Nuutila Kristo, Yang Lu, Broomhead Michael, Proppe Karl, Eriksson Elof
Applied Tissue Technologies LLC, Hingham, Massachusetts.
Wound Repair Regen. 2019 Mar;27(2):162-169. doi: 10.1111/wrr.3. Epub 2018 Oct 31.
Negative pressure wound therapy (NPWT) promotes healing in acute or chronic wounds. Conventional NPWT devices consist of a filler (such as foam or gauze) that covers the wound and of a permeable membrane and tubing that connects the space under the membrane to a suction pump. The permeable membrane increases airflow and thus increases the required pump capacity that can cause patient discomfort or even ischemia in wounds with compromised vascularity. In addition, foam or gauze may fragment and become colonized with bacteria over time. To mitigate these, negative aspects, we have developed a new impermeable single layer component membrane dressing to deliver NPWT that does not need a foam or gauze to function. Therefore, the purpose of this study was to introduce this novel NPWT system (platform wound device, PWD) and evaluate its usability and effectiveness in the treatment of porcine full-thickness burns. A total of 48 burn wounds were created across four Yorkshire pigs on the dorsum. Wounds were created on day 0 and continuous NPWT with -50 mmHg and - 80 mmHg was initiated immediately. Subsequently, the burns were debrided on day 3 and animals were euthanized on day 7. The efficacy of the PWD on wound healing and reduction of bacterial burden was measured and compared to wounds that did not receive NPWT. The results showed that PWD promoted wound healing by outperforming the wounds that did not receive NPWT and that PWD was efficient at reducing bacteria from the burn eschar and from the wound bed. In conclusion, this study demonstrated that PWD promoted wound healing with a negative pressure as low as -50 mmHg, which likely benefits healing and avoids potential safety issues.
负压伤口治疗(NPWT)可促进急性或慢性伤口的愈合。传统的NPWT装置由覆盖伤口的填充物(如泡沫或纱布)、可渗透膜以及将膜下空间与抽吸泵相连的 tubing 组成。可渗透膜会增加气流,从而增加所需的泵容量,这可能会导致患者不适,甚至给血管功能受损的伤口带来局部缺血。此外,随着时间的推移,泡沫或纱布可能会破碎并被细菌定植。为了减轻这些负面影响,我们开发了一种新型的不透水单层组件膜敷料来进行NPWT,该敷料无需泡沫或纱布即可发挥作用。因此,本研究的目的是介绍这种新型NPWT系统(平台伤口装置,PWD),并评估其在治疗猪全层烧伤中的可用性和有效性。在四只约克郡猪的背部共制造了48处烧伤伤口。在第0天制造伤口,并立即开始使用-50 mmHg和-80 mmHg的持续NPWT。随后,在第3天对烧伤进行清创,并在第7天对动物实施安乐死。测量了PWD对伤口愈合和减少细菌负荷的疗效,并与未接受NPWT的伤口进行比较。结果表明,PWD通过优于未接受NPWT的伤口促进了伤口愈合,并且PWD在减少烧伤焦痂和伤口床中的细菌方面很有效。总之,本研究表明,PWD在低至-50 mmHg的负压下促进了伤口愈合,这可能有利于愈合并避免潜在的安全问题。