What question did this study set out to answer?

To evaluate how glutaraldehyde fixation pressure and external constraint simulating a rigid stent affect leaflet coaptation in porcine aortic valves.

August 1, 1982ThoraxOpen Access

Effect of glutaraldehyde fixation and valve constraint conditions on porcine aortic valve leaflet coaptation.

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Why the study?

Does low-pressure glutaraldehyde fixation improve leaflet coaptation in porcine aortic valves compared to high-pressure fixation?

Population

14 porcine aortic valves

Comparison

Glutaraldehyde fixation at low pressure and… vs Glutaraldehyde fixation at high pressure

Design

Preclinical

Authors

NBNeil D. BroomUniversity of Auckland DMDiego E. MarraQueen Mary University of London

Discussion

Member takes

Implication

Low-pressure fixation improved coaptation in this porcine model; leaves open translation to clinical bioprostheses.

Key Points

To evaluate how glutaraldehyde fixation pressure and external constraint simulating a rigid stent affect leaflet coaptation in porcine aortic valves.
Examined 14 porcine aortic valves fixed with glutaraldehyde at either low pressure (~1 mm Hg, n=8) or high pressure (80 mm Hg, n=6).
Assessed leaflet coaptive margins and ratios during unconstrained inflation to 80 mm Hg and under simulated rigid stent constraint.
Low-pressure-fixed valves showed significantly improved coaptive ratios for the left and right coronary leaflets relative to high-pressure-fixed valves.
Unconstrained inflation to 80 mm Hg caused peeling back of the coaptive margins in low-pressure-treated valves, which did not occur in high-pressure-treated valves.
Imposing rigid constraint during inflation reduced or eliminated leaflet peeling in low-pressure-fixed valves, increasing coaptive margin width and conferring superior coaptation over high-pressure-fixed valves.

Structured PICO

Does low-pressure glutaraldehyde fixation improve leaflet coaptation in porcine aortic valves compared to high-pressure fixation?

Population

14 porcine aortic valves

Intervention

Glutaraldehyde fixation at low pressure (congruent to 1 mm Hg) and subsequent valve constraint

Comparator

Glutaraldehyde fixation at high pressure (80 mm Hg)

Outcome

Coaptive ratios of the left and right coronary leafletssurrogate

Low-pressure glutaraldehyde fixation of porcine aortic valves improves leaflet coaptation compared to high-pressure fixation, supporting its use in bioprosthetic valve preparation.

Cite This Study

Broom et al. (1982) studied this question.

synapsesocial.com/papers/6a93be9940aff459acebcb0e https://doi.org/10.1136/thx.37.8.620

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Effect of glutaraldehyde fixation and valve constraint conditions on porcine aortic valve leaflet coaptation.

Discussion

Member takes

Implication

Key Points

Structured PICO

Cite This Study

Effect of glutaraldehyde fixation and valve constraint conditions on porcine aortic valve leaflet coaptation.

Discussion

Member takes

Implication

Key Points

Structured PICO

Cite This Study

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Also Consider