A presentation made about Sickle cell disease by Yara Mostafa, Yasser Osama, Yaser Mostafa ,Ain shams university, Medicine faculty, first year students.
This a series of notes on hematology useful for undergraduate and postgraduate medical and paramedical students. Notes are prepared from standard texts and are easy to reproduce in exams.
A presentation made about Sickle cell disease by Yara Mostafa, Yasser Osama, Yaser Mostafa ,Ain shams university, Medicine faculty, first year students.
This a series of notes on hematology useful for undergraduate and postgraduate medical and paramedical students. Notes are prepared from standard texts and are easy to reproduce in exams.
aplastic anemia pediatrics
It compromises a group of disorders of the hematopoietic stem cells resulting in the suppression of one or more of erythroid, myeloid and megakaryotic cell lines.
thrombocytopenia
Sickle cell anemia is a disease in which
your body produces abnormally shaped red blood cells. The cells are shaped like
a crescent or sickle. They don't last as long as normal, round red blood cells,
which leads to anemia.
The sickle cells also get stuck in blood vessels, blocking blood flow. This can
cause pain and organ damage.
A genetic problem causes sickle cell
anemia. People with the disease are born with two sickle cell genes, one from
each parent. If you only have one sickle cell gene, it's called sickle cell
trait. About 1 in 12 African Americans has sickle cell trait. A blood test can
show if you have the trait or anemia. Most states test newborn babies as part
of their newborn screening programs.
aplastic anemia pediatrics
It compromises a group of disorders of the hematopoietic stem cells resulting in the suppression of one or more of erythroid, myeloid and megakaryotic cell lines.
thrombocytopenia
Sickle cell anemia is a disease in which
your body produces abnormally shaped red blood cells. The cells are shaped like
a crescent or sickle. They don't last as long as normal, round red blood cells,
which leads to anemia.
The sickle cells also get stuck in blood vessels, blocking blood flow. This can
cause pain and organ damage.
A genetic problem causes sickle cell
anemia. People with the disease are born with two sickle cell genes, one from
each parent. If you only have one sickle cell gene, it's called sickle cell
trait. About 1 in 12 African Americans has sickle cell trait. A blood test can
show if you have the trait or anemia. Most states test newborn babies as part
of their newborn screening programs.
Interactive talk on common hematological and oncological emergencies - which if not noticed early can lead to irreversible complications and death .
Intended to be used for educational purposes for the fertile minds in medicine .
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
- Video recording of this lecture in English language: https://youtu.be/lK81BzxMqdo
- Video recording of this lecture in Arabic language: https://youtu.be/Ve4P0COk9OI
- Link to download the book free: https://nephrotube.blogspot.com/p/nephrotube-nephrology-books.html
- Link to NephroTube website: www.NephroTube.com
- Link to NephroTube social media accounts: https://nephrotube.blogspot.com/p/join-nephrotube-on-social-media.html
These lecture slides, by Dr Sidra Arshad, offer a quick overview of physiological basis of a normal electrocardiogram.
Learning objectives:
1. Define an electrocardiogram (ECG) and electrocardiography
2. Describe how dipoles generated by the heart produce the waveforms of the ECG
3. Describe the components of a normal electrocardiogram of a typical bipolar leads (limb II)
4. Differentiate between intervals and segments
5. Enlist some common indications for obtaining an ECG
Study Resources:
1. Chapter 11, Guyton and Hall Textbook of Medical Physiology, 14th edition
2. Chapter 9, Human Physiology - From Cells to Systems, Lauralee Sherwood, 9th edition
3. Chapter 29, Ganong’s Review of Medical Physiology, 26th edition
4. Electrocardiogram, StatPearls - https://www.ncbi.nlm.nih.gov/books/NBK549803/
5. ECG in Medical Practice by ABM Abdullah, 4th edition
6. ECG Basics, http://www.nataliescasebook.com/tag/e-c-g-basics
Ethanol (CH3CH2OH), or beverage alcohol, is a two-carbon alcohol
that is rapidly distributed in the body and brain. Ethanol alters many
neurochemical systems and has rewarding and addictive properties. It
is the oldest recreational drug and likely contributes to more morbidity,
mortality, and public health costs than all illicit drugs combined. The
5th edition of the Diagnostic and Statistical Manual of Mental Disorders
(DSM-5) integrates alcohol abuse and alcohol dependence into a single
disorder called alcohol use disorder (AUD), with mild, moderate,
and severe subclassifications (American Psychiatric Association, 2013).
In the DSM-5, all types of substance abuse and dependence have been
combined into a single substance use disorder (SUD) on a continuum
from mild to severe. A diagnosis of AUD requires that at least two of
the 11 DSM-5 behaviors be present within a 12-month period (mild
AUD: 2–3 criteria; moderate AUD: 4–5 criteria; severe AUD: 6–11 criteria).
The four main behavioral effects of AUD are impaired control over
drinking, negative social consequences, risky use, and altered physiological
effects (tolerance, withdrawal). This chapter presents an overview
of the prevalence and harmful consequences of AUD in the U.S.,
the systemic nature of the disease, neurocircuitry and stages of AUD,
comorbidities, fetal alcohol spectrum disorders, genetic risk factors, and
pharmacotherapies for AUD.
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
micro teaching on communication m.sc nursing.pdfAnurag Sharma
Microteaching is a unique model of practice teaching. It is a viable instrument for the. desired change in the teaching behavior or the behavior potential which, in specified types of real. classroom situations, tends to facilitate the achievement of specified types of objectives.
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.
ARTIFICIAL INTELLIGENCE IN HEALTHCARE.pdfAnujkumaranit
Artificial intelligence (AI) refers to the simulation of human intelligence processes by machines, especially computer systems. It encompasses tasks such as learning, reasoning, problem-solving, perception, and language understanding. AI technologies are revolutionizing various fields, from healthcare to finance, by enabling machines to perform tasks that typically require human intelligence.
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2. Prevalence/Incidence of SCD
In African-Americans the incidence of SCD is 1 in
375 for HbSS, 1 in 835 for HbSC and 1 in 1,667 for
Sickle beta-thalassemia. In addition, 1 in 12
African-Americans are carriers for the disorder
In other U.S. populations, the prevalence of sickle
cell disease is 1 in 58,000 Caucasians; 1 in 1,100
Hispanics (eastern states); 1 in 32,000 Hispanics
(western states); 1 in 11,500 Asians; and 1 in 2,700
Native Americans
4. What Is Sickle Cell Disease?
An inherited disease of red
blood cells
Affects hemoglobin
Polymerization of hemoglobin
leads to a cascade of effects
decreasing blood flow
Tissue hypoxia causes acute
and chronic damage
β-globin gene (chromosome 11q)
mutation GAGGTG at 6th codon
Glutamic Acid Valine at the 6th amino
acid along the β-globin chain
5. Why Do Cells Sickle?
Sickling Mechanism
1. Deoxygenation HgbS protein
conformational change
2. Hydrophobic Valine exposed at
molecular surface
3. Val6 of B2 chain of 1st Hgb S chain
forms hydrophobic bond with
Phe85 and Leu88 of a 2nd Hgb S B1
chain
4. Pairing Hgb S monomers
polymerize to form Hgb S chains
5. Hgb S polymers precipitate in
RBCs as long, rigid fibers.
6. Pathophysiology
HgbS fibers are rigid
Hgb S fibers deform
RBC membranes
Membrane disruption
exposes transmembrane
proteins and lipids that
are pro-inflammatory
Progressive sickling
makes cells dense and
inflexible
Frenette et al., Journal of Clinical Investigation 117(4): 850-858, 2007
7. Pathophysiology
Factors that Promote Hgb S polymerization:
Low pO2 / Hypoxia
Prolonged “Delay Time” – time RBC spends in microcirculation
Low pH
High Hgb S concentration
Genotype-dependent
Cellular “Dehydration”
Volume depletion (total body)
Sickling Activation K+ / Cl- cotransporter and
Gardos Ca2+- activated K+ efflux channels ion and water efflux
Low Hgb F concentration
α2γS: gamma globin chains bind Hgb S chains and inhibit Hgb S
polymerization, thus countering sickling process
8. Normal Vs. Sickle Red Cells
Normal
Disc-Shaped
Deformable
Life span of 120 days
Sickle
Sickle-Shaped
Rigid
Lives for 20 days or less
9. Clinical Syndromes
Disease Severity is Genotype –Dependent
Genotype
Hgb SS
Hgb S / β0 thalassemia
Hgb SC
Hgb S / α thalassemia
Hgb S / D
Hgb S / A
Hgb S / E
Hgb S / β+ thalassemia
Hgb S / HPFH
WorseningDiseaseSeverity
Asymptomatic
+ / - Mild Anemia
10. Interpreting Newborn Screening Results
Sickle Hemoglobinopathies
Screening Results* Associated Disorder
FS SS or Sβ°thalassemia
FSC SC
FSA S ß+ thalassemia
FSE S Hemoglobin E
FS Variant S Variant
FAS Sickle Cell Trait
FAC Hb C Carrier
FAE Hb E Carrier
FA Variant Hb Variant Carrier
onfirmation.
11. Hemolysis and Vaso-occlusion
Vaso-occlusion:
Occurs when the rigid
sickle shaped cells fail to
move through the small
blood vessels, blocking
local blood flow to a
microscopic region of
tissue. Amplified many
times, these episodes
produce tissue hypoxia.
The result is pain, and
often damage to organs.
Hemolysis:
The anemia in SCD is
caused by red cell
destruction, or
hemolysis, and the
degree of anemia varies
widely between patients.
The production of red
cells by the bone marrow
increases
dramatically, but is
unable to keep pace with
the destruction.
12. Chronic Manifestations:
Anemia
Jaundice
Splenomegaly
Functional asplenia
Cardiomegaly and functional
murmurs
Hyposthenuria and enuresis
Proteinemia
Cholelithiasis
Delayed growth and sexual
maturation
Restrictive lung disease*
Pulmonary Hypertension*
Avascular necrosis
Proliferative retinopathy
Leg ulcers
Transfusional hemosiderosis*
Acute Manifestations:
Bacterial Sepsis or meningitis*
Recurrent vaso-occlusive pain
(dactylitis, muscoskeletal or
abdominal pain)
Splenic Sequestration*
Aplastic Crisis*
Acute Chest Syndrome*
Stroke*
Priapism
Hematuria, including papillary
necrosis
Hemolysis and Vaso-occlusion
(continued)
*Potential cause of mortality
13. Fever and Infection
Fever > 38.5° C (101°F)
is an EMERGENCY
Basic laboratory
evaluation:
CBC with differential and
reticulocyte
count, blood, urine, and
throat
cultures, urinalysis, chest
x-ray
Indications for
hospitalization & IV
antibiotics:
-Child appears ill
-Any temperature > 40°C
-Abnormal laboratory
values
Start IV antibiotics
IMMEDIATELY if child
appears ill or temperature
> 40°C (DO NOT WAIT
FOR LABS)
14. Acute Chest Syndrome
Clinically:
Acute onset of fever, respiratory distress, chest
pain, new infiltrate on chest x-ray.
Causes
Infection
Fat emboli
Lung infarct
Since you cannot distinguish between acute chest
syndrome and pneumonia clinically there is no change
in treatment.
A leading cause of death in sickle cell disease
16. Priapism: INVOLUNTARY ERECTION FOR>30 min
STUTTERING&REFRACTORY
Treatment is difficult
Opioid pain medication
Intravenous fluids
Aspiration and irrigation of the corpus
cavernosum(>4hr)
Blood Transfusions
Impotence with severe disease or
recurrent episodes
Prevention: Hydroxyurea,Etilefrine
Surgical shunt procedures
Urethr
a
Corpus cavernosum
Commonly occurs in children and adolescents with SS or SC
Age of onset is 5-35 yrs.
Early morning
17. Stroke: Any focal neuro deficit>24hr&/or↑intT2W MRI
Historically 8 to 10% of
children with SS
“Silent Stroke” in 22% of
children with
hemoglobin SS
Any acute neurologic symptom other than mild headache, even if
transient, requires urgent evaluation.
Treatment: Chronic transfusion therapy to maintain sickle hemoglobin at or
below 30%
18. Splenic Sequestration
Sudden trapping of blood within the spleen
Usually occurs in infants under 2 years of age with
SS
Spleen enlarged ,hypovolemia, Hb↓>2%
,reticulocytosis ,↓pl atelet count,may not be
associated with fever, pain, respiratory, or other
symptoms
Circulatory collapse and death can occur in less
than thirty minutes •Recurrence very common (50%)
•Associated with high mortality (20%)
19. Splenic Sequestration
Hemoglobin SS
Incidence increased: 6 and 36 months
Overall incidence about 30%
Hemoglobin SC
Incidence increased: 2 and 17 years
Mean age 8.9 years
Can occur in adolescence and adulthood
Incidence about 5%
20. Treatments For Splenic
Sequestion
Intravenous fluids
Maintain vascular volume
Cautious blood
transfusion
Treat anemia with 5ml/kg
of PRBC
splenectomy
If indicated
22. PRECIPTATING FACTORS: physical stress, infection
, dehydration,hypoxia ,exposure to cold, acidosis
Pain is an emergency
Hospital evaluation:
Hydration: 1.5 times maintenance unless acute
chest syndrome suspected
Assess pain level and treat
Do not withhold opioids
Frequently reassess pain control
Assess for cause of pain/complications
23. Pain Management
Mild-moderate pain
Acetaminophen
Hepatotoxic
Non-steroidal anti-inflammatory agents
(NSAIDs)
-Contraindicated in patients with gastritis/ulcers
and renal failure
-Monitor renal function if used chronically
24. Pain Management
Moderate-severe pain
Opioids are first-line treatment
Morphine sulfate or hydromorphone
Meperidine NOT recommended
(Metabolite causes seizures & renal toxicity)
Moderate or less severe pain
Acetaminophen or NSAID's in combination with opioids
Other adjuvant medications (sedatives, anxiolytics)
May increase efficacy of analgesics
25. Hand Foot Syndrome - Dactylitis
Early complication of
sickle cell disease
Highest incidence 6
months to 2 years
Painful swelling of hands
and feet
Treatment involves fluids
and pain medication
Fevers treated as medical
emergency
27. Gall Bladder and Liver
Gall stones and biliary sludge
Monitor by ultrasound every 1-2 years
Cholestasis
May progress, leading to bleeding disorders or liver
failure
Iron overload
Due to chronic transfusions
Chronic hepatitis
28. Bone Disease Diagnosis and
Treatment
Avascular necrosis of hips and shoulders
Index of suspicion
Persistent hip or shoulder pain
Plain film or MRI
Treatment
Conservative
NSAID’s and 6 weeks of rest off affected limb
Physical therapy
30. GENETIC COUNSELLING
Who should receive counseling?
-Parents of newborns with sickle disorders or traits
-Pregnant women/ prenatal counseling
What is the purpose of counseling?
-Education
-Informed decision-making
Content should include:
-Genetic basis, chances of disease or trait (potential
pregnancy outcome), disease-related health
problems, variability/unpredictability of disease, family
planning, average life span
31. Health Maintenance Frequent visits: every 3 to 6 months
Immunizations
Routine immunizations
Hib- 6 months and older
23 valent Pneumovax at five years
Penicillin prophylaxis beginning no later than two
months
Nutrition and fluids
Folate supplementation is controversial
32. Health Maintenance
Physical exam with attention to:
Growth and development, jaundice, liver/spleen
size, heart murmur of anemia, malocclusion from
increased bone marrow activity, delayed puberty
Lab evaluations:
CBC with differential and reticulocyte
count, urinalysis, renal & liver function
33. Health Maintenance
Special studies
Brain- Transcranial doppler
ultrasonography, MRI/MRA
Lungs- Pulmonary function tests, Echo
cardiogram for pulmonary hypertension
Neurologic- neuropsychological testing
34. Current Recommendations
Penicillin Prophylaxis: SS, S ºThalassemia
2 months to 3 years: 125 mg PO BID
Over 3 years: 250 mg PO BID
When to discontinue is controversial
Penicillin Prophylaxis: SC and S + Thalassemia
SC warrants penicillin prophylaxis similar to SS
S + Thalassemia: penicillin prophylaxis can be safely
discontinued at 5 years
Routine use in infants and children is controversial
Special Circumstances
History of repeated sepsis, surgical splenectomy
35. Therapy
Hydroxyurea
S-phase cytotoxic, myelosuppressive drug: inhibits ribonucleotide
reductase
Induces proliferation of early erythroid progenitors
Leads to ↑ Hgb F production (α2γ2)
γ subunit production α2 γS does not polymerize
Additional effects of hydroxyurea:
↓ Neutrophil numbers and neutrophil activation
↓ stress reticulocytes, ↓ reticulocyte adhesion
↓ endothelial adhesion properties (↓VCAM-1, ↓ laminin, ↓thrombospondin)
Improved RBC hydration and MCV
Increased [Hgb]
36. Therapy
Hydroxyurea Dosing:
Initiation of Treatment:
Hydroxyurea 15-20mg/kg/day in single daily dose
Check CBC Q 2wks, Hgb F Q 6-8 wks, serum chem Q 2-4 wks
May require
Tx Continuation: If no major toxicity, escalate dose Q 6-8wk by 2.5-5 mg/kg
until desired endpoint reached may go upto 35mg/kg
Reduces painful episodes, ACS by 50%.
Treatment Endpoints:
Decreased pain / pain crises
Hgb F 15-20%
Acceptable myelotoxicity:
<2500 neutrophils / ul
< 90,000 platelets / ul
Hgb < 5.3 g/dL
37. Therapy
Other Hgb F – inducing Agents
Short-chain fatty acids (sodium butyrate)
Mechanism: Histone deacetylation
Baboons: ↑ Hgb F
Phase II study (N=15): 11 responders, Increased Hgb F 7% 21%
5-Azacytidine and 5-Aza-2’deoxycytidine
Mechanism: Demethylation of DNA
9-month Phase I/II study (N=7): Increased Hgb F 3.1% 13.9%
Erythropoietin
38. Therapy
Allogeneic Stem Cell Transplantation
Only Therapy Offering Curative Potential for sickle cell disease
As of 2002, only ~150 patients had undergone SCT
Patient recruitment hindered by:
Difficult pt selection - Absence of early prognostic markers in SCD
Majority of patients do not have donor
High mortality risk of SCT
Risk of long-term treatment-induced malignancy
Risk of GVHD
Pts >16 have demonstrated poor outcomes d/t comorbidities
Two multicentre series of allogeneic SCTs have been undertaken,
1 in US, 1 in Europe