# Exploratory Study of Cesarean Scar Healing After Interrupted Versus Continuous Sutures: Prospective Magnetic Resonance Imaging Assessment in Cynomolgus Monkeys

## TL;DR

A study in monkeys found that interrupted sutures may improve blood flow and tissue thickness in cesarean scars compared to continuous sutures.

## Contribution

This is the first prospective MRI-based study comparing cesarean scar healing using interrupted versus continuous sutures in non-human primates.

## Key findings

- DIS showed significantly higher uterine blood flow (Ktrans) compared to DCS at 6 months.
- Nonadhesive DIS animals had greater RMT and higher Ktrans than adhesive DIS animals.
- Nonadhesive DIS animals exhibited better outcomes than nonadhesive DCS animals in terms of RMT and blood flow.

## Abstract

This study evaluated the effects of double‐layer interrupted sutures (DIS) and double‐layer continuous sutures (DCS) on uterine blood flow and residual myometrial thickness (RMT) in cynomolgus monkeys after cesarean section (CS).

In DIS (n = 8) and DCS (n = 8) groups, uterine blood flow was assessed at 6 months post‐CS using MRI by Ktrans. RMT was measured by T2‐weighted magnetic resonance imaging (MRI) at 6 months. Laparoscopic evaluations were performed at 2 and 6 months.

At 6 months, Ktrans was significantly higher in the DIS group 6. RMT at the suture site did not differ significantly between groups. Adhesions were observed in three DIS and two DCS animals. Nonadhesive DIS animals had significantly higher Ktrans and greater RMT at 6 months compared with adhesive DIS animals. Nonadhesive DIS exhibited significantly higher Ktrans and greater RMT at 6 months than nonadhesive DCS.

While overall differences were limited, exploratory findings indicate that DIS demonstrated superior uterine blood flow compared with DCS. Nonadhesive DIS animals exhibited greater RMT than adhesive DIS animals, suggesting a potential benefit of adhesion prevention.

This graphical summary illustrates a prospective study evaluating cesarean scar healing after double‐layer interrupted sutures (DIS) versus double‐layer continuous sutures (DCS) in cynomolgus monkeys. At 6 months, MRI and laparoscopy revealed that DIS better preserved uterine blood flow and residual myometrial thickness (RMT) in nonadhesive cases.