Priapism >4 Hours
Persistent erection unrelated to sexual stimulation
All Pathways
UrologyEmergency
Acute Ischemic Priapism Management (AUA/SMSNA 2021)
Acute Ischemic Priapism Management (AUA/SMSNA 2021): Priapism >4 Hours → Ischemic or Non-Ischemic? → ⚠️ ISCHEMIC PRIAPISM = EMERGENCY → Duration >36 Hou...
Pathway Overview
15 steps
Algorithm Steps
15 total
01Start 02Decision Ischemic or Non-Ischemic?
Critical first step - treatment differs significantly
- ISCHEMIC (low-flow): Painful, rigid, no trauma
- NON-ISCHEMIC (high-flow): Not painful, partial tumescence, trauma history
- Blood gas: Ischemic = dark blood, pO2 <30, pH <7.25
- Blood gas: Non-ischemic = bright red, pO2 >90, pH normal
03Warning ⚠️ ISCHEMIC PRIAPISM = EMERGENCY
Compartment syndrome of the penis - treat immediately
- Smooth muscle damage begins at 4-6 hours
- Irreversible damage by 24-48 hours
- Risk: Permanent erectile dysfunction
- Do NOT delay treatment
04Decision Duration >36 Hours?
Extended duration affects treatment approach
05Action First-Line: ICI + Aspiration
Intracavernous phenylephrine + corporal aspiration
- 19-21g butterfly needle into corpus
- Aspirate dark blood until bright red
- Phenylephrine 100-500 mcg/mL
- Inject 1 mL every 3-5 minutes
- Max ~1000 mcg (1 mg) total
- May irrigate with saline
06Action Phenylephrine Preparation
Dilute to 100-500 mcg/mL
- 1 mg (1 mL of 1mg/mL) in 9 mL NS = 100 mcg/mL
- Or use 200-500 mcg/mL concentration
- Inject 1 mL every 3-5 minutes
- Continue until detumescence or max dose
07Warning ⚠️ Monitor During ICI
Cardiovascular monitoring required
- Monitor BP and HR continuously
- Stop if severe HTN, bradycardia, arrhythmia
- Caution in cardiac disease
- Have resuscitation equipment available
- Avoid epinephrine (mixed alpha/beta)
08Decision Detumescence Achieved?
Assess response after ICI + aspiration
09Outcome Detumescence Achieved
Continue monitoring, urology follow-up
- Observe for recurrence
- Discharge with urology follow-up
- Counsel on ED risk
- Address underlying cause (PDE5i, injection therapy)
10Action Distal Corporoglanular Shunt
Second-line surgical intervention
- Winter shunt: Biopsy needle through glans
- Ebbehoj shunt: Scalpel through glans
- T-shunt: Scalpel + dilation
- Creates fistula between glans and corpora
- May add tunneling if unsuccessful
11Action Corporal Tunneling
If distal shunt fails
- Dilator passed through shunt site
- Creates channel to evacuate clot
- Proximal shunts (Quackels, Grayhack) if all else fails
- Higher complication rate
12Outcome High Risk of ED
Prolonged priapism often results in permanent ED
13Action Consider Early Prosthesis
In refractory cases or prolonged duration
- Discuss with patient early
- May prevent corporal fibrosis
- Easier insertion before fibrosis develops
- Alternative to repeated shunts
- Path rejoins step 12Shared downstream outcome
14Action Prolonged Priapism (>36h)
ICI less effective - consider primary shunt
- Smooth muscle may not respond to sympathomimetics
- Aspiration + ICI can still be attempted
- Lower threshold for proceeding to shunt
- Discuss realistic outcomes with patient
- Path rejoins step 08Shared downstream outcome
15Action Non-Ischemic Priapism
Not an emergency - can observe
- Usually follows perineal/penile trauma
- Initial management is conservative
- Ice, observation, compression
- Selective embolization if persistent
- Urology follow-up
Guideline Source
Acute Ischemic Priapism: An AUA/SMSNA Guideline
Clinical Safety Information
Clinical Decision Support — Not a Substitute for Clinical Judgment
Individual patient factors may require deviation from these recommendations.
Known Limitations
- Does not address non-ischemic (high-flow) priapism in detail
- Stuttering priapism requires different management approach
- Pediatric dosing not addressed
- Does not cover ED dysfunction management post-priapism
- Sickle cell disease may require additional hematology input
Contraindicated Populations
pediatric_dosing_not_specified
Applicable Regions
USEU
EU: EAU guidelines also recommend phenylephrine as first-line sympathomimetic
US: AUA/SMSNA 2021 guideline - phenylephrine is agent of choice
Version 1Next review: 2028-01-11
Next steps
Finish the workflow by opening the most relevant calculator, then convert the session into a live account when you are ready.
Related Resources
Frequently Asked Questions
What is the Acute Ischemic Priapism Management (AUA/SMSNA 2021)?
The Acute Ischemic Priapism Management (AUA/SMSNA 2021) is a emergency clinical algorithm for Urology. It provides a structured decision tree to guide clinical decision-making, based on Acute Ischemic Priapism: An AUA/SMSNA Guideline.
What guideline is the Acute Ischemic Priapism Management (AUA/SMSNA 2021) based on?
This algorithm is based on Acute Ischemic Priapism: An AUA/SMSNA Guideline (DOI: 10.1097/JU.0000000000002236).
What are the limitations of the Acute Ischemic Priapism Management (AUA/SMSNA 2021)?
Known limitations include: Does not address non-ischemic (high-flow) priapism in detail; Stuttering priapism requires different management approach; Pediatric dosing not addressed; Does not cover ED dysfunction management post-priapism; Sickle cell disease may require additional hematology input. Individual patient factors may require deviation from these recommendations.
Get AI-Powered Analysis Alongside This Algorithm
In AttendMe.ai, the Acute Ischemic Priapism Management (AUA/SMSNA 2021) appears automatically when your clinical question matches — alongside evidence from 3M+ peer-reviewed articles.
Try AttendMe Free