# Liquid Trisilanol i-Octyl POSS Achieves Rapid Hemostasis and Pneumostasis in Experimental Lung Injury

## TL;DR

A new liquid compound called POSS stops lung bleeding and air leaks quickly in pigs, potentially offering a solution for severe prehospital lung injuries.

## Contribution

The study introduces a novel liquid POSS compound that achieves rapid hemostasis and pneumostasis without compression in non-compressible lung injuries.

## Key findings

- POSS and PC achieved hemostasis in 8 out of 10 wounds, significantly better than untreated wounds.
- POSS and PC clotted wounds faster than gauze with compression, with PC being the fastest.
- Pneumostasis was achieved in all POSS, PC, and PK-treated wounds, but only after hemostasis in the GC group.

## Abstract

Background/Objectives: No effective intervention currently exists for non-compressible pulmonary injury, especially in a prehospital setting. Visco-liquids like trisilanol i-octyl POSS could remedy this. POSS resists hemorrhage and activates clotting; this can be augmented with kaolin (22.5%; PK) or chitin (10%; PC). Methods: We tested the efficacy of POSS, PK, and PC in treating incisional lung wounds in swine (39 ± 1 kg; n = 10). An incisional wound was made in the lung via a left thoracotomy, allowed to bleed freely for 30 s, and then no treatment (UNT), gauze with compression (GC), or POSS, PK, or PC was applied (1.5 mL). Each treatment was applied once per animal for a total of 5 wounds. Wounds were observed for 10 min for hemostasis and pneumostasis; GC treatments were assessed at 3 min intervals. Results: POSS and PC produced hemostasis in 8 of 10 wounds; GC: 7 (all significant from UNT); PK: 5 and UNT: 1. PK was not different from any group. POSS (2 ± 0.3 min) and PC (1.4 ± 0.4 min) clotted more quickly than GC (8 ± 3 min); PK was intermediate (3.8 ± 2 min) and not different from any other group. Pneumostasis was achieved in all POSS, PC, and PK, and only after hemostasis in the GC group. Conclusions: Because both POSS and PC provided quick and lasting hemorrhage and pneumatic control in this model, without need for compression, these results support the concept that these types of liquid POSS compounds could prove to be efficacious in prehospital treatment of non-compressible trauma wounds.