February 12, 2018

Peripheral Vasopressors: Safe or Dangerous?

Written by Salim Rezaie
REBEL EM
Medical Category: Resuscitation

Background: We have discussed the safety of peripheral vasopressors on REBEL EM before. In that review by Loubani et al was a systematic review of 85 articles and 270 patients. 95% of the extravasation events occurred in PIVs with infusions running greater than 4 hours and 85% of extravasation events occurred in PIVs distal to the antecubital fossa. The major limitation of this systematic review is that the majority of the data was derived from case reports and case series and not prospective trials. The authors of this current study sought to determine the incidence of complications of running vasopressors through PIVs in patients with circulatory shock in a prospective, observational trial.

What They Did:

Prospective observational study of patients with circulatory shock receiving vasopressors through a peripheral IV
Determine the complication rate from administration of vasopressors through peripheral IVs

Outcomes:

Primary: Complication rate
- Minor Complications: drug extravasation, thrombophlebitis, and localized cellulitis
- Major Complications: tissue necrosis and limb ischemia

Inclusion:

Patients presenting to the ED with circulatory shock
Vasopressor initiation through a PIV

Exclusion:

Refusal of consent (13 patients could not be recruited)

Results:

55 patients included
- In-Hospital Mortality Rate: 32.1%

Types of Shock:
- Septic: 83.6%
- Cardiogenic: 10.9%
- Hypovolemic/Hemorrhagic: 5.5%
Vasopressors Used:
- Norepinephrine: 90.9%
- Dopamine 9.1%
Site of PIV
- External Jugular: 3.6%
- Upper Arm: 1.8%
- Antecubital Fossa: 40%
- Forearm: 18.2%
- Hand 36.4%
Catheter Gauge
- 16: 10.9%
- 18: 36.4%
- 20: 50.9%
- 22: 1.8%
Median Duration of Vasopressor Infusion (Hrs):
- Norepinephrine or Dopamine: 14 (Range 7 – 40)
- Norepinephrine: 13 (Range 6.5 – 31.5)
- Dopamine: 53 (15.5 – 113)

Strengths:

Research fellows role was entirely observational and did not influence decisions
IVs physically examined 2x/day during vasopressor infusion and then daily up to 48 hours after discontinuation of vasopressor
Prospective study

Limitations:

Small patient population
Single center trial
Only norepinephrine and dopamine were studied (i.e. would have been nice to have a real mix of pressors such as epinephrine, etc)
No randomization
No comparator group

Discussion:

All 3 complications occurred in patients with 20g catheters, but due to the small number of complications it is difficult to conclude that 20g catheters should not be used
Specifics of the 3 complications:
- Patient 1: Local thrombophlebitis. Norepinephrine (8mg in 250mL D5W) through 20g catheter in right hand. Vasopressor infused for 40hrs with maximal infusion rate of 7ug/min
- Patient 2: Skin Pallor. Norepinephrine (8mg in 250mL D5W) through 20g catheter in left hand. Vasopressor infused for 11hrs with maximal infusion rate 7ug/min
- Patient 3: Non-Blanching Skin Erythema. Norepinephrine (8mg in 250 ML D5W) through 20g catheter in antecubital fossa. Vasopressor infused for 28hrs with maximal infusion rate19ug/min

Author Conclusion: “The incidence of complications from the administration of vasopressors through a PVC is small and did not result in significant morbidity in this study. Larger prospective studies are needed to better determine the factors that are associated with these complications, and identify patients in whom this practice is safe.”

Clinical Take Home Point: In patients with shock, use of peripheral vasopressors (Norepinephrine and Dopamine) in a large bore IV (18 – 20g) at a proximal site (antecubital fossa or more proximal) run for ≤4hrs or less is a safe option until more central access can be achieved.

References:

Medlej K et al. Complications from Administration of Vasopressors Through Peripheral Venous Catheters: An Observational Study. JEM 2018. PMID: 29110979

For More Thoughts on This Topic Checkout:

Post Peer Reviewed By: Anand Swaminathan swisstimepieces (Twitter: @EMSwami)

Cite this article as: Salim Rezaie, "Peripheral Vasopressors: Safe or Dangerous?", REBEL EM blog, February 12, 2018. Available at: https://rebelem.com/peripheral-vasopressors-safe-dangerous/.