vcu death and complications conference. introduction complication post operative bleeding,...
TRANSCRIPT
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VCUDEATH AND COMPLICATIONS CONFERENCE
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Introduction
Complication Post operative bleeding, reoperation
Procedure Deceased donor kidney transplant
Primary Diagnosis Hypertension
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Clinical History HPI: 44 yo f with renal failure due to severe HTN
since childhood. She has had 3 previous kidney transplants.
PMH/PSH: 1989, 1999, 2007 kidney transplant 1999 AV and MV mechanical St. Jude valves, on
Coumadin 2007 Left transplant nephrectomy 2008 Right femoral AVG Hyperparathyroidism, OSA, infectious
endocarditis
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Hospital Course
INR 2.4 on admission INR 4.8 on POD #2
2mg Vitamin K INR 1.5 Heparin gtt with goal ptt 60-70
POD#4, Coumadin restarted POD#6: 2g drop in Hgb, hypotension,
tenderness over incision, left flank pain, INR 2.3, PTT 79 US: large collection of blood in left
retroperitoneum, obscuring and compressing transplant kidney; flow present in renal vein and artery
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Hospital Course
Return to OR for exploration ~250 mL of blood surrounding the
transplant kidney. Good flow in artery and vein, kidney slightly mottled, but viable. No active bleeding.
Biopsy: mild tubulitis, not clearly rejection POD#8, Hgb drop 8.9 7.1
CT scan: large collection of blood in retroperitoneum, no mass effect on kidney; hematocrit effect with layering
2 U PRBC, 2 U FFP
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transplant kidney, JP drain
superior to transplant kidney
just inferior to spleen
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Hospital Course
POD#11 2g hgb drop, hypotension, INR 1.5, PTT 30’s Repeat US with large collection of blood
around transplant kidney (400mL) Second return to OR 1L blood evacuated, no focal areas of
active bleeding POD#14 Current Hgb stable 9.1, 8.9,
hemodynamically stable, INR 1.4
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Analysis of Complication
• Was the complication potentially avoidable?• Yes, could have held anticoagulation or could
have avoided surgery
• Would avoiding the complication change the outcome for the patient?– Most likely, yes. No transfusions, no reoperation,
no compression of transplant kidney.
• What factors contributed the complication?– Anticoagulation, surgical dissection
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Discussion points
Mechanical valves Anticoagulation Management of post operative bleeding Perinephric hematoma, transplant
kidney
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Highest risk of stroke/embolism/valve thrombosis Mitral position Caged-ball valve Two or more prosthetic valves
Overall risk of valve thrombosis per year 0.7 - 1% on coumadin 2.2% on ASA 9-22% no anticoagulation (lower in some studies)
0.17-0.42% calculated absolute risk for 6-8 day post op warfarin interruption
Mechanical valve thrombosis
Douketis, James D. Perioperative anticoagulation management in patients who are receiving oral anticoagulant therapy: a practical guide for clinicians., Thrombosis research 2009
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Recommendations: Coumadin discontinued 5 days prior to surgery,
with reversal of INR to 1.5 or less FFP and low dose vitamin K for emergency
reversal Good intraoperative hemostasis Coumadin restarted 12-24 hours after surgery
Anticipated partial effect within 48 hours In high risk cases, heparin bridge recommended
several strategies with 24-72 hours, therapeutic vs. low dose depending on bleeding risk
Chest 2008;133;299S-339S
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28 patients with prosthetic heart valves hospitalized for major bleeding
Anticoagulation held, mean of 15 +/- 4 days 24 Mechanical valves
20 patients with St. Jude valves 12 mitral valves (11 St Jude) 12 aortic valves (5 St Jude) 4 both aortic and mitral (all St. Jude)
Thromboembolic events: zero at 6 month follow up One patient sudden death at 4 months, no post
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Page kidney Described by Irvine Page in 1939
Compression of animal kidneys with cellophane Seen with subcapsular/perinepheric
hematoma, uroma Renal hypoperfusion Microvascular ischemia Hypertension due to activation of renin angiotensin
system AKI, renal failure Evaluate by US, duplex US, CT scan Reversible by evacuation of hematoma,
decapsulation, nephrectomyAcute Renal Failure and Severe Hypertension from a Page Kidney Post-Transplant Biopsy Division of Nephrology, Feinberg School of Medicine, Northwestern University, Chicago TheScientificWorldJOURNAL August 3, 2010
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Learning points
Mechanical valve type and location important for risk of thrombosis and need for anticoagulation. Anticoagulation may be held for life
threatening bleed, but must be continually re-evaluated.
Perinepheric hematoma that is compressing or obstructing transplant kidney should be evacuated to prevent ischemia and graft failure.