinary Quick stains. A blood smear, also referred to as a peripheral smear for morphology, is an important test for evaluating blood-related problems, such as those in red blood cells, white blood cells, or platelets.It has a wide range of uses, including distinguishing viral infections from bacterial infections, evaluating anemia, looking for causes of jaundice, and even diagnosing malaria. To date, microscopic examination of thick and thin blood smears is the easiest and most reliable test for malaria. A blood smear reveals information about the number and shape of blood cells in the body. smooth even appearance, long straight narrow borders, erythrocytes are distributed in a single layer, red cell area, feathered edge. Air dry the thin film, fix it with methyl alcohol, and immediately stain it. Smear are made for preparing slides for staining which are used in microscopy. Cover each slide completely with 1-2ml of Leishman’s stain (undiluted) using Pasteur pipette and leave for around 45seconds. The perfect quality smear is influ- enced by three factors: speed, angle and drop size. https://amzn.to/2Vn4f9N (affiliate link)How to Make & Stain, Thick & Thin Blood Smear. For the best results, the smear should be stained with a 3% Giemsa solution (pH of 7.2) for 30 - 45 minutes. Thin blood can lead to excessive bleeding and bruising and has various causes. 5. The slides must not be in contact with each other or else the stain will be flow off. detection using stained thin blood smear images was developed. 2. For Thin blood smear . The thin smear keeps the red blood cells intact and as Moses Ngeiywa points out, the infected red blood cells are often affected differently by the different malaria species. 30×) than in an equal area of a thin smear. The purpose of preparation of blood smear (blood film} is to study the morphology of RBCs, differential leukocyte count and reticulocyte count. A frog blood smear is a thin layer of frog's blood that has been carefully spread on a glass microscope slide. This test can be used to diagnose, monitor numerous conditions and blood diseases that affect the population of blood cells. 3. The slower the slide is moved, the shorter and thicker the slide will be. Add the buffer. Thin blood is the opposite of thick blood, which can increase the risk of blood clots and complications, such as stroke. dip the smear (2-3 dips) into pure methanol for fixation of the smear, leave to air dry for 30seconds; Flood the slide with 5% Giemsa stain solution for 20-30 minutes. A blood smear scan serves to at least (a) verify the flagged automated hematology results and (b) determine if a man-ual differential leukocyte count needs to be performed. Allow the methanol-fixed thin smear to dry completely in air (approximately 2 min) by placing the slides on a flat surface. It should end about two-thirds to three-fourths of the way down the slide. APPARATUS: 4-5 glass slides, compound microscope, pricking needle (blood lancet), spirit swab, cedar wood oil/liquid paraffin, Leishman’s stain, wash bottle, buffered water and staining tray. For rapid diagnosis, make thick and thin smears on separate slides. An ideal slide is neither too thin nor too thick. The blood smear must not be too thin or too thick and the tail of the smear must be smooth. Remove and let air dry. Sometimes it is possible for a definitive diagnosis to be made from a blood smear. Never let the slide dry in a vertical position with the thin film down, as this may result in fixation of the thick film by methanol vapour. Doctors use thick and thin blood smears to determine whether you have malaria. Blood films are examined in the investigation of hematological (blood) disorders and are routinely employed to look for blood parasites, such as those of malaria and filariasis ADVERTISEMENTS: The smear is greater than 25 mm long and the feathered edge stops approximately 10 mm from the end of the slide. purpose of a blood smear. Note: As alternates to this 45-60 minutes in 2.5% Giemsa stain, the smears could be stained for shorter times in more concentrated stains. Very Easily. white cells, which help your body fight infections and other inflammatory diseases. The faster the spreader slide is moved, the longer and thinner the smear will be. Thick smears should be left in buffer for 5 minutes. The method for staining, concentration and timing of stain used varies according to the purpose, for example, thin blood smears use 1:20 dilution of stock whereas for thick blood smear 1:50 dilution is used. Diff-quick, Cams quick. This paper is arranged as follows. Thin blood smears helps doctors discover what species of malaria is causing the infection. See Figure 2-46. All you wanted to know about the blood smear test or the peripheral smear test, learn the Purpose, procedure and what the results mean. On a clean dry microscopic glass slide, make a thin film of the specimen (blood) and leave to air dry. The end of the smear should be thin enough that it has a rainbow-like reflectiveness about it, and there should be no streaks at the very edge. Peripheral blood smear test is ordered as part of a general health exam to help diagnose many illnesses. Exam Overview. A properly prepared blood smear will be 2/3 to 3/4 the length of the glass slide, have a gradual transition from thick to thin, have a feathered edge, and have an area where red cells do not overlap when viewed microscopically Flush with tap water and leave to dry It distinguishes between the various kinds of white blood cells . thin or thick blood smear. If one test is negative and no parasites are found, you will have repeated blood smea Three thick and thin smears 12-24 hours apart should be obtained. Principle: The thick blood film permits the examination of a large amount of blood for the presence of parasites. A blood smear is a blood test used to look for abnormalities in blood cells. However, they do not permit an optimal review of parasite morphology. Images of thin blood smear were obtained from two sources, namely Center f or Disease Control (CDC) [22] and . The blood elements (including parasites, if any) are more concentrated (app. This method produces a gradual decrease in thickness of the blood from thick to thin ends with the smear terminating in a feathered edge approximately 2 mm long. the purpose and criteria for blood smear examination in a variety of circumstances that are encountered in everyday laboratory hematology practice. The smear allows the various components of the blood to be viewed through the microscope. Thus, thick smears allow a more efficient detection of parasites (increased sensitivity). When the blood smear is totally dry, arrange the slides on the slide rack, with the blood smear facing front. It helps diagnose if red blood cells, white blood cells and platelets are normal in appearance and number. perform the manual differential white blood count, estimate platelet numbers, evaluate the morphology of red blood cells, white blood cells and platelets . The highest yield of peripheral parasites occurs during or soon after a _____; however, smears should not be delayed while awaiting _____. Experimental result is given in Section III while section IV explains the discussion. A blood film—or peripheral blood smear—is a thin layer of blood smeared on a glass microscope slide and then stained in such a way as to allow the various blood cells to be examined microscopically. Place the blood film on a tray or drying rack. The three main blood cells that the test focuses on are: red cells, which carry oxygen throughout your body. the examination of a blood smear when such protocols indicate that it is necessary. blood smear evaluation. 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