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Transcript of 1 Coagulation : Clinical issues Dr. M.B. Agarwal, MD, MNAMS Head, Dept of Haematology, Bombay...
![Page 1: 1 Coagulation : Clinical issues Dr. M.B. Agarwal, MD, MNAMS Head, Dept of Haematology, Bombay Hospital Inst of Med Sc, Mumbai 4 th Basic Haemato-Pathology.](https://reader036.fdocuments.us/reader036/viewer/2022070415/56649ca25503460f94961723/html5/thumbnails/1.jpg)
1
Coagulation : Clinical issues
Dr. M.B. Agarwal, MD, MNAMS
Head, Dept of Haematology, Bombay Hospital Inst of Med Sc,
Mumbai
4th Basic Haemato-Pathology Course, TMH, Mumbai
Friday, 30th May 2014
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1. Genetic bleeding disorders
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•Prakash, 15-year old boy from Pune
with post-traumatic nasal bleeding
•No family h/o bleeding disorder
Prakash Kumar : A case study
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Prakash Kumar: Lab investigations
Tests Results Control
Hb 13.3 g/dl
Haematocrit 41.4 %
WBC 7900/cmm
Platelets 368,000/cmm
PT 11 s 11 s
PTT 46 s 28 s
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Differential diagnosis
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Factor deficiency
or
Inhibitors
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Test Result Control
PTT 46 s 28 s
PTT mix (4:1) 30 s
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Factor deficiency
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Normal coagulation cascade
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Intrinsic pathway defect
•Factor VIII deficiency including Von Willebrand Disease
•Factor IX deficiency
•Factor XI deficiency (rare)
•Factor XII deficiency (non-bleeder)
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Test Result Normal
Factor VIII : C 9 % 50 - 150 %
Factor IX 77 % 50 - 150 %
What does this mean ?
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Classical haemophilia A
or
Von Willebrand Disease
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VWD has equal prevalence in both sexes (Autosomal)
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Prakash Kumar : A case study
•Bleeding from nose
•Raised PTT
•Good correction on mixing studies
•Low factor VIII : C
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Prakash Kumar : Further work up
Test Result Normal
VIII : C 9% 50-150%
VWF : Ag 12 % 60-150 %
VWF : RCoF 10 % 50-150 %
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Prakash Kumar : Final diagnosis
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Von Willebrand Disease
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VWD : Primary classification
Subtypes VWF
Type 1 Partial deficiency (AD)
Type 2 Qualitative defect (AD)
Type 3 Total deficiency (AR)
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VWD type 2 : sub classification
Subtypes Characteristics DD
2A*High mol wt VWF
multimers absent
VWD : Type 1 &
Type 2M
2B*Low and High mol wt VWF ↓
↑ RIPAThrombocytopenia
2M*High mol wt VWF multimers normal
↓ VWF : CBVWD : Type 2A
2N** Markedly ↓ affinity for factor VIII Haemophilia
*VWF : Ag > VWF : RcoF, **AR
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Prakash Kumar : Final diagnosis
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Von Willebrand Disease – Type 1
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2. Acquired bleeding disorders
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Case study
•Mr. Rajanikant, 69 y from Mumbai
•SC hematomas & easy bruising : 2 mths
•Platelet count : 3,32,000/cmm
•PT : 43/12 secs, INR 3.7
•PTT : 56/30 secs
•Both PT & PTT are raised
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How do you approach a case with
both raised PT & PTT ?
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First,
we must exclude
difficult collection
(partially clotted blood)
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We must also exclude
effect of high haematocrit
(polycythemia)
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Normal coagulation cascade
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We should now consider a single
genetic factor deficiency from
common pathway or multiple
factor deficiencies from both
pathways
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• Common pathway defect
• Vitamin K deficiency
• Chronic liver disease
• Consumptive coagulopathy
• Anticoagulant therapy
Mr. Rajanikant
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•Genetic disorder : Unlikely
•Vitamin K therapy : No effect
•Liver function : normal
•DIC profile : normal
Mr. Rajanikant
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Rajanikant : Mixing studies
Test PT PTT
Raj 43 56
Control 12 30
4 : 1 mix 15 34
Conclusion : Factor deficiency
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Common pathway defect
•Factor I deficiency
•Factor II deficiency
•Factor V deficiency
•Factor X deficiency
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Factor I : 290 mg/dl
Factor II : 87%
Factor V : 78%
Factor X : 1.2%
Rajanikant : Factor assays
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Amyloidosis
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Rajanikant : Amyloidosis
• Macroglossia
• S. Protein electrophoresis : Faint M band present
• S. Immunofixation : Lambda monoclonal
gammopathy
• Bone marrow : Plasma cells : 2-3%
• Bone marrow biopsy : Amyloidosis
• Abdominal fat pad biopsy : Amyloidosis
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3. Pictorial Quiz
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What is
this ?
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What is this ?
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Wha
t is
it?
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Blue toe syndrome
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CoaguloChek
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Bleeding at 6 pm
on
left forearm
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Factitious
purpura
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59Thank YouThank You