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Biomedical subjects

J Moser

Publications and source records attributed to J Moser.

At least 55 records · Page 3Linked to original sources
PubMed1984

[Prospective study of complications of central venous catheters].

The complications of central venous catheters used for immediate postoperative nutrition and monitoring were evaluated in 120 patients. Two patients had to be excluded due to an irregular protocol. 149 central venous catheters were placed in the remaining 118 patients. As to the access, the subclavian vein was used in 72.3%, the v. jugularis interna in 18.9%. The catheters were in average 11.7 days in place giving a total of 1392 catheter days. The end of therapy was the most frequent reason for removal of the catheter (81.6%) followed by septic (4.1%) and mechanical problems (8.8%). Venous thrombosis was observed in 2 patients, and embolisation of a catheter fragment and acute infusothorax each in 1 patient. 13% of the catheters were found to be malpositioned, and malposition was identified as a risk factor for thrombosis.--It is concluded from the comparison of these results with the literature, that the central venous catheter for parenteral nutrition has a risk of complication greater than 5% and therefore requires a clear indication. X-ray-control of catheter position is obligatory and malpositioned catheters are to be corrected. If the parenteral regimen is low in glucose concentration and osmolarity, blood sampling and monitoring via the same central venous line does not appear to increase the rate of complications.

Adult↗
PubMed1983

Multielectron storage and hydrogen generation with colloidal semiconductors.

Multielectron storage and hydrogen generation by light is achieved in aqueous dispersions of ultrafine TiO(2) particles (120-A diameter) when the amphiphilic viologen derivative N-tetradecyl-N'-methyl-4,4'-dipyridinium dichloride (C(14)MV(2+)) is used as an electron relay. Consecutive reduction of C(14)MV(2+) to the radical ion (C(14)MV(+)) and neutral (C(14)MV(0)) was observed after band-gap excitation of the semiconductor particle. Through surface adsorption of the relay, these electron-transfer reactions can occur very rapidly and are completed within less than 100 musec (pH 11). Two-electron reduction of C(14)MV(2+) can be coupled with H(2) generation in alkaline medium in the presence of Pt catalyst codeposited onto the TiO(2) particle. Electron-relay-free systems are 1/15th as efficient in producing H(2) at the same pH.

Journal Article↗
PubMed1977

A clinical evaluation of semiprecious alloys for dowels and cores.

The semiprecious metals investigated and hard dental gold alloys may be manipulated in a similar manner. The semiprecious metals produced accurate and well-fitted dowels needing minimal adjustment. Being harder than type III gold alloy, they would be ideal for casting dowels and cores. Before considering these semiprecious alloys as final restorations, however, they must be further examined for resistance to tarnish and corrosion and their marginal adaptability and burnishability.

Crowns↗