Hematologic Diseases Dental Management Flashcards
Anemia
- Reduction in the oxygen carrying capacity of RBCs; deficiency in red blood cells or of hemoglobin in the blood
Anemia
Classification
– Causes
(3)
- Blood Loss
- Inadequate production
- Excess destruction
Anemia
Classification
– Morphology
(3)
- Normocytic
- Microcytic
- Macrocytic
Laboratory Tests: Anemia
* CBC (Complete Blood Count)
(5)
- Hb*
- Hematocrit*
- WBC
- Platelet
- RBC indices*
- Hb* (Concentration of hemoglobin)
- <— g/dL (men) or <— g/dL (women)
13.5
12.0
- Hematocrit* (Packed cell volume)
- <—% (men) or <—% (women)
41.0
36.0
RBC indices*
(4)
- MCV (mean corpuscular volume)
- MCH (mean cell hemoglobin)
- RDW (red cell distribution width)
- MCHC (mean cell hemoglobin concentration)
Types of Anemia (size)
(3)
- Microcytic
- Macrocytic
- Normocytic
- Microcytic
(2)
– Iron Deficiency Anemia
– Thalassemias
- Macrocytic
(3)
– Pernicious Anemia
– Folate Deficiency
– B12 Deficiency
- Normocytic
(2)
– Hemolytic Anemia
– Sickle Cell Anemia
Iron Deficiency Anemia
(2)
- Microcytic anemia
- More common in women of
childbearing age and children
Iron Deficiency Anemia
* Causes:
blood loss, poor iron
intake, poor iron absorption, or
increased demand for iron
Iron Deficiency Anemia
* Labs:
Serum iron, ferritin, TIBC,
transferrin
Macrocytic (Megaloblastic) Anemias
* Folate Deficiency
–
– Deficiency during pregnancy causes
– Labs:
Not stored in the body in large amounts; continual
dietary supply is needed
neural tube defects in the child
Serum folate level
Macrocytic (Megaloblastic) Anemias
* Cobalamin (B12) Deficiency
(3)
– Pernicious Anemia
– Nitrous Oxide
– Labs: Serum B12
– Pernicious Anemia
- Deficiency of intrinsic factor which is necessary
for B12 absorption
– Nitrous Oxide
(2)
- Irreversible inactivation of B12
- Neurologic symptoms
Anemia: Clinical Presentation
* Systemic
– Symptoms: (5)
– Signs: (3)
Fatigue, weakness,
palpitations, SOB, angina,
tingling of fingers and toes
pallor, splitting and
spooning of fingernails
Anemia: Clinical Presentation
* Oral Manifestations
(2)
– Atrophic glossitis with loss on
tongue papillae, redness or
cheilosis
– Mucosal pallor
Anemia
(3)
–Generally tolerate routine dental treatment well
–Avoid long N20 exposure in patients with B12
deficiency
–Identifying signs and symptoms of anemia
–Generally tolerate routine dental treatment well
* Severe anemia (cardiopulmonary symptoms)
(3)
–Defer routine dental care
–Pulse oximeter and supplemental oxygen
–Avoid strong narcotics
–Identifying signs and symptoms of anemia
* Important to find the cause!
(2)
–GI bleed, chronic inflammation pancytopenia
Sickle Cell Anemia
(3)
- Autosomal recessive inherited
disorder - RBC sickling in low oxygen or low
blood pH environments - Erythrostasis, increased blood
viscosity, reduced blood flow,
vascular occlusion, hypoxiamore
sickling
Sickle Cell Anemia
* Systemic Signs and Symptoms
(7)
– Result of chronic anemia and small blood vessel
occlusion
– Jaundice, pallor
– Leg ulcers
– Cardiac
– Delays in growth and Development
– Pain
– Sickle cell crisis
– Cardiac
(2)
- Cardiac failure
- Stroke
– Pain
(2)
- Abdominal
- Bone (aseptic necrosis)
– Sickle cell crisis
(2)
- Prolonged (hours-days) severe pain which pay require
hospitalization for pain management - Causes: infection, higher altitude (hypoxia), dehydration,
trauma
Sickle Cell Anemia
* Oral Manifestations
(6)
–Mucosal pallor or jaundice
–Papillary atrophy
–Delayed tooth eruption
–Aseptic bone and pulpal
necrosis
–Osteomyelitis
–Neuropathy
Oral Manifestations
– Radiographically
(5)
- Increased widening and
decreased number of
trabeculations - Generalized osteoporosis
(thinning of the inferior border of
the mandible) - Trabeculations and lamina dura
appear more prominent - “Stepladder” trabeculae
- “Hair on end”
Dental Management
* Sickle Cell Anemia
– Routine care during — states
– Keep appointments short to —
– Emphasis on oral hygiene instructions to reduce risk of —
– Monitor oxygen saturation, when using nitrous oxide, provide oxygen at greater than —
– — for major surgical procedures
– Pain management:
non-crisis
reduce stress
infection
50% with high flow rates
Antibiotic prophylaxis
consult their primary care or hematologist (opioid contract)
Dental Management
* Sickle Cell Anemia
– Emphasis on oral hygiene instructions to reduce risk of infection
* If infection occurs, consider (2)
IM or IV antibiotics
Dental Management
* Sickle Cell Anemia
– Anesthetic:
(3)
- Avoid prilocaine
- Epinephrine 1:100,000-no stronger concentration
- May consider using LA without epinephrine
Aplastic Anemia
- Bone marrow failure resulting in
pancytopenia
Aplastic Anemia
* Causes
(6)
– Chemotherapy and radiation
– Autoimmune diseases
– Toxic chemicals (benzene)
– Viral
– Medications (methotrexate)
– Inherited (Fanconi anemia)
Aplastic Anemia
* Treatment
– Hematopoietic cell transplant
Aplastic Anemia
* Oral Manifestations
(3)
– Anemia
– Thrombocytopenia
– Neutropenia
Aplastic Anemia
* Oral Manifestations
– Anemia
(2)
- Atrophic glossitis with loss on
tongue papillae, redness or
cheilosis - Mucosal pallor
Aplastic Anemia
* Oral Manifestations
– Thrombocytopenia
(1)
- Petechia, spontaneous or
prolonged bleeding
Aplastic Anemia
* Oral Manifestations
– Neutropenia
(2)
- Infection
– Viral, fungal, bacterial - Ulceration
Aplastic Anemia & Bone Marrow Failure
Dental Management
(5)
- Thorough medical history
- Discussion with oncologist
- Labs
- Confirm patient is afebrile
- Local hemostatic measures for patients with thrombocytopenia
Aplastic Anemia & Bone Marrow Failure
Discussion with oncologist
(3)
- Current status and goals
- Defer routine care
- Dental office vs hospital
Aplastic Anemia & Bone Marrow Failure
Labs
* CBC
* Platelet:
* ANC-
may require platelet transfusion due to
thrombocytopenia
may require antibiotic prophylaxis for neutropenia
(>500)
Bleeding Disorders
(3)
- Platelet Disorders
- Inherited Coagulation Disorders
- Medication related bleeding Disorders
Thrombocytopenia
–— platelet levels (CBC)
* Normal:
* Severe:
Low
150,000-400,000
<50,000
Thrombocytopenia
–Causes: (4)
–Signs (2)
decreased
production, destruction,
medications, blood loss
Prolonged bleeding, petechia
Thrombocytopenia
–Oral Manifestations
(3)
- Petechia
- Spontaneous gingival bleeding
- Prolonged bleeding after
procedures
Thrombocytopenia
– Dental Management
(6)
- Thorough medical history
- May defer routine dental care
- CBC
- Discussion with patient’s MD
- Avoid block injections
- Local hemostatic measures
Thrombocytopenia
* Thorough medical history
(2)
– Cause of thrombocytopenia (acute cause? chronic cause?)
– Bleeding history, transfusion history
Thrombocytopenia
* CBC
(3)
– Recent (<24 hours)
– Platelet >50,000 for most dental procedures reduces risk
– Higher for invasive surgical procedures (ex. multiple extractions)
Thrombocytopenia
Discussion with patient’s MD
(2)
– Platelet transfusions, timing
– Dental office vs hospital (<50,000 more appropriate in hospital setting)
– Most common inherited clotting disorder (1%
US population)
Von Willebrand Disease