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Mannitol and the blood-labyrinth barrier

Overview of attention for article published in Journal of Otolaryngology -- Head & Neck Surgery, December 2017
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1 tweeter

Citations

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1 Dimensions

Readers on

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4 Mendeley
Title
Mannitol and the blood-labyrinth barrier
Published in
Journal of Otolaryngology -- Head & Neck Surgery, December 2017
DOI 10.1186/s40463-017-0245-8
Pubmed ID
Authors

Trung N. Le, Brian W. Blakley

Abstract

Characterization of the blood labyrinth barrier (BLB) is extremely important to determine whether the BLB can be manipulated pharmacologically. However, experiments to investigate the BLB are technically difficult to perform. In this report, we demonstrated a unique method of controlling the BLB, and established the pharmacokinetics of gentamicin in perilymph, cerebrospinal fluid (CSF) and blood with and without mannitol. Controlled animal research project. Permeability of the BLB and the blood brain barrier (BBB) to gentamicin with and without mannitol was studied by collecting 175 samples from 44 guinea pigs using concentrations relevant to human clinical situations. Samples were taken from two groups of 22 animals, with each animal undergoing sampling at a different time after administration of either 10 mg/ml gentamicin (4 mg/kg) (Gardena, CA) alone or gentamicin with 20% mannitol (250 mg/kg) (Mallinckrodt Inc., KY). The sample times varied from 0.5 to 17.5 h post-infusion. Samples were also taken from 4 animals as negative controls after administration of normal saline. Our goal was to simultaneously assess the pharmacokinetics of gentamicin in each of three different fluid samples in the same animal. Thus at the pre-determined post-infusion sampling time, each animal was sampled once for perilymph, CSF, and blood before being euthanized. Each animal contributed to a single time point on the subsequent pharmacokinetic curves with more than one animal per time point. Mannitol increased the rate of entry and egress of gentamicin through BLB significantly (p = 0.0044) but the effects on the BBB did not reach statistical significance (p = 0.581). Mannitol did not alter renal clearance of gentamicin from the blood (p = 0.433). The concentration of gentamicin in perilymph and CSF was always significantly lower than in blood. Mannitol administration transiently increases the permeability of the BLB. Potential clinical benefits may accrue from selected timing of administration of osmotic agents such as mannitol augmenting the rate of entry and egress of compounds such as gentamicin into and out of perilymph.

Twitter Demographics

The data shown below were collected from the profile of 1 tweeter who shared this research output. Click here to find out more about how the information was compiled.

Mendeley readers

The data shown below were compiled from readership statistics for 4 Mendeley readers of this research output. Click here to see the associated Mendeley record.

Geographical breakdown

Country Count As %
Unknown 4 100%

Demographic breakdown

Readers by professional status Count As %
Student > Ph. D. Student 1 25%
Student > Master 1 25%
Researcher 1 25%
Unspecified 1 25%
Readers by discipline Count As %
Unspecified 2 50%
Biochemistry, Genetics and Molecular Biology 1 25%
Medicine and Dentistry 1 25%

Attention Score in Context

This research output has an Altmetric Attention Score of 1. This is our high-level measure of the quality and quantity of online attention that it has received. This Attention Score, as well as the ranking and number of research outputs shown below, was calculated when the research output was last mentioned on 13 December 2017.
All research outputs
#7,680,550
of 12,292,436 outputs
Outputs from Journal of Otolaryngology -- Head & Neck Surgery
#82
of 248 outputs
Outputs of similar age
#191,906
of 344,918 outputs
Outputs of similar age from Journal of Otolaryngology -- Head & Neck Surgery
#8
of 25 outputs
Altmetric has tracked 12,292,436 research outputs across all sources so far. This one is in the 23rd percentile – i.e., 23% of other outputs scored the same or lower than it.
So far Altmetric has tracked 248 research outputs from this source. They receive a mean Attention Score of 2.6. This one is in the 36th percentile – i.e., 36% of its peers scored the same or lower than it.
Older research outputs will score higher simply because they've had more time to accumulate mentions. To account for age we can compare this Altmetric Attention Score to the 344,918 tracked outputs that were published within six weeks on either side of this one in any source. This one is in the 34th percentile – i.e., 34% of its contemporaries scored the same or lower than it.
We're also able to compare this research output to 25 others from the same source and published within six weeks on either side of this one. This one has gotten more attention than average, scoring higher than 60% of its contemporaries.