Bioreactor contamination monitoring using off-gassed volatile organic compounds (VOCs).

Metabolically active cells emit volatile organic compounds (VOCs) that can be used in real time to non-invasively monitor the health of cell cultures. We utilized these naturally occurring VOCs in an adapted culture method to detect differences in culturing Chinese hamster ovary (CHO) cells with and without Staphylococcus epidermidis and Aspergillus fumigatus contaminations. The VOC emissions from the cell cultures were extracted and measured from the culture flask headspace using polydimethylsiloxane (PDMS)-coated Twisters, which were subjected to thermal desorption-gas chromatography-mass spectrometry (TD-GC-MS) analysis.

A review of UK primary care pathways for acute ophthalmic conditions.

Care pathways for the management of acute ophthalmic conditions have developed and transformed significantly over recent years, owing to a combination of legislative changes, policy implementation and the pressing requirement to redistribute increased demand away from traditional secondary care providers through collaboration with primary care. Following UK healthcare devolution in 1999, each nation has developed and implemented their own strategies for managing the growing demands on acute ophthalmology services. Local commissioning across England has seen Enhanced Service Pathways develop to provide acute eye care by primary care optometrists, with provision and access dependent upon locality.

Defining VOC signatures of airway epithelial cells with PM2.5 exposure.

Volatile organic compounds (VOCs) produced by the lung in response to exposure to environmental pollutants can be utilized to study their impact on lung health and function. Previously, we developed a method to measure VOCs emitted from well-differentiated tracheobronchial epithelial cells in vitro. Using this method, we exposed well-differentiated proximal (PECs) and distal airway epithelial cells (DECs) to varying doses of traffic-related air pollutants (TRAP) and wildfire particulates to determine specific VOC signatures after exposure.

Patient preferences for ocular hypertension monitoring: a discrete choice experiment.

Background/aims: To elicit the preferences and calculate the willingness to pay (WTP) of patients with ocular hypertension (OHT) for eye monitoring services in the UK.

Methods: Patients with OHT aged at least 18 years recruited from four NHS ophthalmology departments were included in the study. Patients' preferences and WTP for an OHT monitoring service in the National Health Service were elicited using a discrete choice experiment (DCE) within a postal survey based on six attributes: (1) how OHT monitoring is organised, (2) monitoring frequency, (3) travel time from home, (4) use of a risk calculator for conversion to glaucoma, (5) risk of developing glaucoma in the next 10 years and (6) cost of monitoring.