update on novel shock treatments and approach to utilization...corticus: no difference in responders...
TRANSCRIPT
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Update on Novel Shock Treatments and Approach to Utilization
Kayla A. Nichols, BS, PharmD, BCCCPClinical Pharmacist II, Critical Care
Emory University Hospital
Adjunct Clinical InstructorMercer University College of Pharmacy
Atlanta, Georgia
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DisclosuresI have nothing to disclose concerning possible financial or personal relationships with commercial entities (or their competitors) that may be referenced in this presentation.
I will be discussing the off-label use of medications.
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Objectives• Review standard therapies frequently utilized for shock
• Discuss novel and evolving therapies for shock• Corticosteroid review• Metabolic resuscitation• Angiotensin II• Methylene blue• Hydroxocobalamin
• Apply novel therapies to current regimens often used in practice
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Before we tackle the new stuff
Let’s review the old stuff
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Definition of Shock• A state of cellular and tissue hypoxia due to one or more
of the following:• inadequate oxygen delivery • overconsumption of oxygen • inadequate oxygen utilization
J Environ Sci Health A Tox Hazard Subst Environ Eng. 2012;47(7):920-39.Image: https://wesavelives.org/alyson-geller-dear-allstate/
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Types of Shock: Cardiogenic
J Environ Sci Health A Tox Hazard Subst Environ Eng. 2012;47(7):920-39.Image: http://trendintech.com/2018/05/30/researchers-develop-technique-that-can-remotely-operate-lab-grown-heart-cells/human-heart-anatomical-rendering-on-dark-background/
• Reduction in pump function• Ex: myocardial infarction
• Treatment:• Fluid optimization• Inotropes• Vasopressors
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Types of Shock: Hypovolemic
J Environ Sci Health A Tox Hazard Subst Environ Eng. 2012;47(7):920-39.Image: https://www.kisspng.com/png-red-cell-a-red-blood-cell-311605/
• Reduction of intravascular volume• Ex: trauma, high volume
losses
• Treatment:• Fluid resuscitation• Blood• Vasopressors
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Types of Shock: Obstructive
J Environ Sci Health A Tox Hazard Subst Environ Eng. 2012;47(7):920-39.Image: https://www.roadtrafficsigns.com/road-closed-signs
• Impaired venous return• Decreased cardiac output
• Ex: pulmonary embolism
• Treatment:• Vasopressors• Removal of obstruction
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Types of Shock: Distributive
J Environ Sci Health A Tox Hazard Subst Environ Eng. 2012;47(7):920-39.Image: https://pixabay.com/en/pseudomonas-aeruginosa-bacteria-2034320/
• Most common form of shock
• Loss of microcirculatory autoregulation and/or increased metabolic demand• Ex: sepsis, vasoplegia
• Treatment:• Fluid resuscitation • Vasopressors
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Distributive Shock Wheelhouse
Fluids Vasopressors +/- Steroids*
*Individual practice varies
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Improving Blood Pressure: a Review
Vasopressors Inotropes
Epinephrine
NorepinephrinePhenylephrine
Dopamine
Dobutamine
Milrinone
Vasopressin
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Corticosteroids: a review
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Click to edit Master text stylesComput Biol Med. 2015 Dec 1;67:1-12.Crit Care Med. 2001 Jul;29(7 Suppl):S117-20.
Hypothalamus-Pituitary-Adrenal Cortex Axis
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Click to edit Master text stylesCrit Care Med. 2001 Jul;29(7 Suppl):S117-20.Eur J Pharmacol 1972;20:1–9
1) Anti-inflammatory: – Hypothalamic-Pituitary-Adrenal axis (HPA)– Reduced cytokine production
2) Cardiovascular – Cytokines cause peripheral decreased response to
catecholamine receptor– Cortisol improves vasoconstrictor response to
epinephrine in animal models
Corticosteroids: two mechanisms
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The Corticosteroid Controversy
Crit Care Resusc. 2017 Mar;19(1):3-4.Crit Care Med. 2014 Nov;42(11):2442-3.
1970s
“High dose steroids suppress the sepsis induced inflammatory response”
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The Corticosteroid Controversy
Crit Care Resusc. 2017 Mar;19(1):3-4.Crit Care Med. 2014 Nov;42(11):2442-3.
1970s
1980s
“High dose steroids increase the risk of infection and superinfection, thereby increasing morbidity”
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The Corticosteroid Controversy
Crit Care Resusc. 2017 Mar;19(1):3-4.Crit Care Med. 2014 Nov;42(11):2442-3.
1970s
1980s
1990s
Annane et al: decrease mortality, reduced shock reversal timeCORTICUS: no difference in responders vs non, decrease shock reversal
time
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The Corticosteroid Controversy
1970s
1980s
1990s
2018
New England Journal of Medicine:ADRENAL 2018
APROCCHSS 2018
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• Annane showed a mortality benefit for non-responders that received hydrocortisone and fludrocortisone
• Subsequent studies have failed to duplicate the benefits seen in this trial and even suggested infection-related harm
• Hydrocortisone may lead to a more rapid reversal of shock
• ACTH-stimulation test no longer used in practice
Corticosteroids: Prior to 2018
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Corticosteroids: 2018 update
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Click to edit Master text stylesN Engl J Med. 2018 Mar 1;378(9):797-808
ADRENAL 2018Objective
• To determine if administration of corticosteroids reduce 90-day mortality in patients with septic shock requiring ventilator and vasopressor support
Study Design• Multicenter, double-blind, parallel-group, randomized controlled trial• Continuous infusion of hydrocortisone 200mg IV daily for 7 days or ICU
death/discharge vs placebo
Population• N = 3,658• Mechanically ventilated• Strong clinical suspicion of infection with ≥2 SIRS criteria• Continuous vasopressors/inotropes for SBP >90 mmHg or MAP > 60
mmHg for ≥4 hours
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Click to edit Master text stylesN Engl J Med. 2018 Mar 1;378(9):797-808
ADRENAL 2018Outcome Steroids (n = 1,832) Placebo (n = 1,826) Significance
Mortality at 90 days (%) 27.9 28.8 HR 0.95; 0.82-1.10
Duration of ventilation (days) 6 7 HR 1.13; 1.05-1.22
Median time to shock reversal (days) 3 4 HR 1.32; 1.23-1.41
Median time to ICU discharge (days) 10 12 HR 1.14; 1.06-1.23
28 day mortality (%) 22.3 24.3 OR 0.89; 0.76-1.03
Blood transfusions (%) 37.0 41.7 OR 0.82; 0.72-0.94
Critiques:• Prior trials used bolus doses of steroids• Adverse events were recorded on clinical judgement
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Click to edit Master text stylesN Engl J Med. 2018 Mar1;378(9):809-818.
APROCCHSS 2018Objective
• To determine if administration of hydrocortisone plus fludrocortisone therapy would improve the clinical outcomes of patients with septic shock
Study Design
• Multicenter, double-blind, 2 by 2 factorial, randomized trial• Hydrocortisone 50mg IV q6h and fludrocortisone 50 mcg daily for 7 days vs Placebo
Population
• N = 1,241• Admitted to the ICU <7 days with indisputable or probable septic shock <24 hours
• Clinically or microbiologically documented infection• SOFA 3-4 for ≥2 organ systems for ≥6 consecutive hours• Receipt of vasopressor therapy (≥0.25 mcg/kg/min or ≥1mg/hr) for ≥6 hours
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Click to edit Master text stylesN Engl J Med. 2018 Mar1;378(9):809-818.
APROCCHSS 2018
Outcome Steroids (n=614) Placebo (n=627)Mortality at 90 days (%) 43 49 RR 0.88; 0.78-0.99Mortality at 28 days (%) 34 39 RR 0.87; 0.75-1.01Mortality at ICU discharge (%) 35 41 RR 0.86; 0.75-0.99Mortality at hospital discharge (%) 39 45 RR 0.86; 0.76-0.98Mortality at 180 days (%) 47 53 RR 0.89; 0.79-0.99Vasopressor-free days at 28 days (days) 17 15 P < 0.001Organ-failure-free days at 28 days (days) 14 12 P = 0.003
Critiques:• Trial conducted using the Surviving Sepsis 2008 Guidelines, which has since
been updated• Patients were generally more ill limiting the generalizability
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• Corticosteroids accelerate time to shock resolution and weaning of vasopressors
• To be determined:– Improvement in mortality– Optimal patient population– Optimal timing to initiate– Chronic steroid use and corticosteroids in shock– Adverse effects and risk
Steroids: Role in Therapy
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What if the steroids aren’t enough?
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Metabolic resuscitation
http://www.hrphysician.com/paul-e-marik-md/
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Click to edit Master text stylesChest. 2017 Jun;151(6):1229-1238rationale.Pharmacol Ther. 2018 Apr 21Crit Care Med. 2016Feb;44(2):360-7Image: http://graphics.latimes.com/food-water-footprint/
What is metabolic resuscitation?
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Click to edit Master text stylesChest. 2017 Jun;151(6):1229-1238rationale.Pharmacol Ther. 2018 Apr 21Crit Care Med. 2016Feb;44(2):360-7Image: http://graphics.latimes.com/food-water-footprint/
What is metabolic resuscitation?Hydrocortisone 50mg IV q6h
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Click to edit Master text stylesChest. 2017 Jun;151(6):1229-1238rationale.Pharmacol Ther. 2018 Apr 21Crit Care Med. 2016Feb;44(2):360-7Image: http://graphics.latimes.com/food-water-footprint/
What is metabolic resuscitation?Hydrocortisone 50mg IV q6h
Ascorbic acid 1500mg IV q6h
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Click to edit Master text stylesChest. 2017 Jun;151(6):1229-1238rationale.Pharmacol Ther. 2018 Apr 21Crit Care Med. 2016Feb;44(2):360-7Image: http://graphics.latimes.com/food-water-footprint/
What is metabolic resuscitation?Hydrocortisone 50mg IV q6h
Ascorbic acid 1500mg IV q6h
Thiamine 200mg IV q12h
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Click to edit Master text stylesChest. 2017 Jun;151(6):1229-1238
Marik 2017
Objective• To determine if vitamin C, thiamine, and hydrocortisone provides a
mortality benefit in patients with severe sepsis or septic shock
Study Design• Retrospective before-after study• Ascorbic acid + thiamine + hydrocortisone vs. hydrocortisone alone
or no therapy
Population• N = 194• Primary diagnosis of severe sepsis or septic shock• Procalcitonin ≥2
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39.141.6
8.5
40.4
0
5
10
15
20
25
30
35
40
45
HC + B1 + Vit C Control
Primary Outcome: In-Hospital Mortality (%)
Predicted Actual
Chest. 2017 Jun;151(6):1229-1238
Marik 2017
P < 0.001
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Click to edit Master text stylesChest. 2017 Jun;151(6):1229-1238
Next steps
• The VItamin C, Thiamine And Steroids in Sepsis (VICTAS) Study – Sponsored by Emory University
• Evaluation of Hydrocortisone, Vitamin C, and Thiamine for the Treatment of Septic Shock (HYVITS)– Sponsored by Hamad Medical Corporation
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Metabolic Resuscitation: a Summary• Jury is still out on combination
– Marik study demonstrated mortality benefit but does not demonstrate causation
• Several studies underway to evaluate regimen in more elegant way
• Ethics of administering regimen while trials are ongoing?
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Enough about steroids and vitamins,
Let’s talk about the drips!
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Angiotensin II
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Click to edit Master text stylesJ Manag Care Pharm. 2007 Oct;13(8 Suppl B):9-20. Review
Renin Aldosterone-Angiotensin System (RAAS)
• Decrease in renal blood flow causes kidneys to convert prorenin to renin
• Renin converts angiotensinogen to angiotensin I– ACE converts angiotensin I to angiotensin II
• Angiotensin II– Potent vasoconstrictor – Aldosterone stimulator
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Click to edit Master text stylesCrit Care Resusc.2017 Mar;19(1):43-49
Angiotensin-II: ATHOS-3Objective
• To determine if angiotensin II improved mean arterial pressure (MAP) compared to placebo
Study Design• Prospective, multicenter, double blind, randomized controlled trial• Angiotensin II and placebo infusions
Population• N = 321• Patients with catecholamine-resistant hypotension (>0.2 mcg/kg/min of
NE or equivalent)• Received at least 25 mL/kg of crystalloid or colloid over the previous 24
hours• Features of distributive shock
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Click to edit Master text stylesCrit Care Resusc.2017 Mar;19(1):43-49Giapreza [package insert] La Jolla Pharmaceutical Company, CA; 92121
ATHOS-3Outcome Ang II (n=163) Placebo (n=158) Significance
MAP response (%) 69.9 23.4 OR 7.95; 4.76-13.3
Change in NE-equivalent dose at 3h -0.03 0.03 p<0.001
All cause mortality at 7 days (%) 29 35 OR 0.78; 0.53-1.16
All cause mortality at 28 days (%) 46 54 OR 0.78; 0.57-1.07
Critiques:• Small study size that limited power to detect difference• Titration period may allow for inadvertent un-blinding due to observable MAP
changes
Adverse Event Ang II (n=163) Placebo (n=158)ADRs leading to discontinuation (%) 14.1 21.5
Serious ADRs (%) 60.7 67.1
Deep-vein thrombosis (%) 12.9 5.1
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Angiotensin II: Role in Therapy• Opinion on place in therapy is varied between
practitioners– Role in acute kidney injury and liver failure?– How much vasopressor is enough (but not too much)?
• High cost medication with 24 hour expiration
• Restricted at Emory University Hospital to:– High output shock with adequate volume resuscitation– Norepinephrine 0.2 mcg/kg/min + vasopressin or
equivalent
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Angiotensin II: TitrationNE equivalent (mcg/kg/min) Vasopressin (units/min) Angiotensin II
(ng/kg/min)
0.10 – 0.15 0.03 0
0.16 – 0.20 0.03 5
0.20 – 0.25 0.03 10
0.25 – 0.30 0.03 15
0.30 – 0.35 0.03 20
0.35 – 0.40 0.03 25
0.40 – 0.45 0.03 30
0.45 – 0.50 0.03 35
> 0.50 0.03 40
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Methylene Blue
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Inhibit NO synthase
[NO] decreases
Inhibits guanylate cyclase
[cGMP] decreases
Methylene Blue: Two Mechanisms
AM J Med Sci 2005;349(1):80-88Ann Thorac Surg 2014;97:1785-6Am J Med Sci 2015;349(1):80–88.
• cGMP causes myosin de-phosphorylation which prevents actin and myosin interaction
• Decreasing cGMP allows this interaction to occur, raising vascular tone
NO: nitric oxidecGMP: cyclic guanosine monophosphate[X]: concentration of X
1 2
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Levin 2004
Objective
• Evaluate effect of intravenous methylene blue on mortality in post-operative vasoplegic patients
Study design
• Multicenter study (probably not blinded)• 1.5 mg/kg intravenous methylene blue over 1 hour or placebo
Population
• N = 56 (8.8% of 638 total patients evaluated)• Elective cardiac surgery patients with presence of “vasoplegic
syndrome”Ann Thorac Surg. 2004 Feb;77(2):496-9
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Levin 2004
• Critiques– Small sample size– No power calculation– Vasoplegia resolution not defined– Incidence of vasoplegia half of anticipated– Length of follow up not defined
Ann Thorac Surg. 2004 Feb;77(2):496-9
Outcome Methylene Blue (n = 28)
Placebo (n = 28) Significance
Mortality, all-cause (%) 0 (0) 6 (21.4) p = 0.01
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Methylene Blue: Role in Therapy• Dose: 1.5 – 2 mg/kg bolus over 1 hour
• Continuous drip if bolus is successful
• When to use: • Vasoplegia after cardiac bypass• Other reversible causes of distributive shock
• Concerns:• Monoamine oxidase inhibitor (MAOI) properties• Glucose-6-phosphate dehydrogenase (G6PD) metabolism • Blue-green discoloration
AM J Med Sci 2005;349(1):80-88Ann Thorac Surg 2014;97:1785-6Pharmacotherapy. 2010 Mar;30(3):323.Image: www.medline.com/product/Methylene-Blue-Injection/Z05-PF92283
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Methylene Blue: Role in Therapy• Dose: 1.5 – 2 mg/kg bolus over 1 hour
• Continuous drip if bolus is successful
• When to use: • Vasoplegia after cardiac bypass• Other reversible causes of distributive shock
• Concerns:• Monoamine oxidase inhibitor (MAOI) properties• Glucose-6-phosphate dehydrogenase (G6PD) metabolism • Blue-green discoloration
AM J Med Sci 2005;349(1):80-88Ann Thorac Surg 2014;97:1785-6Pharmacotherapy. 2010 Mar;30(3):323.Image: www.medline.com/product/Methylene-Blue-Injection/Z05-PF92283
*Not removed by CVVHDF?
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Hydroxocobalamin
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Shapeton 2018• Literature review for using hydroxocobalamin for
treatment of vasoplegia
• 14 articles reviewed, 1 excluded– 7 case reports
• Only 2 did not use concomitant methylene blue– 4 case series
• Largest (n = 33) also used methylene blue in half of patients
J Cardiothorac Vasc Anesth. 2018 Aug 11
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Hydroxocobalamin: Case Reports
Ann Thorac Surg 2014;97:1785-6Can J Anaesth. 2017 Jun;64(6):673-674.J Cardiothorac Vasc Anesth. 2018 Aug 11
Case Report Age (Sex) Procedure Vasoplegia
resolved? Comments
Roderique 2014 71 (M) Valve repair Yes Citalopram as home med
Warmer et al 2017 82 (M)Abdominalaortic stent
graftYes Experienced
chromaturia
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Hydroxocobalamin• Mechanism of action unknown
– Likely related to NO sequestering in vascular endothelium
• Available only in Cyanokits – 5g IV in NS 200mL over 15 minutes
• Concerns– Red color– Erythema– Rash– Infusion site reactions– Blood leak false alarm in dialysis patients– Hypokalemia in megaloblastic anemia
Ann Thorac Surg 2014;97:1785-6Can J Anaesth. 2017 Jun;64(6):673-674.J Cardiothorac Vasc Anesth. 2018 Aug 11
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Click to edit Master text stylesAnn Thorac Surg 2014;97:1785-6Can J Anaesth. 2017 Jun;64(6):673-674.J Cardiothorac Vasc Anesth. 2018 Aug 11
Hydroxocobalamin• Mechanism of action unknown
– Likely related to NO sequestering in vascular endothelium
• Available only in Cyanokits – 5g IV in NS 200mL over 15 minutes
• Concerns– Red color– Erythemia– Rash– Infusion site reactions– Blood leak false alarm in dialysis patients– Hypokalemia in megaloblastic anemia
Before hydroxocobalamin After hydroxocobalamin
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Hydroxocobalamin: Role in Therapy
J Cardiothorac Vasc Anesth. 2018 Aug 11 epub.
Diagnosis of vasoplegia refractory to
vasopressors
Are there contraindications for methylene blue?
-Risk of Serotonin syndrome?-G6PD deficiency?
Yes
Consider hydroxocobalamin
No
Consider methylene blue
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Next Steps• Hemodynamic Effects of Methylene Blue vs.
Hydroxocobolamin In Patients At Risk of Vasoplegia During Cardiac Surgery– Sponsored by Dartmouth-Hitchcock Medical Center
• Study will be using either agent prophylactically in patients at risk of vasoplegia
J Cardiothoracic Vasc Anesth. 2017 Jun;31(3):1012-14CClin Kidney J. 2017 Jun;10(3):357-362
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Lets put it all together
With some examples
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LM: 58 year old male• Presented to the dentist with a presumed abscess and a
mass that has been increasing in pain for the past month
• Later diagnosed with head and neck cancer and had esophagectomy.
• POD 2 patient develops hypotension and is started on broad spectrum antibiotics and vasopressors.
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LM: 58 year old male• Vitals
– BP: 70/40 mmHg – HR: 130 bpm– RR: 29 breaths per minute– Temp: 38.5°C– Lactate: 5 mMol/L
130
4.1
115
25
58
2.8995
0.8 677.5
23.4What are our options?
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LM: 58 year old maleRaise your hand for the option you would consider in this patient
1. Hydrocortisone2. Metabolic resuscitation3. Angiotensin II4. Methylene blue5. Hydroxocobalamin
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LM: 58 year old maleRaise your hand for the option you would consider in this patient
1. Hydrocortisone2. Metabolic resuscitation3. Angiotensin II4. Methylene blue5. Hydroxocobalamin
Could argue that all of these are correct in appropriate order
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LM: 58 year old male
NE at 0.1 mcg/kg/min
NE at 0.2 mcg/kg/min
Vasopressors continue to
escalate
Hydrocortisone +metabolic
resuscitation
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LM: 58 year old male
NE at 0.1 mcg/kg/min
NE at 0.2 mcg/kg/min
Vasopressors continue to
escalate
Hydrocortisone +metabolic
resuscitation
Angiotensin II
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LM: 58 year old male
NE at 0.1 mcg/kg/min
NE at 0.2 mcg/kg/min
Vasopressors continue to
escalate
Hydrocortisone +metabolic
resuscitation
Angiotensin II
Methylene blue or hydroxocobalamin
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Next patient
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PM: 85 year old female• Significant PMH including dementia, failure to thrive, and
multiple CABGs now in unit for shock – Suspect cardiogenic or septic
• Patient has reached 0.3 NE equivalents + vasopressin
• Should we start angiotensin II?
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PM: 85 year old female• Significant PMH including dementia, failure to thrive, and
multiple CABGs now in unit for shock – Suspect cardiogenic or septic
• Patient has reached 0.3 mcg/kg/min NE + vasopressin
• Should we start angiotensin II?
Technically we couldBut I vote no
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Next patient
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BA: 31 year old female• Newly diagnosed HIV patient presenting with
generalized weakness to ED
• Now on vasopressors with presumed septic shock
• PMH:– ESRD on HD– Depression on Cymbalta
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BA: 31 year old female• Now on escalating vasopressors despite hydrocortisone,
vitamin C, thiamine, and angiotensin II
• Team approaches you regarding selection of methylene blue or hydroxocobalamin for refractory shock
• Which do you choose?
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BA: 31 year old female• Now on escalating vasopressors despite hydrocortisone,
vitamin C, thiamine, and angiotensin II
• Team approaches you regarding selection of methylene blue or hydroxocobalamin for refractory shock
• Which do you choose?
Hydroxocobalamin
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Thank you!
• Peter Moran, PharmD, MSPS
• Aaron Morton, MMSc, PA-C, ATC, FAPACVS
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Update on Novel Shock Treatments and Approach to Utilization
Kayla A. Nichols, BS, PharmD, BCCCPClinical Pharmacist II, Critical Care
Emory University Hospital
Adjunct Clinical InstructorMercer University College of Pharmacy
Atlanta, Georgia