Y. Kusumo Adi Arji Atmanto
Department of Clinical Pathology, Faculty of Medicine, Hasanuddin University

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Determination of Platelet Count Estimation Factor on Peripheral Blood Smear Confirmation Using Field Number 22 Microscope Y. Kusumo Adi Arji Atmanto; Agus Alim Abdullah; Darwati Muhadi; Mansyur Arif
INDONESIAN JOURNAL OF CLINICAL PATHOLOGY AND MEDICAL LABORATORY Vol 29, No 1 (2022)
Publisher : Indonesian Association of Clinical Pathologist and Medical laboratory

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24293/ijcpml.v29i1.1949

Abstract

The automatic platelet count sometimes requires confirmation on the peripheral blood smear. Platelet count estimation can also be used for reporting platelet count if an automatic cell counter is not available, with an estimation factor according to the Field Number (FN) of the microscope used. This study aimed to determine the platelet count estimation factor based on peripheral blood smear confirmation using an FN 22 microscope. An observational cross-sectional study was carried out in patients who had routine hematological and peripheral blood smear examinations during September 2021 by determination of platelet count using the automatic cell counter method and an average number of platelet counts per field of view with 100x objective magnification. The estimation factor is the total ratio divided by sample size. The total ratio of 254 samples was 4.086. The platelet count estimation factor was 16, indicating that 1 platelet per field of view was equivalent to 16x103/µL. There was a very strong significant correlation between mean platelet count per field of view and platelet count using the automatic cell counter (p<0.001, R>0.750). The field number is the image diameter of the microscope eyepiece. The latest generations of microscope use FN 20 or more, which provides a wider field of view, enabling the observation of more platelets. Factor estimation was used to determine the estimated platelet count on a peripheral blood smear. A big difference between automatic cell counter and peripheral blood smear might indicate pre-analytic, analytic, and post-analytic errors. The platelet count estimation factor based on peripheral blood smear confirmation using the FN 22 microscope was 16. Each laboratory needs to determine the estimation factor according to the FN microscope used.
Laboratory Aspect of Broken Heart Syndrome Y. Kusumo Adi Arji Atmanto; Sulina Yanti Wibawa; Darmawaty E Rauf
INDONESIAN JOURNAL OF CLINICAL PATHOLOGY AND MEDICAL LABORATORY Vol. 29 No. 2 (2023)
Publisher : Indonesian Association of Clinical Pathologist and Medical laboratory

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24293/ijcpml.v29i2.1990

Abstract

Broken Heart Syndrome (BHS) is the weakness of the heart muscle due to emotional stress or physical stress called cardiomyopathy.  The main etiology is a sudden release of stress hormones (catecholamines), such as norepinephrine, epinephrine, and dopamine. About 90% of BHS patients are female with average age of 67-70"‰ years, most of them are post-menopausal females. The most widely supported pathological theories are catecholamine-induced cardiotoxicity and microvascular dysfunction. The clinical condition resembles that of acute myocardial infarction, consisting of chest pain, electrocardiographic changes, elevated cardiac biomarkers, and abnormalities of heart wall motion. There is transient systolic dysfunction in the apical and/or middle segment of the left ventricle resembling acute myocardial infarction but absence of coronary artery obstructive disease. There are BHS criteria according to Mayo Clinic. Laboratory tests can be performed by examining Natriuretic Peptides, cardio myonecrosis markers (Troponin I and T, creatinine kinase, and myoglobin), and catecholamines. There is no single established biomarker for initial diagnosis of BHS that distinguishes it from STEMI. It was found that the most accurate ratio as a marker capable of differentiating BHS from STEMI in early stages was NTproBNP/TnI ratio. The InterTAK diagnostic score was used to predict the probability of BHS, differentiating it from ACS in an acute stage, prior to coronary angiography. The main differential diagnosis of BHS is ACS, besides acute myocarditis infectious. Patients with BHS should be treated as ACS until proven otherwise. The prognosis for BHS patients is generally very good.
Determination of Platelet Count Estimation Factor on Peripheral Blood Smear Confirmation Using Field Number 22 Microscope Y. Kusumo Adi Arji Atmanto; Agus Alim Abdullah; Darwati Muhadi; Mansyur Arif
INDONESIAN JOURNAL OF CLINICAL PATHOLOGY AND MEDICAL LABORATORY Vol. 29 No. 1 (2022)
Publisher : Indonesian Association of Clinical Pathologist and Medical laboratory

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24293/ijcpml.v29i1.1949

Abstract

The automatic platelet count sometimes requires confirmation on the peripheral blood smear. Platelet count estimation can also be used for reporting platelet count if an automatic cell counter is not available, with an estimation factor according to the Field Number (FN) of the microscope used. This study aimed to determine the platelet count estimation factor based on peripheral blood smear confirmation using an FN 22 microscope. An observational cross-sectional study was carried out in patients who had routine hematological and peripheral blood smear examinations during September 2021 by determination of platelet count using the automatic cell counter method and an average number of platelet counts per field of view with 100x objective magnification. The estimation factor is the total ratio divided by sample size. The total ratio of 254 samples was 4.086. The platelet count estimation factor was 16, indicating that 1 platelet per field of view was equivalent to 16x103/µL. There was a very strong significant correlation between mean platelet count per field of view and platelet count using the automatic cell counter (p<0.001, R>0.750). The field number is the image diameter of the microscope eyepiece. The latest generations of microscope use FN 20 or more, which provides a wider field of view, enabling the observation of more platelets. Factor estimation was used to determine the estimated platelet count on a peripheral blood smear. A big difference between automatic cell counter and peripheral blood smear might indicate pre-analytic, analytic, and post-analytic errors. The platelet count estimation factor based on peripheral blood smear confirmation using the FN 22 microscope was 16. Each laboratory needs to determine the estimation factor according to the FN microscope used.