Clinical assessment, pertinent history, and family history are good indicators for determining patient's bleeding tendencies.
The most appropriate laboratory tests performed are Routine screening tests include a complete blood cell count, platelet count, and evaluation of a peripheral blood sample, a prothrombin time, and an activated partial thromboplastin time.
THROMBOCYTOPENIA is decreased platelet count we call it thrombocytopenias. causes of this are called an infection, cancer condition, some type of the drugs like heparin, etc. signs and symptoms of the is bleeding tendency patiche, purpuraetc/ the management of this is plasma transfusion admin situation of some of the drug immunotherapy is helpful for this condition. surgery splenectomy.
Blood coagulation disorders and laboratory diagnosis
Blood coagulation disorders and laboratory diagnosis
Coagulation disorders are disruptions in the body's ability to control blood clotting. Coagulation disorders can result in either a hemorrhage (too little clotting that causes an increased risk of bleeding) or thrombosis (too much clotting that causes blood clots to obstruct blood flow).
THROMBOCYTOPENIA is decreased platelet count we call it thrombocytopenias. causes of this are called an infection, cancer condition, some type of the drugs like heparin, etc. signs and symptoms of the is bleeding tendency patiche, purpuraetc/ the management of this is plasma transfusion admin situation of some of the drug immunotherapy is helpful for this condition. surgery splenectomy.
Blood coagulation disorders and laboratory diagnosis
Blood coagulation disorders and laboratory diagnosis
Coagulation disorders are disruptions in the body's ability to control blood clotting. Coagulation disorders can result in either a hemorrhage (too little clotting that causes an increased risk of bleeding) or thrombosis (too much clotting that causes blood clots to obstruct blood flow).
Anemia can be seen in the emergency department both as a primary pathological process or secondary to both medical and surgical diseases. Moreover, acute anemia can occur in children who have been otherwise healthy, who have systemic disease, or who have known hematologic disorders. Anemia may indicate a disorder with a single hematopoietic cell line (eg, red blood cells) or may be associated with changes in multiple cell lines indicative of bone marrow involvement, immunologic disease, peripheral destruction of erythrocytes, or sequestration of cells. Independent of the etiology, prompt diagnosis is predicated on understanding the classifications of anemia, the associated presenting symptoms, and the proper ordering and interpretation of laboratory studies. This article will discuss the evaluation, proper classification, differential diagnosis, and initial management of acute anemia using cases representative of those that might be seen in the pediatric emergency department.
define hematocrit and how's the test is performed
if hematocrit is abnormal what are the symptoms
risks of getting rbc count
if rbc is abnormal what are the consequences
prepare for blood collection for hematocrit
Hemostasis, Coagulation, Intrinsic, Extrinsic & common Pathways of Clotting, Common bleeding disorders & their investigations, BT, CT, PT, APTT, TT, Blood & its products, Blood transfusion & its complication.
Pleomorphic adenoma of the buccal salivary glandPrashant Munde
Salivary gland swellings can result from tumors, an inflammatory process
or cysts. It can sometimes be difficult to establish; whether pathology arises
from the salivary gland itself or adjacent structures. Neoplasms of the salivary
glands account for less than 1% of all tumors, 3–5% of all head and neck
tumors and benign pleomorphic adenoma (PA) of minor salivary glands arising
de novo is very rare. PA is the most common tumor of the salivary gland. While
the majority arises from the parotid gland, only a small percentage arises from
the buccal minor salivary gland. A case of PA of minor salivary glands in the
buccal mucosa in a 70‑year‑old female is discussed. It includes review of
literature, clinical features, histopathology, radiological findings and treatment
of the tumor; with emphasis on diagnosis.
Pericytes are the perivascular or mural cells of micro vessels. They are of mesenchymal origin and capable of differentiating into a number of different cell lineages. They are intimately associated with endothelial cells and communicate with them via direct physical contact or through paracrine signaling pathways. These interactions are important for blood vessel maturation, remodelling, and maintenance. Pericytes are versatile and their varying morphological characteristics and distribution make them difficult to study. The lack of universal pericytes markers is a major problem. A number of different functions have been attributed to pericytes, and in some organs they have more specific roles. The role of pericytes in tumor vessels is debated, but pericytes may contribute to stability, and might protect the vessels from antiangiogenic therapy. Understanding the process of angiogenesis in angiogenesis dependent diseases role of pericytes may be of therapeutic benefit.This article gives an overview of pericytes their role in health and disease particularly in relation to oral cavity.
The objective of this review is to introduce Merkel cells (MCs), to provide a basic
overview on the theoretical background of function, development and clinical
importance of MCs. The origin of human MCs have been controversial. Some
investigators believe that it is a neural crest derivate, whereas others have
proposed that it is a differentiation product of the fetal epidermal keratinocytes.
MCs are cells primarily localized in the epidermal basal layer of vertebrates
and concentrated in touch‑sensitive areas in glabrous, hairy skin and in some
mucosa. In routine light microscopy, human MCs can hardly be identified.
Cytokeratin 20 (CK20) is a reliable marker with highest degree of specificity.
MCs can be also distinguished by electron microscopy. MC carcinoma (MCC)
is an uncommon and often aggressive malignancy and found mainly in elderly
patients. It occurs most frequently in the head and neck region. Diagnosis is
based on typical histological presentation on hematoxylin and eosin (H and E)
stained slides together with the results of immunohistochemistry. Histologically,
MCC has been classified into three distinct subtypes: Trabecular, intermediate
and small cell type.
With the discovery in 1956 that the correct chromosome number in humans is 46, the new era of clinical
cytogenetics began its rapid growth. During the next few years, several major chromosomal
syndromes with altered numbers of chromosomes were reported, i.e. Downsyndrome (trisomy21),
turner syndrome (45,x) and klinefelter syndrome (47,xxy). Since then it has been well established that
chromosome abnormalities contribute significantly to genetic disease resulting in reproductive loss,
infertility, stillbirths, congenital anomalies, abnormal sexual developmentmental retardation and
pathogenesis of malignancy.specific chromosome abnormalities have been associated with over 60
identifiable syndromes. They are present in at least 50% of spontaneous abortions, 6% of stillbirths,
about 5% of couples with two or more miscarriages and approximately 0.5% of newborns. In women
aged 35 or over, chromosome abnormalities are detected in about 2% of all pregnancies. Some of the
abnormalities and their clinical consequences will be Discussed in the following sections.
Chondroblastic osteosarcoma of the left zygomatic bone rare case report and ...Prashant Munde
Chondroblastic osteosarcoma (COS), a subgroup of intramedullary
osteosarcoma (OS), is the most common osteosarcoma that occurs in
adolescents and early adulthood. The COS has similar clinical and radiological
features to those of conventional OS. We present a case of 20‑year‑old male
patient with the chief complaint of pain and swelling in the left zygomatic region.
The computed tomography (CT) and three‑dimensional (3D) CT face showed
erosion, calcific foci, sunray type of spicules suggestive of OS. On fine‑needle
aspiration cytology (FNAC) examination, initial diagnosis was malignant
chondroid lesion, with differential diagnosis of mesenchymal chrondrosarcoma,
COS on incisional biopsy and finally COS on excisional biopsy. The patient
underwent radical resection of left zygomatic arch, followed by chemotherapy.
Although clinically unsuspected in this unusual site, histopathology along with
immunohistochemistry (IHC) results confirmed the COS. Because zygomatic
location of COS is very rare, this report aimed to discuss clinical, radiographic,
histopathologic, IHC findings and diagnostic pitfalls of COS in light of the
literature.
Orofacial pain in patients with cancer a review Prashant Munde
Orofacial pain is commonly associated with cancer and may motivate patients to seek care from an oral and maxillofacial surgeon. Pain may be a presenting symptom of primary tumors, metastatic disease, systemic cancer, or distant non-metastasized cancer. Patients with head and neck cancer undergoing therapy may suffer treatment-induced complications, which are often associated with acute pain. Following cancer therapy, permanent changes to tissues may cause late effects of treatment that may result in chronic orofacial pains. Oral and maxillofacial surgeons should be knowledgeable regarding these orofacial pain presentations.Orofacial pain is commonly associated with cancer and may motivate patients to seek care from an oral and maxillofacial surgeon. Pain may be a presenting symptom of primary tumors, metastatic disease, systemic cancer, or distant non-metastasized cancer. Patients with head and neck cancer undergoing therapy may suffer treatment-induced complications, which are often associated with acute pain. Following cancer therapy, permanent changes to tissues may cause late effects of treatment that may result in chronic orofacial pains. Oral and maxillofacial surgeons should be knowledgeable regarding these orofacial pain presentations.
Most deep fungal infections have their primary foci in the lungs, therefore those presenting with distant organs or skin involvement should be managed aggressively as untreated or severe disease can lead to severe scarring, disfigurement and even death.
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Ozempic: Preoperative Management of Patients on GLP-1 Receptor Agonists Saeid Safari
Preoperative Management of Patients on GLP-1 Receptor Agonists like Ozempic and Semiglutide
ASA GUIDELINE
NYSORA Guideline
2 Case Reports of Gastric Ultrasound
Title: Sense of Smell
Presenter: Dr. Faiza, Assistant Professor of Physiology
Qualifications:
MBBS (Best Graduate, AIMC Lahore)
FCPS Physiology
ICMT, CHPE, DHPE (STMU)
MPH (GC University, Faisalabad)
MBA (Virtual University of Pakistan)
Learning Objectives:
Describe the primary categories of smells and the concept of odor blindness.
Explain the structure and location of the olfactory membrane and mucosa, including the types and roles of cells involved in olfaction.
Describe the pathway and mechanisms of olfactory signal transmission from the olfactory receptors to the brain.
Illustrate the biochemical cascade triggered by odorant binding to olfactory receptors, including the role of G-proteins and second messengers in generating an action potential.
Identify different types of olfactory disorders such as anosmia, hyposmia, hyperosmia, and dysosmia, including their potential causes.
Key Topics:
Olfactory Genes:
3% of the human genome accounts for olfactory genes.
400 genes for odorant receptors.
Olfactory Membrane:
Located in the superior part of the nasal cavity.
Medially: Folds downward along the superior septum.
Laterally: Folds over the superior turbinate and upper surface of the middle turbinate.
Total surface area: 5-10 square centimeters.
Olfactory Mucosa:
Olfactory Cells: Bipolar nerve cells derived from the CNS (100 million), with 4-25 olfactory cilia per cell.
Sustentacular Cells: Produce mucus and maintain ionic and molecular environment.
Basal Cells: Replace worn-out olfactory cells with an average lifespan of 1-2 months.
Bowman’s Gland: Secretes mucus.
Stimulation of Olfactory Cells:
Odorant dissolves in mucus and attaches to receptors on olfactory cilia.
Involves a cascade effect through G-proteins and second messengers, leading to depolarization and action potential generation in the olfactory nerve.
Quality of a Good Odorant:
Small (3-20 Carbon atoms), volatile, water-soluble, and lipid-soluble.
Facilitated by odorant-binding proteins in mucus.
Membrane Potential and Action Potential:
Resting membrane potential: -55mV.
Action potential frequency in the olfactory nerve increases with odorant strength.
Adaptation Towards the Sense of Smell:
Rapid adaptation within the first second, with further slow adaptation.
Psychological adaptation greater than receptor adaptation, involving feedback inhibition from the central nervous system.
Primary Sensations of Smell:
Camphoraceous, Musky, Floral, Pepperminty, Ethereal, Pungent, Putrid.
Odor Detection Threshold:
Examples: Hydrogen sulfide (0.0005 ppm), Methyl-mercaptan (0.002 ppm).
Some toxic substances are odorless at lethal concentrations.
Characteristics of Smell:
Odor blindness for single substances due to lack of appropriate receptor protein.
Behavioral and emotional influences of smell.
Transmission of Olfactory Signals:
From olfactory cells to glomeruli in the olfactory bulb, involving lateral inhibition.
Primitive, less old, and new olfactory systems with different path
Anti ulcer drugs and their Advance pharmacology ||
Anti-ulcer drugs are medications used to prevent and treat ulcers in the stomach and upper part of the small intestine (duodenal ulcers). These ulcers are often caused by an imbalance between stomach acid and the mucosal lining, which protects the stomach lining.
||Scope: Overview of various classes of anti-ulcer drugs, their mechanisms of action, indications, side effects, and clinical considerations.
Explore natural remedies for syphilis treatment in Singapore. Discover alternative therapies, herbal remedies, and lifestyle changes that may complement conventional treatments. Learn about holistic approaches to managing syphilis symptoms and supporting overall health.
Title: Sense of Taste
Presenter: Dr. Faiza, Assistant Professor of Physiology
Qualifications:
MBBS (Best Graduate, AIMC Lahore)
FCPS Physiology
ICMT, CHPE, DHPE (STMU)
MPH (GC University, Faisalabad)
MBA (Virtual University of Pakistan)
Learning Objectives:
Describe the structure and function of taste buds.
Describe the relationship between the taste threshold and taste index of common substances.
Explain the chemical basis and signal transduction of taste perception for each type of primary taste sensation.
Recognize different abnormalities of taste perception and their causes.
Key Topics:
Significance of Taste Sensation:
Differentiation between pleasant and harmful food
Influence on behavior
Selection of food based on metabolic needs
Receptors of Taste:
Taste buds on the tongue
Influence of sense of smell, texture of food, and pain stimulation (e.g., by pepper)
Primary and Secondary Taste Sensations:
Primary taste sensations: Sweet, Sour, Salty, Bitter, Umami
Chemical basis and signal transduction mechanisms for each taste
Taste Threshold and Index:
Taste threshold values for Sweet (sucrose), Salty (NaCl), Sour (HCl), and Bitter (Quinine)
Taste index relationship: Inversely proportional to taste threshold
Taste Blindness:
Inability to taste certain substances, particularly thiourea compounds
Example: Phenylthiocarbamide
Structure and Function of Taste Buds:
Composition: Epithelial cells, Sustentacular/Supporting cells, Taste cells, Basal cells
Features: Taste pores, Taste hairs/microvilli, and Taste nerve fibers
Location of Taste Buds:
Found in papillae of the tongue (Fungiform, Circumvallate, Foliate)
Also present on the palate, tonsillar pillars, epiglottis, and proximal esophagus
Mechanism of Taste Stimulation:
Interaction of taste substances with receptors on microvilli
Signal transduction pathways for Umami, Sweet, Bitter, Sour, and Salty tastes
Taste Sensitivity and Adaptation:
Decrease in sensitivity with age
Rapid adaptation of taste sensation
Role of Saliva in Taste:
Dissolution of tastants to reach receptors
Washing away the stimulus
Taste Preferences and Aversions:
Mechanisms behind taste preference and aversion
Influence of receptors and neural pathways
Impact of Sensory Nerve Damage:
Degeneration of taste buds if the sensory nerve fiber is cut
Abnormalities of Taste Detection:
Conditions: Ageusia, Hypogeusia, Dysgeusia (parageusia)
Causes: Nerve damage, neurological disorders, infections, poor oral hygiene, adverse drug effects, deficiencies, aging, tobacco use, altered neurotransmitter levels
Neurotransmitters and Taste Threshold:
Effects of serotonin (5-HT) and norepinephrine (NE) on taste sensitivity
Supertasters:
25% of the population with heightened sensitivity to taste, especially bitterness
Increased number of fungiform papillae
Couples presenting to the infertility clinic- Do they really have infertility...Sujoy Dasgupta
Dr Sujoy Dasgupta presented the study on "Couples presenting to the infertility clinic- Do they really have infertility? – The unexplored stories of non-consummation" in the 13th Congress of the Asia Pacific Initiative on Reproduction (ASPIRE 2024) at Manila on 24 May, 2024.
Pulmonary Thromboembolism - etilogy, types, medical- Surgical and nursing man...VarunMahajani
Disruption of blood supply to lung alveoli due to blockage of one or more pulmonary blood vessels is called as Pulmonary thromboembolism. In this presentation we will discuss its causes, types and its management in depth.
New Directions in Targeted Therapeutic Approaches for Older Adults With Mantl...i3 Health
i3 Health is pleased to make the speaker slides from this activity available for use as a non-accredited self-study or teaching resource.
This slide deck presented by Dr. Kami Maddocks, Professor-Clinical in the Division of Hematology and
Associate Division Director for Ambulatory Operations
The Ohio State University Comprehensive Cancer Center, will provide insight into new directions in targeted therapeutic approaches for older adults with mantle cell lymphoma.
STATEMENT OF NEED
Mantle cell lymphoma (MCL) is a rare, aggressive B-cell non-Hodgkin lymphoma (NHL) accounting for 5% to 7% of all lymphomas. Its prognosis ranges from indolent disease that does not require treatment for years to very aggressive disease, which is associated with poor survival (Silkenstedt et al, 2021). Typically, MCL is diagnosed at advanced stage and in older patients who cannot tolerate intensive therapy (NCCN, 2022). Although recent advances have slightly increased remission rates, recurrence and relapse remain very common, leading to a median overall survival between 3 and 6 years (LLS, 2021). Though there are several effective options, progress is still needed towards establishing an accepted frontline approach for MCL (Castellino et al, 2022). Treatment selection and management of MCL are complicated by the heterogeneity of prognosis, advanced age and comorbidities of patients, and lack of an established standard approach for treatment, making it vital that clinicians be familiar with the latest research and advances in this area. In this activity chaired by Michael Wang, MD, Professor in the Department of Lymphoma & Myeloma at MD Anderson Cancer Center, expert faculty will discuss prognostic factors informing treatment, the promising results of recent trials in new therapeutic approaches, and the implications of treatment resistance in therapeutic selection for MCL.
Target Audience
Hematology/oncology fellows, attending faculty, and other health care professionals involved in the treatment of patients with mantle cell lymphoma (MCL).
Learning Objectives
1.) Identify clinical and biological prognostic factors that can guide treatment decision making for older adults with MCL
2.) Evaluate emerging data on targeted therapeutic approaches for treatment-naive and relapsed/refractory MCL and their applicability to older adults
3.) Assess mechanisms of resistance to targeted therapies for MCL and their implications for treatment selection
The prostate is an exocrine gland of the male mammalian reproductive system
It is a walnut-sized gland that forms part of the male reproductive system and is located in front of the rectum and just below the urinary bladder
Function is to store and secrete a clear, slightly alkaline fluid that constitutes 10-30% of the volume of the seminal fluid that along with the spermatozoa, constitutes semen
A healthy human prostate measures (4cm-vertical, by 3cm-horizontal, 2cm ant-post ).
It surrounds the urethra just below the urinary bladder. It has anterior, median, posterior and two lateral lobes
It’s work is regulated by androgens which are responsible for male sex characteristics
Generalised disease of the prostate due to hormonal derangement which leads to non malignant enlargement of the gland (increase in the number of epithelial cells and stromal tissue)to cause compression of the urethra leading to symptoms (LUTS
Flu Vaccine Alert in Bangalore Karnatakaaddon Scans
As flu season approaches, health officials in Bangalore, Karnataka, are urging residents to get their flu vaccinations. The seasonal flu, while common, can lead to severe health complications, particularly for vulnerable populations such as young children, the elderly, and those with underlying health conditions.
Dr. Vidisha Kumari, a leading epidemiologist in Bangalore, emphasizes the importance of getting vaccinated. "The flu vaccine is our best defense against the influenza virus. It not only protects individuals but also helps prevent the spread of the virus in our communities," he says.
This year, the flu season is expected to coincide with a potential increase in other respiratory illnesses. The Karnataka Health Department has launched an awareness campaign highlighting the significance of flu vaccinations. They have set up multiple vaccination centers across Bangalore, making it convenient for residents to receive their shots.
To encourage widespread vaccination, the government is also collaborating with local schools, workplaces, and community centers to facilitate vaccination drives. Special attention is being given to ensuring that the vaccine is accessible to all, including marginalized communities who may have limited access to healthcare.
Residents are reminded that the flu vaccine is safe and effective. Common side effects are mild and may include soreness at the injection site, mild fever, or muscle aches. These side effects are generally short-lived and far less severe than the flu itself.
Healthcare providers are also stressing the importance of continuing COVID-19 precautions. Wearing masks, practicing good hand hygiene, and maintaining social distancing are still crucial, especially in crowded places.
Protect yourself and your loved ones by getting vaccinated. Together, we can help keep Bangalore healthy and safe this flu season. For more information on vaccination centers and schedules, residents can visit the Karnataka Health Department’s official website or follow their social media pages.
Stay informed, stay safe, and get your flu shot today!
2. Presented by:
Dr.Prashant Munde
( MDS- I )
Guided by :
Dr. Mrs. SHUBHANGI KHANDEKAR
( PROFESSOR & GUIDE )
Dr. Mrs. ALKA DIVE
( PROFESSOR & H.O.D)
3. Hemorrhagic Disorders
Hemorrhagic or Bleeding disorders are a group of
conditions in which there is a problem with the body's
blood clotting process.
These disorders can lead to heavy and prolonged bleeding
after an injury. Bleeding can also begin on its own.
Defects in blood coagulation usually give abnormal
coagulation tests and C.T.
4. Causes
Normal blood clotting involves coagulation factors
which act together with other chemicals to form
fibrin that stops bleeding.
Problems can occur when certain coagulation
factors are low or missing.
Bleeding disorders can also result from having
poorly working or too few platelets.
5. Some bleeding disorders are present at birth and
are passed through families (inherited).
Others develop from:
Illnesses such as vitamin K deficiency or severe
liver disease.
Treatments such as the use of drugs to stop blood
clots (anticoagulants) or the long-term use of
antibiotics.
6. Diagnosis of Hemorrhagic Disorders
Present history: Rash following infection, abdominal and
joint pain.
Family History: For evidence of inheritance of any
bleeding tendencies.
Past History: Excessive, prolonged bleeding of the
surgical interventions as tonsillectomy, circumcision
or tooth extraction.
Physical Examination: General condition, type and
distribution of the rash, fever, organ enlargement,
lymph glands.
7. Hemorrhagic disorders
Excessive bleeding can result from
(1) Increased fragility of vessels,
(2) Platelet deficiency or dysfunction, and
(3) Derangement of coagulation, alone or in combination.
Common laboratory tests used in the evaluation of a bleeding
disorders are the following:
8. Screening tests:
Bleeding Time
Complete blood count (CBC)
Prothrombin Time
Activated partial thromboplastin time
Thrombin Time
Fibrinogen activity test
Tests of Hemorrhagic Disorders
10. Bleeding time
oBleeding time - The time when the incision is made until all
bleeding has stopped is measured and is called the bleeding time.
o Used to assess platelet function.
oA prolonged bleeding time may be a result from decreased
number of thrombocytes or impaired blood vessels.
o However, the depth of the puncture or incision may be the
source of error.
11. Methods
Duke Method
o With the Duke method, the patient is pricked with a needle or
lancet, on fingertip, after swabbed with alcohol.
o The prick is about 3–4 mm deep.
o Every 30 seconds, filter paper or a paper towel is used to
wipes the blood .
o Normal values- is about 2–5 minutes.
12. Ivy method
In the Ivy method, the blood pressure cuff is placed on
upper arm and inflated to 40 mmHg.
A lancet is used to make a shallow incision on the
underside of the forearm.
Every 30 seconds, filter paper or a paper towel is used to
draw off the blood.
Normal values - 3 – 10 minutes
13. Interpretation
Bleeding time is affected by platelet function, certain vascular
disorders and von Willebrand Disease—not by other coagulation
factors such as hemophilia.
Diseases that cause prolonged bleeding time include
Thrombocytopenia,
Disorders of platelet function
Disseminated intravascular coagulation (DIC),
Acute Leukemia
Aplastic anemia
Liver diseases
14. Aspirin and other cyclooxygenase inhibitors can prolong
bleeding time significantly.
While warfarin and heparin have their major effects on
coagulation factors, an increased bleeding time.
People with von Willebrand disease usually experience
increased bleeding time, as von Willebrand factor is a
platelet adhesion protein, but this is not considered an
effective diagnostic test for this condition.
16. Complete blood count (CBC)
RBC count
WBC count
The total amount of hemoglobin in the blood
The fraction of the blood composed of red blood cells (hematocrit)
The platelet count.
The CBC test also provides information about:
Average red blood cell size (MCV)
Hemoglobin amount per red blood cell (MCH)
The amount of hemoglobin relative to the size of cell (hemoglobin
concentration) per red blood cell (MCHC).
17. A complete blood count (CBC) is used to detect or monitor many
different health conditions.
Diagnose infections or allergies
Detect blood clotting problems or blood disorders, including
anemia.
Evaluate red blood cell production or destruction.
The CBC interpretation are useful in the diagnosis of various
types of anemias.
It can reflect acute or chronic infection, allergies, and problems
with blood clotting.
18. Normal Results
Blood counts may vary with altitude. In general, normal
results are:
RBC count:
Male: 4.7 to 6.1 million cells/mcL
Female: 4.2 to 5.4 million cells/mcL
WBC count:
4,500 to 10,000 cells/mcL
Hematocrit:
Male: 40.7 to 50.3%
Female: 36.1 to 44.3%
19. Hemoglobin:
Male: 13.8 to 17.2 gm/dL
Female: 12.1 to 15.1 gm/dL
Red blood cell indices:
MCV: 80 to 95 femtoliter
MCH: 27 to 31 pg/cell
MCHC: 32 to 36 gm/dL
20. Abnormal Results
A high RBC or hematocrit may be due to:
Dehydration (such as from severe diarrhea)
Kidney disease with high erythropoietin production
Low oxygen level in the blood for a long time due to
heart or lung disease.
Polycythemia vera
21. A low RBC or hematacrit is a sign of anemia, which can result from:
Autoimmune diseases ( lupus erythematosus or rheumatoid arthritis)
Blood loss (hemorrhage)
Bone marrow failure ( from radiation, infection, or tumor)
Chronic kidney disease
Hemolysis (red blood cell destruction)
Leukemia and other blood cancers
Long-term infections such as hepatitis
Poor diet and nutrition, causing too little iron, folate, vitamin B12, or
vitamin B6
22. A lower than normal white blood cell count is called
leucopenia.
A decreased WBC count may be due to:
Autoimmune diseases (such as systemic lupus
erythematosus)
Bone marrow failure (for example, due to infection,
tumor, radiation, or fibrosis)
Disease of the liver or spleen
23. High numbers of WBCs is called leukocytosis.
It can result from:
Infectious diseases
Inflammatory disease (such as rheumatoid
arthritis or allergy)
Leukemia
Severe emotional or physical stress
Tissue damage (such as burns)
24. A complete blood count with differential WBC Count will
also include:
Neutrophil — May indicate bacterial infection.
May also be raised in acute viral infections.
Eosinophilic — Increased in parasitic infections, asthma,
or allergic reaction.
25. Basophil — May be increased in bone marrow related conditions
such as leukemia or lymphoma.
Lymphocytes — Higher with some viral infections such as
glandular fever and raised in chronic lymphocytic leukemia (CLL).
Can be decreased by HIV infection.
Monocytes — May be raised in bacterial infection, tuberculosis,
malaria, Rocky Mountain spotted fever, monocytic leukemia,
chronic ulcerative colitis and regional enteritis .
26. Platelet counts
These are obtained on anticoagulated blood using an electronic
particle counter.
The reference range is 1.5 to 4 lac platelets/mm3.
Bleeding resulting from thrombocytopenia is associated with a
normal PT and PTT.
NORMAL 100,000 - 400,000 Cells/mm3
< 100,000 Thrombocytopenia
50,000 - 100,000 Mild Thrombocytopenia
< 20,000 SevereThrombocytopenia Spontaneous bleeding
Bleed after major trauma
Bleed after minor trauma
27. Counts well outside this range should be confirmed by a
visual inspection of a peripheral blood smear, since
clumping of platelets can cause “thrombocytopenia”
during automated counting, and high counts may be
indicative of a myeloproliferative disorder, such as
essential thrombocythemia.
28. Increase platelet counts can be due to :
Essential (primary)
Essential thrombocytosis (a form of myeloproliferative
disease)
Other myeloproliferative disorders such as chronic
myelogenous leukemia, polycythemia vera, myelofibrosis
It manifests clinically with elevated platelet counts and is
separated from PCV and primary myelofibrosis based on the
absence of polycythemia and marrow fibrosis, respectively. In
those cases without tyrosine kinase mutations, causes of reactive
thrombocytosis, such as inflammatory disorders and iron
deficiency, must be excluded before the diagnosis can be
established.
29. Reactive (secondary)
Inflammation
Surgery (which leads to an inflammatory state)
Hyposplenism (decreased breakdown due to decreased
function of the spleen)
Splenectomy
Iron deficiency anemia or hemorrhage
30. Decreased platelet counts can be due to
Idiopathic thrombocytopenic purpura
Thrombotic thrombocytopenic purpura
Disseminated intravascular coagulation
Systemic lupus erythematosus
Vitamin B12 or folic acid deficiency
Leukemia or myelodysplastic syndrome
Sepsis, systemic viral or bacterial infection
chemotherapy drugs
Valproic acid, Methotrexate, Interferon,Isotretinoin
31. Tests of platelet function
At present, no single test provides an adequate
assessment of the complex functions of platelets.
One older test, the bleeding time, which measures the time
taken for a standardized skin puncture to stop bleeding,
has some value but is time-consuming, difficult to perform
well, and not a good predictor of bleeding during
haemostatic stresses such as surgery.
As a result of these limitations, the use of the bleeding time
has declined considerably in recent years.
32. Newer instrument-based assays designed to measure platelet
function under conditions of high shear stress show promise
but at present are also less than ideal screening tests.
Other specialized tests that can be useful in particular clinical
settings include
Tests of platelet aggregation, which measure the ability of
platelets to aggregate in response to agonists like thrombin;
and quantitative and qualitative tests of von Willebrand
factor, which play an important role in platelet adhesion to
the extracellular matrix.
33. More specialized tests are available to
measure the levels of specific clotting
factors, fibrinogen, fibrin split products, and
the presence of circulating anticoagulants.
35. Routine tests of blood coagulation, such as the
Prothrombin time (PT),
Activated partial thromboplastin time (aPTT), and
Thrombin time (TT)
are frequently ordered to assess clotting function in
patients.
37. oThe prothrombin time is the time it takes plasma to clot after
addition of tissue factor.
oThis measures the quality of the extrinsic pathway (as well as
the common pathway) of coagulation.
oThey are used to determine the clotting tendency of blood, in
the measure of warfarin dosage, liver damage, and vitamin K
status.
Prothrombin time (PT)
38. oPT measures factors I (fibrinogen), II (prothrombin),
V, VII, and X.
o It is used in conjunction with the activated partial
thromboplastin time (aPTT) which measures the intrinsic
pathway.
oNormal range
oThe reference range for prothrombin time is usually
around 12-13 seconds, and the INR in absence of
anticoagulation therapy is 0.8-1.2.
39. Interpretation
•The prothrombin time can be prolonged as a result of
Deficiencies in vitamin K,
• warfarin therapy,
•Malabsorption, or lack of intestinal colonization by
bacteria (such as in newborns).
•Poor factor VII synthesis (due to liver disease) or
•Increased consumption (in disseminated intravascular
coagulation) may prolong the PT.
40. •The INR is typically used to monitor patients on warfarin
or related oral anticoagulant therapy.
•The normal range of INR for a healthy person not using
warfarin is 0.8–1.2 sec., and for people on warfarin therapy
2 –3 sec.
•High INR indicates a higher risk of bleeding, while a low
INR suggests a higher risk of developing a clot.
42. oThe partial thromboplastin time (PTT) or activated partial
thromboplastin time (aPTT or APTT) test assesses both the
intrinsic and common clotting pathways.
The clotting of plasma after addition of kaolin, cephalin, and Ca [2]
+ ions is measured in seconds.
Kaolin activates the contact dependent factor XII, and cephalin
substitutes for platelet phospholipids.
ACTIVATED PARTIAL THROMBOPLASTIN TIME
43. oApart from detecting abnormalities in blood clotting,it is
also used to monitor the treatment effects with heparin, a
major anticoagulant. It is used in conjunction with the
prothrombin time (PT) which measures the extrinsic pathway.
o Prolongation of the PTT can be due to deficiency or
dysfunction of factors V, VIII, IX, X, XI, or XII,
prothrombin, or fibrinogen.
44. •Interpretation
•The typical reference range is between 30 seconds and 50 s.
•Shortening of the PTT is considered to have little clinical
relevance, but it might increase risk of thromboembolism.
•Normal PTT times require the presence of coagulation factors:
• I, II, V, VIII, IX, X, XI, & XII.
•Deficiencies in factors VII or XIII will not be detected with
PTT test.
45. •Prolonged APTT may indicate:
•use of heparin (or contamination of the sample)
•Antiphospholipid antibody (especially lupus anticoagulant,
which paradoxically increases propensity to thrombosis)
•coagulation factor deficiency (e.g. hemophilia)
•Sepsis - coagulation factor consumption
•Presence of antibodies against coagulation factors
(Factor inhibitors)
46. Mixing test
Patient plasma
Normal plasma
PTT
Correctable PTT Factor deficiency
• If the abnormality does not disappear, the sample is said to contain
an "inhibitor" (either heparin, antiphospholipid antibodies or
coagulation factor specific inhibitors), while if it does correct a
factor deficiency is more likely.
48. •The thrombin time (TT), measures the time it takes for a
clot to form in the plasma of a blood sample containing
anticoagulant, after an excess of thrombin has been added.
•It is used to diagnose blood coagulation disorders and to
assess the effectiveness of fibrinolytic therapy.
•This test is repeated with pooled plasma from normal
patients.
Thrombin time
49. •The difference in time between the test and the 'normal'
indicates an abnormality in the conversion of fibrinogen to
fibrin.
•Normal values for thrombin time are 12 to 14 seconds.
•Thrombin time can be prolonged by heparin, fibrin
degradation products, factor XIII deficiency, and
fibrinogen deficiency or abnormality.
51. A fibrinogen activity test is ordered as part of an
investigation of a possible bleeding disorder or
thrombotic episode.
It may be ordered as a follow-up to an abnormal
Prothrombin Time (PT) or Partial Thromboplastin Time
(PTT) and/or an episode of prolonged or unexplained
bleeding.
FIBRINOGEN ACTIVITY TEST
52. •It may be measured, along with tests such as PT, PTT, platelet
function tests, fibrin degradation products (FDP), and D-dimer
to help diagnose disseminated intravascular coagulation (DIC)
or abnormal fibrinolysis.
•Fibrinogen activity test is ordered to help monitor the status
of a progressive disease (such as liver disease) over time.
•Sometimes this test is ordered, along with other cardiac risk
markers such as C-reactive protein (CRP), to help determine a
person's overall risk of developing cardiovascular disease.
53. • Fibrinogen levels can be measured in venous blood.
• Normal levels are about 1.5-3 g/L, depending on the
method used.
• Higher levels are, amongst others, associated with
cardiovascular disease (>3.43 g/L).
• It may be elevated in any form of inflammation, as it is
an acute-phase protein; for example, it is especially
apparent in human gingival tissue during the initial phase
of periodontal disease.
54. •Low levels of fibrinogen can indicate a systemic activation
of the clotting system, with consumption of clotting
factors faster than synthesis.
• This excessive clotting factor consumption condition is
known as disseminated intravascular coagulation or "DIC.“
• In DIC low fibrinogen levels with prolonged clotting
times (PT or aPTT), in the context of acute critical illness
such as sepsis or trauma.
55. Fibrinogen levels are increased in:
Increasing age
Female sex, pregnancy, oral contraception
In post-menopausal women
Acute phase reaction
Disseminated malignancy
56. Fibrinogen levels are reduced in:
DIC due the the consumption of clotting factors.
Liver disease due to decreased synthesis.
Massive transfusion
Inherited deficiencies e.g. Hypofibrinogenaemia, afibrinogenaemia
and dysfibrinogenaemia
Following thrombolytic therapy
In some patients following treatment with asparaginase
58. Clotting Factor Tests
Clotting factor tests, also called factor assays, are
required to diagnose a bleeding disorder.
This blood test shows the type of hemophilia and the
severity.
It is important to know the type and severity in order
to create the best treatment plan.
59. Haemophilia A and Haemophilia B:
Activated partial thromboplastin time (APTT);
prolongation depends on the severity of the factor
deficiency.
Prolonged APTT plus prolonged bleeding suggests von
Willebrand's disease
factor VIII clotting assay - low levels in Haemophilia A
factor IX clotting assay - low levels in Haemophilia B
In severe cases of Haemophilia B whole blood
coagulation time is increased
60. The severity of vWD varies and many patients will never be
diagnosed, as their disorder may never come to light.
In practice - both primary and secondary - the patients
with more severe forms of the disorder will present with
abnormal bleeding.
Following this, basic blood tests including FBC, clotting
screen and liver function should be performed and patients
should be referred for a specialist opinion and other more
specialised investigations such as plasma levels of vWf.
61. Plasma levels of vWF – Deficiency can be quantitative
or qualitative.
Quantitative deficiency - detected by vWF antigen assay.
Qualitative deficiency - detected by a number of methods
including glycoprotein binding assay, ristocetin cofactor
activity, ristocetin-induced platelet agglutination.
62. Factor VIII measurement:
Factor VIII binds to vWF which in turn prevents the rapid
breakdown of factor VIII; thus, a deficiency of vWF can also
lead to deficiency of factor VIII.
In type 2 vWF - factor VIII levels are normal; studies of
platelet aggregation with sub-endothelium are necessary.
Oestrogens, vasopressin and growth hormone all elevate
levels.
63. These include assays of factor VIII, von Willebrand factor
antigen, von Willebrand factor activity (measured by the
ristocetin cofactor assay), and template bleeding time. In von
Willebrand disease the defect is in von Willebrand factor.
The affected individual may have subnormal levels of
structurally and functionally normal von Willebrand factor (this
is called "classic" or type I von Willebrand disease) or may
produce von Willebrand factor that is structurally and
functionally abnormal (von Willebrand disease type 2).
64. Individuals who inherit a gene for von Willebrand
disease from both parents have severe (type 3) von
Willebrand disease and will have extremely low levels
(< 3%) of von Willebrand factor and factor VIII and
will have a very prolonged bleeding time.
In most populations type I disease is the most
common form, whereas type 3 is the least commonly
encountered form.
It should be noted that levels of von Willebrand
factor can be influenced by the patient's blood type
(persons who have blood type AB have 60% to 70%
higher levels than do persons who have blood type O)
and can be elevated during pregnancy, stress, and
hyperthyroidism.
65. Disseminated intravascular coagulation
Diagnosis is usually suggested by-
Severe cases with hemorrhage:
The PT and APTT are usually very prolonged and the fibrinogen
level markedly reduced.
High levels of fibrin degradation products, including D-dimer.
66. There is severe thrombocytopenia.
The blood film may show fragmented red blood cells
(schistocytes).
Mild cases without bleeding:
There is increased synthesis of coagulation factors and
platelets.
PT, APTT, and platelet counts are normal.
Fibrin degradation products are raised.
67. Clinical assessment, pertinent history, and family
history are good indicators for determining patient's
bleeding tendencies.
The most appropriate laboratory tests performed are
Routine screening tests include a complete blood cell
count, platelet count, and evaluation of a peripheral
blood sample, a prothrombin time, and an activated
partial thromboplastin time.
Summary