Septic Shock, Two Vasoactives, One Syringe Pump

Yes, with conditions. Short-term peripheral norepinephrine through a well-positioned peripheral catheter is accepted practice, and delaying vasopressors to place central access in a patient with a MAP of 58 costs perfusion. But the catheter and the monitoring have to be right.

Before departure

• Upsize if you can: an 18-gauge in a proximal forearm or antecubital vein is markedly safer than a 20-gauge in a hand or wrist. Re-site if the current catheter is distal, tortuous, or in an area you cannot see.
• Confirm free flow with no resistance, no swelling, no pain, and a blood return. Secure it so that vibration and stretcher movement cannot dislodge it.
• Use the standard concentration your service carries (for example 4 mg/250 mL = 16 mcg/mL); at 16 mcg/min that is 60 mL/h, which is tolerable through a 20-gauge. Do not concentrate the bag just to slow the rate - that increases the injury if it extravasates.

During transport

• Inspect the site every 5-10 minutes for the first 15 minutes, then at least every 15 minutes, and immediately with any unexplained change in blood pressure, heart rate, or line alarm.
• Carry phentolamine (5-10 mg in 10 mL) for local infiltration if extravasation occurs, and know where it is without looking.
• If the dose climbs past roughly 20-30 mcg/min, peripheral vasoconstriction will make the site progressively less reliable - reassess and consider whether this patient needs central access at the receiving end immediately on arrival.

Allocation

• Syringe pump: norepinephrine. It is the first-line agent with a mortality benefit, it needs fine-grained titration, and it is the drug you will be adjusting minute to minute.
• Phenylephrine: attempt to wean it off before departure. Phenylephrine is a pure alpha agonist with no inotropy and reflex bradycardia; it is doing nothing here that a slightly higher norepinephrine dose cannot do, and it adds extravasation risk without benefit. This is a conversation with the sending physician and the accepting intensivist, not a unilateral action.
• If they insist it continue, then this patient cannot travel on your current equipment. Options: bring a hospital pump with a commitment to return it, wait for a second syringe pump, or transfer on norepinephrine alone with push-dose backup. Do not improvise a gravity drip for a vasoactive.

Contingency for MAP below 65

1. Check the line, the pump, and the patient before touching the drug - a kinked catheter or an empty syringe looks exactly like worsening shock.
2. Titrate norepinephrine up in the increments your protocol allows.
3. Push-dose phenylephrine 50-200 mcg (100 mcg/mL) as a bridge while the infusion catches up - but watch for reflex bradycardia; she is at 128, so she has room, though not unlimited room.
4. Consider a 250-500 mL crystalloid bolus only if there is evidence of fluid responsiveness; she has already had 30 mL/kg and further indiscriminate volume will worsen pulmonary edema without raising MAP.
5. Reassess for a reversible cause you can act on in the back of an ambulance - is she bleeding, is the obstruction worse, is she getting the antibiotics.

Recognize what is being asked. This is not a safety threshold; it is a comfort target. A MAP of 75 in a septic patient who has already received 30 mL/kg is not more protective than 65, and the delay is paid for in time to source control and definitive care.

What the evidence supports

• The Surviving Sepsis Campaign recommends an initial MAP target of 65 mmHg, with individualization toward higher targets for patients with chronic hypertension or evidence of inadequate perfusion despite a MAP of 65.
• This patient's perfusion markers - lactate 7.4, urine output 10 mL/h, mottling - are the real target. A MAP of 68 with improving lactate and making urine is better than a MAP of 75 bought with another litre of crystalloid.

What to say

• Name the shared goal: 'We both want her perfused. Right now her MAP is 68 and we have a 75-minute drive. I think the thing most likely to save her kidney and her life is getting the obstruction relieved and getting her to an ICU bed, not another number in this ED.'
• Offer a concrete compromise: 'Give me ten minutes of titration on the norepinephrine while the crew loads. If she is not at 65 by then, we go anyway, and I will call you from the road if anything changes.'
• Document the conversation, the target agreed on, and the rationale. If the physician insists on a delay you believe is harmful, escalate to your medical director or the accepting intensivist rather than either capitulating or refusing unilaterally.