scholarly journals A unique case report of a high-pressure paint injection injury of the hand with associated carbapenemase resistant Pseudomonas aeruginosa infection

2020 ◽  
Vol 2020 (7) ◽  
Author(s):  
Kurt Barger ◽  
Ryne Jenkins ◽  
Bruce Weng ◽  
Juston Fan ◽  
Loren Tholcke ◽  
...  

Abstract High pressure injection injuries to the hand should not be taken lightly as urgent surgical debridement is required to ensure favorable outcomes. Empiric antibiotic administration is recommended; however, few studies focus on the secondary infection risk associated with these high pressure injection injuries. We present a rare case of a patient presenting with carbapenem resistant Pseudomonas aeruginosa following a high pressure paint gun injury of the thumb. Urgent surgical debridement with administration of broad-spectrum antibiotic coverage for both gram-negative and gram-positive bacteria is recommended. The injection of foreign materials can cause extensive tissue damage and immunosuppression facilitating growth of opportunistic bacteria that are often rare in healthy adults. We advocate for obtaining cultures at initial debridement to optimize treatment in these unique and rare injection injuries. Concerns should be raised as carbapenem resistant bacteria become more prevalent in the community.

2021 ◽  
Author(s):  
Long Liu ◽  
Tianyang Dai ◽  
Qian Xiong ◽  
Yuehua Qian ◽  
Bo Liu

Abstract With increasingly stringent emissions limitation of greenhouse gas and atmospheric pollutants for ship, the direct injection of natural gas on the cylinder head with high-pressure injection is an effective method to make a high power output and decrease harmful gas emissions in marine natural gas dual fuel engines. However, the effects on mixing characteristics of high-pressure natural gas underexpanded jet have not been fully understood. Especially, the injection pressure is up to 30 MPa with large injection quantity and critical surrounding gas conditions for the low-speed two-stroke marine engine. Therefore, this research is focused on the flow and mixing process of the natural gas jet with high-pressure injection under the in-cylinder conditions of low-speed two-stroke marine engine. The gas jet penetration, the distribution of velocity and density, the equivalence ratio and air entrainment have been analyzed under different nozzle hole diameters by numerical simulation. The effects of surrounding gas conditions including pressure, temperature and swirl ratio on air entrainment and equivalence ratio distribution were studied in detail. From the numerical simulation, it is found that the mixing characteristics of natural gas jet can be improved under in-cylinder conditions of higher ambient temperature and swirl ratio, which is relevant to the low-speed two-stroke marine engine.


1998 ◽  
Vol 47 (3) ◽  
pp. 995-997
Author(s):  
Goichi Okahara ◽  
Hiroshi Hokama ◽  
Kunihiko Uehara ◽  
Fuminori Kanaya

MTZ worldwide ◽  
2017 ◽  
Vol 78 (5) ◽  
pp. 50-57 ◽  
Author(s):  
Junmei Shi ◽  
Pablo Lopez Aguado ◽  
Noureddine Guerrassi ◽  
Gavin Dober

Author(s):  
Ayman El-Menyar ◽  
Mohammad Muneer ◽  
Saif Badran ◽  
Ali Alkhafaji ◽  
Habib Al-Basti ◽  
...  

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