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Remote Ischemic Conditioning (RIC) Decreases the Incidence and Severity of Necrotizing Enterocolitis (NEC) - Validation in a Large Animal Model

Video Published 2025-04-28 Updated 2026-08-01

Timestops (3)

0:00
RIC
RIC, or remote ischemic conditioning, has been shown to decrease rates of necrotizing enterocolitis in a rat model. But …
0:24
Rick was initiated at 24 hours of life and consisted of 4 cy…
Rick was initiated at 24 hours of life and consisted of 4 cycles of 4 minutes of arterial occlusion, followed by reperfu…
0:50
However, low frequency Rick did not.
However, low frequency Rick did not. So it seems like high frequency Rick protects against neck in a piglet model. Let u…

Topic Overview

A single-speaker summary of a preclinical study validating remote ischemic conditioning (RIC) in a piglet model of necrotizing enterocolitis. The speaker describes a randomized trial by Gadal et al. in which high-frequency RIC (four cycles of limb ischemia-reperfusion every 12 hours) significantly reduced NEC incidence compared to controls, while low-frequency RIC (every 24 hours) did not. The work extends earlier rat-model findings to a large-animal model.

Key Takeaways

  • High-frequency RIC (every 12h) significantly reduced NEC incidence in piglets; low-frequency (every 24h) did not. (0:45)
  • RIC protocol: 4 cycles of 4-min limb occlusion + reperfusion, started at 24h of life, validated in large-animal model. (0:24)
  • Piglet NEC model (n=86) confirms earlier rat findings: RIC frequency matters for neuroprotective effect. (0:00)

Inside this episode

Kai, the Library's AI content creator, listened to this episode and mapped who's speaking, the chapters, key claims, and cases. Every item links to the exact moment in the recording.

AI-enriched

Who's speaking

  • Alex Halpern — guest

Chapters

  • 0:00RIC for NEC prevention in a piglet model — Introduction to remote ischemic conditioning, study design by Gadal et al., randomization into control and two RIC-frequency arms, and primary outcome showing high-frequency RIC reduces NEC incidence.

Key claims

  • 0:00Remote ischemic conditioning has been shown to decrease rates of necrotizing enterocolitis in a rat model. — Alex Halpern
  • 0:16Gadal used an established piglet NEC model to test whether RIC works in a large animal model. — Alex Halpern
  • 0:20Piglets were randomly assigned to receive RIC or serve as controls. — Alex Halpern
  • 0:24RIC was initiated at 24 hours of life and consisted of 4 cycles of 4 minutes of arterial occlusion followed by reperfusion. — Alex Halpern
  • 0:31Cycles were repeated every 24 hours in the low-frequency group and every 12 hours in the high-frequency group. — Alex Halpern
  • 0:3738 piglets were randomized into the control group, 26 into the low-frequency group, and 22 into the high-frequency group. — Alex Halpern
  • 0:45High-frequency RIC significantly reduced the incidence of NEC when compared to controls. — Alex Halpern
  • 0:50Low-frequency RIC did not significantly reduce the incidence of NEC. — Alex Halpern
  • 0:53High-frequency RIC protects against NEC in a piglet model. — Alex Halpern

Open questions

  • What is the mechanism by which high-frequency RIC reduces NEC incidence?
  • Will these piglet-model findings translate to human neonates?
This episode was analyzed and enriched by Kai, the Library's AI content creator. Every item links to the moment it comes from — click a timestamp to listen in context.

High-Frequency Remote Ischemic Conditioning Reduces NEC in Piglet Model

The essential version of this episode — what it covers, the points that matter most, and what it changes for you. Written by Kai from the episode transcript and reviewed before publishing.

For trainees · Core brief · AI-written, human-reviewed

What this study tested

Remote ischemic conditioning has been shown to decrease rates of necrotizing enterocolitis in a rat model 0:00. Gadal used an established piglet NEC model to test whether RIC works in a large animal model 0:16.

Study design and intervention

Piglets were randomly assigned to receive RIC or serve as controls 0:20. RIC was initiated at 24 hours of life and consisted of 4 cycles of 4 minutes of arterial occlusion followed by reperfusion 0:24. The study tested two dosing schedules: cycles were repeated every 24 hours in the low-frequency group and every 12 hours in the high-frequency group 0:31. 38 piglets were randomized into the control group, 26 into the low-frequency group, and 22 into the high-frequency group 0:37.

Key findings

High-frequency RIC significantly reduced the incidence of NEC when compared to controls 0:45. Low-frequency RIC did not significantly reduce the incidence of NEC 0:50. High-frequency RIC protects against NEC in a piglet model 0:53.

What this means

The dose-response relationship matters: applying the same ischemic conditioning protocol twice as often changed the outcome from no effect to significant protection. This suggests that if RIC is to be translated to human neonates, the frequency of cycling will be a critical variable to optimize. The piglet model is physiologically closer to human infants than rodent models, making this validation step important before clinical trials.

Takeaways from this story

  • High-frequency RIC (every 12 hours) reduced NEC incidence in piglets; low-frequency (every 24 hours) did not.
  • RIC protocol: 4 cycles of 4 minutes arterial occlusion with reperfusion, started at 24 hours of life.
  • Piglet model validation supports translating RIC from rodent studies toward potential human trials.

Keywords

necrotizing enterocolitis remote ischemic conditioning arterial occlusion Children's National

Hashtags

#NecrotizingEnterocolitis #RemoteIschemicConditioning #NeonatalSurgery #TranslationalResearch

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