Oral Medicine V - Brennan's Bespoken Bane Flashcards
Dyskinesias affect the jaw
Levodopa
True
What is the ideal pre-Tx drug regimen for Parkinson’s pts?
Take meds 60-90 minutes prior to appt
*peak response period
**also, brief visits
Palpitations:
A-fib
atrial fibrillation
An estimated 2.6 million Americans have A-fib, number is increasing, and is responsible for ______% of all Strokes
15-20%
4 comorbidities to A-fib
Coronary artery disease
CHF
Diabetes
Thyrotoxicosis
3 Therapies for A-fib
Meds (Antithrombotics, combo, alternative)
Cardioversion
Ablation
New Comparative Study, Tx of CVA can be safely administered w/in what time period?
As long as what?
A few weeks of CVA
Kept under optimal medical surveillance
Most common Inherited Clotting Disorder:
Hemophilia A
(1 in 5,000 male births)
Hemophilia B
(1 in 30,000 male births)
Hemophilia A is a Factor ___ deficiency (80%)
Hemophilia B is a Factor _____ deficiency (13%)
6% is a factor ____ deficiency
Factor VIII
Factor IX
Factor XI
Vitamin K rich foods are
Green
If you lack one coagulating factor it is…
If you lack multiple coagulating factors it is….
Inherited disorder
Acquired disorder
4 Vitamin K factors made in the LIVER:
II
VII
IX
X
Factor XII, XI, IX
Factor VII
Intrinsic system/Tissue Factor pathway
Extrinsic system/Contact pathway
3 lab tests for Coagulation Disorders
aPTT - Activated Partial Thromboplastin Time
PT - Prothrombin Time
Platelet Count
aPTT tests the ______ system. What 4 factors?
PT tests the _______ system. What 5 factors?
Platelet Count deals w/ primary _____
Intrinsic VIII, IX, XI, XII
Extrinsic VII, V, X, prothrombin II, fibrinogen I
Hemostasis
Some pts might not be forthcoming about bleeding disorders - what is an important question to ask?
Do you bleed or bruise easily?
5 Uses for Warfarin
*what 2 have higher anticoagulation and higher risk of morbidity
Prosthetic Heart valves
Hx deep venous thrombosis
MI
Stroke
Atrial Fibrillation
What INR and PT levels would you not worry about (discontinuation not necessary for minor OS)
INR < 3.5
PT < 20 seconds
Primary concern for pts on Warfarin:
Physician Consult?
Recourse for excessive bleeding:
Post Op:
Hemostasis
Order/review lab values - perioperative change likely
GelFoam/thrombin, bone wax, Amicar/Tranexamic acid rinses
Acetominophen/codeine
PT < 20 seconds, INR < 3.5
These measurements should be takend w/in _____
You can make changes to anticoagulation therapy
24 hrs
False
3 Issues w/ Warfarin:
Narrow therapeutic window
Frequent monitoring
Food/Drug interactions
What consumables increase the effects of Warfarin?
What decreases?
Wine, cranberries
Green, Vitamin K rich foods
Pain med interactions w/ Warfarin:
Abx interactions:
ASA, NSAIDS, Acetaminophen
Tetracycline, ampicillin, amoxicillin/clavulanic acid (augmentin)
What Abx should you take w/ pt on Warfarin? (2)
Pen V or Clindamycin
T/F
Lit supports altering anticoagulant regimen prior to dental procedures and surgery
False
*go by 3.5 rule
Clinical judgement, experience, training, and accessibility to appropriate bleeding management strategies are all important components in any treatment decision
Frame and put on wall
3 Antiplatelet agents:
ASA (and NSAIDS)
Ticlid
Plavix
Antiplatelets are used primarily for prophylaxis of:
Secondary prevention of adverse ________
in pts with Hx of _______, _______, and ______
Coronary Thrombosis
Thromboembolic events
Coronary thrombosis, Stroke, Unstable Angina
Do NOT mix up coagulation factors w/ Anti-Platelets - What does INR measure?
Coagulation (warfarin)
NOT platelets (ASA, etc)
Best test for ASA platelet effect is PFA 100 or Ivy bleeding time
Not a problem unless Bleeding time is greater than ______
True
20 minutes
NSAIDS will increase bleeding time how?
Generally you must wait 3 half lives (w/ wide variance between drugs)
Antiplatelet
True
6 ways to increase clinical risk of bleeding through antiplatelet activity:
ASA
NSAIDS
EtOH
Age
Liver disease
existing coagulopathies
Clinical recommendation for pts on Antiplatelet therapies:
Little/No indication to interrupt antiplatelet drugs for dental procedures
It is not necessary to interrupt low dose aspirin therapy for simple dental extractions
True
*really any ASA dose
Drug Eluting Stents (DES) is often clopidogrel, plavix, etc and when combined with ASA…
Decreases cardiac events after stenting
DES, premature discontinuation of antiplatelet therapy greatly increases the risk of what 3 things?
Stent Thrombosis
MI
Death
DES usually has ASA/Plavix dual Tx for how long after Stent placed?
Postpone Elective surgery for how long?
If surgery cannot be deferred, what do?
12 months
12 months
continue ASA perioperatively
3 reasons for Warfarin replacement drugs:
Wide therapeutic index
Few Drug/Food interactions
Predictable anticoagulant response at fixed doses
3 new oral Anticoagulants (Warfarin replacements)
Dabigatran
Rivaroxaban
Apixaban
New oral Anticoagulants (Xarelto, etc) have what major flaw
No reversal agent
What is the reversal agent for Warfarin?
New drugs?
Vitamin K
nothing
If pt taking new Anticoagulants, what 3 lab tests do you need prior to surgery?
aPTT
TT
anti-factor Xa
Warfarin acts on what 4 clotting factors:
Unfractioned Heparin on what 2:
Rivaroxaban (and Apixaban):
Dabigatran:
VIIa, IXa, Xa, Thrombin
Xa, Thrombin
Xa
Thrombin
2 new drugs act on Factor X:
1 new acts on Factor II (Thrombin):
Rivaroxaban, Apixaban
Dabigatran
T/F
It does not appear Dabigatran discontinuation is necessary (if renal function, etc ok)
True
Type 1 diabetics have a deficiency of insulin secondary to destruction of what cells?
Type II is either faulty receptors to insulin or antibodies to those insulin receptors or insulin itself
In either case, what is the result?
Beta cells
True
Hyperglycemic State