management of the cardiac donor
TRANSCRIPT
Management of the Cardiac Donor
Monica Colvin-Adams, MDUniversity of Minnesota
Heart Failure/Cardiac Transplant
What are the goals? Successful organ recovery
Timeliness in order to save patient and minimize ischemic time
Respectful organ recovery
Optimize the function of each organ
Place as many organs as possible
Keep the doctors happy?
Aim of Organ Transplant Breakthrough Aim of Organ Transplant Breakthrough Collaborative (OTBC)Collaborative (OTBC)
““Save or enhance thousands of lives a year by maximizing the number of Save or enhance thousands of lives a year by maximizing the number of organs transplanted from each and every donor…achieve an average of 3.75 organs transplanted from each and every donor…achieve an average of 3.75 organs transplanted per donor.”organs transplanted per donor.”
---- Launched October 2005---- Launched October 2005
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Month/Year
Data source: OPTN database as of 8/2007
Collaborative starts here
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Organ Donation / Organ Transplantation Breakthrough Collaboratives in Synergy
Organs Transplanted Per Month With 12 Month Moving Average
CollaborativeStart Date
Close “the Gap”; Reach “Capacity,” Achieve 35,000
Capacity is reached when a DSA produces 75% conversion rates
3.75 organs transplanted per donor and 10% DCD (with 2.75 OTPD)
generates sufficient resources to transplant the resulting organ supply.
Goal of the Transplant Growth and Management Collaborative (TGMC)
“Save or enhance thousands of lives a year by maximizing the number of organs transplanted from each and every donor and building the necessary capacity within the Nation’s transplant programs to transplant 35,000 organs annually.”
Launched in October 2007
Learning ObjectivesDefine hemodynamics and the meaning of the
various measurements
Describe the hemodynamic concerns that arise with managing patients experiencing brain death
Discuss the “tensions” between organ procurement groups related to varying hemodynamic targets
Identify strategies to support the donor while yielding the greatest number of viable organs for transplant
Donor Assessment and Evaluation
Donor Assessment and EvaluationDonor History and Physical
Hemodynamic evaluation
Pressor and Inotropic Requirement
Cardiac Output
Cardiac Enzyme Markers
ECG
Echocardiogram
Coronary Angiogram
And then there are the issues surrounding the patient’s death. . .Cause of death – potential for organ trauma
Potential aspiration – risk of lung injury
Brain injury – associated with myocardial suppression
Diabetes insipidus – fluid losses build quickly
Intubated, ventilated patient - risk for pneumonia
Assessment and Evaluation Demographics
ABO
Cause of brain death
Time of declaration
Viral serologies
Substance use
Donor History Thoracic trauma
Hemostability
Pressors/inotropes
Down time (duration of cardiac arrest)
CPR
Hypotension
Donor Issues that may affect the outcome of the recipient Ischemia Time
Age
Size
Cause of Death
Substance Abuse
Ischemic Time Four hours is acceptable
Prolonged ischemic time associated with mortality and possibly graft vasculopathy after heart transplant, especially when complicated by older donor, increased resource utilization-conflicting data
Longer ischemic times may be acceptable in pediatric patients
Ischemic injury and contraction band necrosis
Preventive measures: post-conditioning, warm blood cardioplegia
Increased ischemic time allows for prospective CM, LVAD patients
Age Patient specific approach
Up to age 50-55
ISHLT registry increased mortality with older donors
Relationship between donor age and CAV (?): age related endothelial dysfunction
RV failure due to stiffer hearts
Donor age > 50 is a predictor of perioperative and long-term mortality
Del Rizzo et al. JHLT 1999
Analysis of Ischemic Time and Age: UNOS analysis
Russo et al. Cardiothoracic Transplantation 2007
Russo et al. Cardiothoracic Transplantation 2007
Analysis of Ischemic Time and Age: UNOS analysis
Size Matters Donor mismatch greater than 30% is a contraindication
Undersizing Pulmonary Hypertension
Oversizing Acute MI and urgent LVAD implantation Multiple cardiac surgeries with adhesions Cachexia
Case Donor Management Goals
•SBP >90•CVP 4-8•Final PO2 >350•PH 7.35-7.45•Glucose <200•Temp 96.8-99.6•UO 1-2cc kg/hr•NA <160•Total Fluid Balance @ DM and OR
The Deceased Organ Donor
BowelBowel
PancreasPancreas
LiverLiver
KidneysKidneys
LungsLungs
HeartHeart
DeceasedDeceasedDonorDonor
Transplant Surgeons:Not All On the Same Page
BowelBowel
PancreasPancreas
LiverLiver
KidneysKidneys
LungsLungs
HeartHeart
DeceasedDeceasedDonorDonor
“Don’t wreck it!”
“CVP 2-5”
“CVP 10-12”
“Keep it perfused”
“CVP 6-10”
“The more themerrier”
What do they really mean?
BowelBowel
PancreasPancreas
LiverLiver
KidneysKidneys
LungsLungs
HeartHeart
DeceasedDeceasedDonorDonor
“Like all organs, itneeds perfusion, butis less volume sensitive”
“Hypoperfusion cancause organ damage”
“Fluid excess can causealveolar infiltration and render lungs untransplantable”
“Hypoperfusion can stimulate ATN, injuringthe kidney and complicating recovery”
“The liver is less volume sensitive exceptin severe volume depletion or shock”
“Fluid excess can stress the heart”
What’s a Donor Coordinator to Do?
CardiacSurgeon
LiverSurgeon
Donor Coordinators
Brain Death
Physiologic Effects of Brain Death
Effects of Brain DeathHypotension 81%
Diabetes Insipidus 65%
DIC 28%
Arrhythmias 25%
Pulmonary Edema 18%
Metabolic Acidosis 11%
Martin Smith JHLT 2004
Aggressive management Early ID of donors
Admit to ICU
PA catheter
IVF resuscitation
VP to maintain MAP >70 if IVF fail
Hormonal treatment when dopamine or DBE > 10 mcg/kg/mn
Management of complications of brain death
Thyroid Hormone Decreased T3 (triiodothyronine) and conversion of T4 (thyroxine) to T3 after
brain death
Results in lactic acidosis, hypotension
Thyroid hormone is a positive inotrope
Shown to reverse lactic acidosis in experimental model
Hormone Replacement TherapyIncreases Organ Salvage
N= 123
Aggressive management + T4
Organ recovery 3.9 +/- 1.7 vs. 3.2 +/- 1.7, P=0.048
Retrospective study
Improves Outcomes UNOS analysis
Addition of T4
46% decrease in risk of death at 30 days
48% decrease in risk of graft dysfunction
Salim et al. Clinical Trans 2007
Rosedale et al. Transplantation 2003
Interventions
Importance of Serial Echos16 patients with WMA
13 with EF < 50%
12 patients improved EF between echos 1 and 2
Responsiveness to dobutamine is acceptable
Zaroff et al. JHLT 2003
Hemodynamics
Hemodynamics of Forward Flow
Cardiac OutputCardiac Output
Heart RateHeart Rate Stroke VolumeStroke Volume
PreloadPreload ContractilityContractility AfterloadAfterload
Hemodynamics of Forward Hemodynamics of Forward FlowFlow
Cardiac OutputCardiac Output(CO, CI)(CO, CI)
Heart RateHeart Rate(HR)(HR)
Stroke VolumeStroke Volume(SV, SVI)(SV, SVI)
PreloadPreload(CVP, RAP)(CVP, RAP)
(PCWP, PAOP, LAP)(PCWP, PAOP, LAP)
ContractilityContractility(RVSW, RVSWI)(RVSW, RVSWI)(LVSW, LVSWI)(LVSW, LVSWI)
AfterloadAfterload(PVR, PVRI)(PVR, PVRI)(SVR, SVRI)(SVR, SVRI)
Hemodynamic Monitoring
Hemodynamic Measured Values
TermTerm DescriptionDescription Normal ValuesNormal Values
CVPCVPRAPRAP
Central venous pressureCentral venous pressureRight atrial pressureRight atrial pressure
0-8 mmHg0-8 mmHg
RVPRVP Right ventricular pressureRight ventricular pressure 25/5 mmHg25/5 mmHg
PAPPAP Pulmonary artery pressurePulmonary artery pressure 25/12 mmHg25/12 mmHg
PCWPPCWPPAOPPAOP
Pulmonary capillary wedge pressurePulmonary capillary wedge pressurePulmonary artery occlusion pressurePulmonary artery occlusion pressure
10 mmHg10 mmHg
LAPLAP Left atrial pressureLeft atrial pressure 8 mmHg8 mmHg
HRHR Heart RateHeart Rate 60-100 60-100 beats/min (in beats/min (in
adults)adults)
Hemodynamic Goals
SBP >100 <150, DBP >50, <90
HR<100 >50
CVP 4-6
UO 1-2cc/kg/hr
Sustained hypotension increases inflammatory response from previous pro-inflammatory activation by sympathetic discharge associated with brain stem herniation (Arbor, 2005)
Volume Resuscitation
Resuscitation NaCl
CVP <4, Na+ <150, UO <1-2cc/kg/hr
D5W-Na+ >150
Colloids-avoid 5% albumin
Maintenance IVF
Na+ <150-D51/2 NS Na+ >150-D5W
Addition of K+ per serum K+ levels and frequency of K+ replacement
Rate-adjust to maintain CVP 4-6, UO 1-2cc/kg/hr
Hypotension Hypertension SBP <100, HR <100
Dopamine-max 20 mcg/kg/min
SBP <100, HR >100
Neosynephrine-max 200mcg/min Fluid Resuscitation
NaCl- bolus if CVP <4, Na+ <150 D5W-Na+ >150
SBP <100, EF <40%, CVP >6 Dobutamine
BP 150/90, HR >100
Labetalol 10-20mg IVP Q10min, max 300mg
Esmolol gtt 50mcg/kg/min-titrate max 200mcg/kg/min
BP 150/90, HR <100
Nipride gtt
0.1mcg/kg/min-titrate max 8mcg/kg/min
Arrhythmias Tachycardia in absence of hypotension
Diltiazem
Esmolol
Labetalol Arrythymia-atrial/ventricular
Diltiazem
Esmolol
Amiodarone
Hemodynamic Impact of Commonly Used Meds in Donor Management
Agent C.O./C.I.
H.R. Preload(CVP,
PCWP)
Contractility
(RVSWI, LVSWI)
Afterload(PVR, SVR)
BP
Diuretics(Lasix,
Bumex, etc.)
or or or
Dopamine(Inotrope)
(esp. in hypo-volemia
or (esp. in doses > 10 mcg/kg/mi
n)
Dobutamine(Dobutrex)
or or
Neosynephrine
Norepinephrine
(Levophed)
Vasopressin or
PulmonaryGOALS
SaO2 96%, PaO2 100 on 40% FiO2, PCO2 35, CVP 4-6
PaO2 >350 on 100% FiO2
CXR clear
UO 1-2cc/kg/hr
Interventions Lasix, Torsemide, Bumex
Aggressive pulmonary toilet (Link vest/CPT vest Q2hrs)
Early bronchoscopy
Aggressive Ventilator management
Ventilatory ManagementTV 10cc/kgPEEP 5cm H2OFiO2-adjust keeping SaO2 >96%, PaO2 >100. Keep FiO2 at lowest
setting I/E Ratio 1:2Rate-PCO2 x rate/40End expiratory pause 0.5 secSigh 1.5xTV Q2hrs (if able)PIP <30
Pulmonary Recruitment Maneuvers
Anesthesia bag w/manometer
Inflate and deliver breath to 40cm pressure hold x45 secs as tolerated-may repeat hourly PRN
PEEP 10 x2hrs
Pulmonary: medications
Albuterol/Atrovent neb Q4HRS, Q2HRS PRNSolumedrol 2G IV (30mg/kg <70kg) followed by 1 G (15mg/kg
<70kg) in 12 hrsDopamine 3mcg/kg/min (if not infusing, absence of HTN)Zosyn 3.375G IV Q6HRSNarcan 8mg IVP-use with quick herniation syndromes, not
effective in anoxic/occlusive CVA
Neurogenic Pulmonary Edema Common occurrence with brain death
Within minutes to hours of CNS insult
Blast Theory
Permeability Defect Theory
Neurogenic Pulmonary Edema: Blast Theory
Massive sympathetic dischargeSystemic arterial hypertension, peripheral
vasoconstriction, increased pulmonary arterial pressure and pulmonary mircovascular vasoconstriction
Pulmonary congestion with development of pulmonary edema
Endothelial damage
Permeability Defect TheoryNPE caused by neurologic increase in capillary permeability
Sympathetic stimulation affects vasculature permeability from altered endothelium allowing fluid to enter the interstitial space
Management of NPE Narcan
8 mg IVP x1
-Shown to prevent/reduced NPE in sheep (Peterson, et al. 1983)
-Suggests role of endorphins in alteration of pulmonary capillary permeability
-Controversial
-May increase spinal reflexes
Diabetes Insipidus Hypothalamic/hypophyseal loss of function limiting posterior pituitary ADH
production
UO > 250cc/hr x2 hours
Vasopressin gtt
DDAVP IVP
Crystalloid bolus
Anaerobic MetabolismLevothyroxine (T4) gtt
Any remaining hypothalamic/pituitary function too low to maintain adequate hormone levels causing anaerobic metabolism and mitochondrial dysfunction
Increased lactate and pyruvate levels with decreased cortisol levels are associated w/increased vasopressor/inotropic requirements and decreased myocardial contractility
Anaerobic metabolism cont. T4 (Levothryoxine)
T4 400mcg/500cc D5W
Pre-medicate in rapid succession in order as follows:
1 amp D50 IVP x1
2 G Solumedrol IVP x1 (If 1 G already given as ordered above give an additional 1 G IVP)
20U regular insulin IVP X1
20 mcg T4 IVP x1
Start T4 IV gtt at 10mcg/hr, max 50mcg/hr. Rate increases determined by Donation Coordinator.
CoagulopathyCommon occurrence with direct brain injury (GSW,
penetrating/blunt injury)
-rapid consumption of circulating clotting factors from release of thromboplastin, fibrinogen and tissue plasminogen (DIC)
Dilution
-large volume resuscitation with colloids and crystalloids
-not as common
Coagulopathy: Management
-FFP
-platelets
-cryoprecipitate
-vitamin K IV
Hemodynamic Strategy #1:Optimize Fluid StatusVolume resuscitation important before
initiating pressors
Target wedge pressure (5 - 10 mmHg)
Target CVP (4 - 7 mmHg)
Target SVR (800 - 1200 dynes/sec/cm-5)
Consider replacing urine output ml/ml with D5W 0.45%NaCl + 20 mEq KCl/liter
Target cardiac index > 2.5 L/min/m2
Hormonal resuscitation Methylprednisolone (SoluMedrol)Vasopressin Triiodothyronine or thyroxine
Vasoactive infusions Dopamine DobutamineLevophedNeosynephrine
Hemodynamic Strategy #2:Hemodynamic Strategy #2:Optimize Cardiac OutputOptimize Cardiac Output
Pressure = Flow x ResistancePressure = Flow x Resistance Blood Pressure = C.O. x SVRBlood Pressure = C.O. x SVR Vasoactive infusions effecting blood Vasoactive infusions effecting blood
pressure pressure Dopamine Dopamine DobutamineDobutamine LevophedLevophed NeosynephrineNeosynephrine
Hemodynamic Strategy #3:Hemodynamic Strategy #3:Optimize Blood PressureOptimize Blood Pressure
Summary Aggressive management results in improved organ availability
Aggressive management improves outcomes
Reassess!
Involve the transplant center
Case 22 yo male potential donor
Motorcycle accident
OPO called prior to brain death
History of occasional cocaine use, ETOH
No medical history
No significant family history
Case: Exam BP 87/60 HR 115 O2 sat 100%
No JVD, Lungs clear, trace edema
What initial steps should you take?
Patient receives aggressive hydration while undergoing assessment
8 hours later, BP still 85/60 HR 118
What next?
Echo EF probably normal, but concern for basilar hypokinesis, mild RV dilatation;
pictures are limited
RA 12 PA 34/15 PCWP 15 CI 4
What are your options?
Other potential issues: patient is CMV +, potential recipient is CMV-
What if patient were HCV +
The other side 55yo patient with ischemic cardiomyopathy
History of MI
PA 70/45 prior to VAD, now 45/22 with PCWP 17
BMI 33 kg/m2
What are the considerations for this patient?