ArticleFrontiers in medicine2026
Distal radial artery cannulation in the Hegu (LI4) region for perioperative invasive arterial blood pressure monitoring: two case reports.
Article in Frontiers in medicine, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
What it found
Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.
The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.
Who cites it
0 citing papers in PubMed.
No citing paper in PubMed yet.
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
6 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Background: Invasive arterial blood pressure monitoring is essential for perioperative hemodynamic management. While proximal radial artery cannulation is widely used due to its ease and low complication rate, it is unsuitable for patients with upper-limb trauma, wrist/forearm surgery, local soft-tissue injury, or prior vascular injury from puncture. Distal radial artery access at the Hegu (LI4) region-originally developed for cardiovascular procedures-offers a viable alternative: it lies superficially, is less affected by wrist motion, and benefits from collateral perfusion via the ulnar artery and palmar arches. Case presentation: Two patients required alternative arterial access due to limited conventional proximal radial artery access. Case 1: a 41-year-old woman after emergency right upper-limb replantation for traumatic amputation. Case 2: a 50-year-old man after debridement, internal fixation, and free anterolateral thigh flap reconstruction for a severe right-hand crush injury. In both, the left distal radial artery (Hegu region) was used for invasive arterial pressure monitoring. Under local anesthesia and ultrasound-guided out-of-plane puncture, a 20-gauge arterial catheter was successfully placed on the first attempt (puncture-to-placement time: 25-30 s). Catheters remained in place for 24-48 h. Waveforms were clear, stable, and unaffected by wrist motion. Invasive pressures matched non-invasive measurements at concurrent time points-though formal agreement analysis was not performed. After removal, puncture sites healed without complications (no bleeding, hematoma, infection, nerve injury, radial artery occlusion, or hand ischemia). One patient reported mild soreness (VAS = 1). Conclusion: Distal radial artery cannulation in the Hegu region may be a feasible and well-tolerated alternative for perioperative invasive arterial pressure monitoring when conventional proximal radial artery access is unavailable or undesirable. Potential advantages include a puncture site away from the wrist joint, stable catheter fixation, good patient tolerance, and preserved collateral circulation.
Indexed as
Identifiers
What OpenQuestion holds
Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.