High-Speed Fluorescence Imaging Corroborates Biological Data on the Influence of Different Nozzle Types on Cell Spray Viability and Formation
(2024) In Journal of Functional Biomaterials 15(5).- Abstract
Treating severe dermal disruptions often presents significant challenges. Recent advancements have explored biological cell sprays as a promising treatment, but their success hinges on efficient cell delivery and complete wound coverage. This requires a good spray distribution with a small droplet size, high particle number, and ample surface coverage. The type of nozzle used with the spray device can impact these parameters. To evaluate the influence of different nozzles on spray characteristics, we compared air-assisted and unassisted nozzles. The unassisted nozzle displayed small particle size, high particle number, good overall coverage, high cell viability, preserved cell metabolic activity, and low cytotoxicity. Air-assisted... (More)
Treating severe dermal disruptions often presents significant challenges. Recent advancements have explored biological cell sprays as a promising treatment, but their success hinges on efficient cell delivery and complete wound coverage. This requires a good spray distribution with a small droplet size, high particle number, and ample surface coverage. The type of nozzle used with the spray device can impact these parameters. To evaluate the influence of different nozzles on spray characteristics, we compared air-assisted and unassisted nozzles. The unassisted nozzle displayed small particle size, high particle number, good overall coverage, high cell viability, preserved cell metabolic activity, and low cytotoxicity. Air-assisted nozzles did not perform well regarding cell viability and metabolic activity. Flow visualization analysis comparing two different unassisted nozzles using high-speed imaging (100 kHz frame rate) revealed a tulip-shaped spray pattern, indicating optimal spray distribution. High-speed imaging showed differences between the unassisted nozzles. One unassisted nozzle displayed a bi-modal distribution of the droplet diameter while the other unassisted nozzle displayed a mono-modal distribution. These findings demonstrate the critical role of nozzle selection in successful cell delivery. A high-quality, certified nozzle manufactured for human application omits the need for an air-assisted nozzle and provides a simple system to use with similar or better performance characteristics than those of an air-assisted system.
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- author
- Heuer, Miriam ; Stiti, Mehdi LU ; Eras, Volker ; Scholz, Julia ; Ahmed, Norus ; Berrocal, Edouard LU and Brune, Jan C.
- organization
- publishing date
- 2024-05
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- burns, cell spray, high-speed imaging, keratinocytes, nozzles, PDA droplet sizing
- in
- Journal of Functional Biomaterials
- volume
- 15
- issue
- 5
- article number
- 126
- publisher
- MDPI AG
- external identifiers
-
- pmid:38786637
- scopus:85194229185
- ISSN
- 2079-4983
- DOI
- 10.3390/jfb15050126
- language
- English
- LU publication?
- yes
- id
- d6dbfd7d-60bf-4602-bc9b-a3dfb684475d
- date added to LUP
- 2024-09-02 09:46:35
- date last changed
- 2024-10-14 15:45:58
@article{d6dbfd7d-60bf-4602-bc9b-a3dfb684475d,
abstract = {{<p>Treating severe dermal disruptions often presents significant challenges. Recent advancements have explored biological cell sprays as a promising treatment, but their success hinges on efficient cell delivery and complete wound coverage. This requires a good spray distribution with a small droplet size, high particle number, and ample surface coverage. The type of nozzle used with the spray device can impact these parameters. To evaluate the influence of different nozzles on spray characteristics, we compared air-assisted and unassisted nozzles. The unassisted nozzle displayed small particle size, high particle number, good overall coverage, high cell viability, preserved cell metabolic activity, and low cytotoxicity. Air-assisted nozzles did not perform well regarding cell viability and metabolic activity. Flow visualization analysis comparing two different unassisted nozzles using high-speed imaging (100 kHz frame rate) revealed a tulip-shaped spray pattern, indicating optimal spray distribution. High-speed imaging showed differences between the unassisted nozzles. One unassisted nozzle displayed a bi-modal distribution of the droplet diameter while the other unassisted nozzle displayed a mono-modal distribution. These findings demonstrate the critical role of nozzle selection in successful cell delivery. A high-quality, certified nozzle manufactured for human application omits the need for an air-assisted nozzle and provides a simple system to use with similar or better performance characteristics than those of an air-assisted system.</p>}},
author = {{Heuer, Miriam and Stiti, Mehdi and Eras, Volker and Scholz, Julia and Ahmed, Norus and Berrocal, Edouard and Brune, Jan C.}},
issn = {{2079-4983}},
keywords = {{burns; cell spray; high-speed imaging; keratinocytes; nozzles; PDA droplet sizing}},
language = {{eng}},
number = {{5}},
publisher = {{MDPI AG}},
series = {{Journal of Functional Biomaterials}},
title = {{High-Speed Fluorescence Imaging Corroborates Biological Data on the Influence of Different Nozzle Types on Cell Spray Viability and Formation}},
url = {{http://dx.doi.org/10.3390/jfb15050126}},
doi = {{10.3390/jfb15050126}},
volume = {{15}},
year = {{2024}},
}