Nose-only Exposure
Nose-only Exposure - Related Videos
07:28
Dry Powder and Nebulized Aerosol Inhalation of Pharmaceuticals Delivered to Mice Using a Nose-only Exposure System
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Cited by 11 •
2017
The inhalation unit described herein can generate, sample for characterization, and uniformly deposit a drug aerosol in the lungs of rodents. This enables the pre-clinical determination of the efficacy and safety of drug doses deposited in the lungs; key data enabling clinical inhaled drug development.
08:46
Nose, Sinuses, Oral Cavity and Pharynx Exam
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2023
Source: Richard Glickman-Simon, MD, Assistant Professor, Department of Public Health and Community Medicine, Tufts University School of Medicine, MA This video provides an overview of sinus, nose, and throat examinations. The demonstration begins with a brief overview of the anatomy of the region. The upper third of the nose is bony, and the bottom two-thirds are cartilaginous. Air entering the nares passes through the nasal vestibules and into the narrow passageway between the nasal septum...
05:07
Development of a Nose-only Inhalation Toxicity Test Chamber That Provides Four Exposure Concentrations of Nano-sized Particles
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Cited by 2 •
2019
A nose-only inhalation toxicity chamber capable of testing inhalation toxicity at four different exposure concentrations was designed and validated for flow field uniformity and cross-contamination between the exposure ports for each concentration. Here, we present a protocol to confirm that the designed chamber is effective for inhalation toxicity testing.
11:02
Fruit Volatile Analysis Using an Electronic Nose
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Cited by 10 •
2012
A rapid method for volatile compound analysis in fruit is described. The volatile compounds present in the headspace of a homogenate of the sample are rapidly separated and detected with ultra-fast gas chromatography (GC) coupled with a surface acoustic wave (SAW) sensor. A procedure for data handling and analysis is also discussed.
01:24
Nose and Nasal Cavity
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2025
The nose is composed of an observable exterior segment (external nose) and an internal segment within the skull known as the nasal cavity (internal nose). The external nose, visible on the face, consists of a framework of bone and hyaline cartilage enveloped in skin and muscle and lined with a mucous membrane. This structure is supported by the frontal bone, nasal bones, and maxillary bone and is supplemented by a cartilaginous framework comprising the septal nasal cartilage, lateral nasal...
FAQs
The inhaled dose is shaped by the concentration of the measured atmosphere, the airflow delivering it, and the length of exposure. Adjusting these variables allows researchers to examine dose-response relationships rather than treating exposure as a single fixed event. Maintaining consistent conditions is important because changes in airflow or duration can alter the amount reaching the respiratory tract.
Nose-directed delivery helps separate respiratory effects from contamination of the skin or fur. This distinction is useful when investigators want to determine how an aerosol, vapor, gas, or particulate substance enters and affects the respiratory tract. Limiting alternative exposure routes strengthens interpretation of findings related specifically to inhalation.
Breathing patterns, stress, and exposure uniformity can all influence the observed outcome. Differences in breathing may change the inhaled dose, while stress can affect how an individual responds during the study. Researchers therefore need careful monitoring and consistent exposure conditions so that biological findings are not attributed solely to the test atmosphere when procedural factors may contribute.
Its main advantage is greater control over the route being studied. By positioning the individual so the nose receives the measured atmosphere, researchers minimize exposure through the skin or fur and reduce contamination from those surfaces. This makes the approach particularly useful when the scientific question concerns respiratory entry, airway effects, or inhaled dose.
A basic workflow requires controlled positioning, delivery of a measured atmosphere to the nose, and regulation of concentration, airflow, and exposure duration. The setup should also support observation of exposure uniformity and the individual’s breathing-related response. Controlling these conditions helps connect the administered atmosphere with the resulting respiratory findings and dose-response pattern.
The approach can be used with aerosols, vapors, gases, and particulate substances. This range allows studies to address different airborne materials while maintaining attention to the inhaled route. The relevant exposure condition remains the measured atmosphere delivered through the nose, with concentration, airflow, and duration regulated to support comparison across study conditions.
It supports respiratory toxicology, drug delivery, airway inflammation, and dose-response studies. In these settings, controlling the inhaled atmosphere can help investigators examine how an airborne substance enters the respiratory tract and what effects follow. The method is therefore valuable when researchers need route-focused information rather than observations confounded by substantial skin or fur exposure.
Results can clarify relationships between an inhaled atmosphere, respiratory tract effects, and dose. However, conclusions require caution when breathing patterns, stress, or exposure uniformity are not adequately considered. These factors may influence the delivered or observed response, so a measured concentration alone does not fully describe the biological exposure experienced during the study.