Spray Pattern & Plume Geometry Testing

Aerosol Science

Laser-sheet imaging on a controlled actuation rig with LaVision analysis — replicate-traceable plume geometry and pattern datasets aligned to FDA nasal-spray guidance.

Purpose & when to use

Spray Pattern and Plume Geometry (SP / PG) testing quantifies how an atomized spray expands in air and deposits on a target — plume angle, width, and pattern diameter — for nasal sprays, oral sprays, and pressurized consumer aerosols. Laser-sheet imaging on a controlled actuation rig with LaVision analysis delivers FDA-aligned nasal-spray submission packages under USP <601>; the same fixtures support development screening and root-cause work. SP / PG is foundational for:

FDA-aligned nasal spray submission packages — plume geometry within ~30 ms of actuation plus spray pattern at FDA-recommended capture distances, framed under FDA nasal / oral spray guidance and USP <601>.
Lot-to-lot and design-change comparability for nasal pumps, oral spray valves, and aerosol actuators — pump, nozzle, valve, or formulation updates under ICH Q5E and FDA change-control guidance with documented replicates.
Robustness mapping across actuation force, fill level, viscosity, and temperature for consumer aerosols and pump sprays — supports EPA registration packages and ISO 27427-aligned nebulizing-equipment characterization.
Root-cause investigation of asymmetric sprays, plume tailing, intermittent actuation, and pattern drift across canister life — pairs with high-speed imaging under FDA inspection-readiness and ICH Q9 quality-risk principles.
Pump and valve development DOE studies on nozzle geometry, swirl chamber, and metering tweaks — fast iteration on the same fixtures that anchor submission work under FDA development-stage CMC guidance.

Use SP / PG testing when the device's emitted spray geometry drives the regulatory question — local deposition for nasal-spray bioavailability, coverage uniformity for consumer sprays, or sensitivity to formulation and actuation conditions — and you need imaging data traceable to a defined fixture, distance, and acceptance criteria for image quality.

Built for sprays, nasal devices, and pressurized aerosols

Spray pattern and plume geometry characterization spans the device classes that put atomized formulations into the air — pharmaceutical, consumer, and industrial spray products under one analytical roof.

Nasal sprayIntranasal pumps and devices
Oral spraySublingual and topical-oral
Pressurized aerosolPropellant-driven cans
Pump sprayMechanical pump bottles
Consumer aerosolSprays · fogs · misters

Instrumentation & measurement ranges

We pick imaging configuration by device type and the decision the data has to support — submission-grade fixtures and development-screening fixtures share a measurement basis.

10 – 200 mmoptical

Laser-sheet / planar illumination imaging

Thin planar illumination of the spray cross-section at controlled standoff distances — the regulator-aligned basis for plume angle and width. Synchronization with actuation captures the plume within milliseconds of fire.

1 – 1000 mstime-window

Plume Master actuation rig (in-house)

Custom in-house actuation fixture with stepper-driven force, displacement, and timing control — repeatable shot-to-shot capture for plume geometry datasets across single-actuation and full-canister studies.

30 – 60 mmcapture-distance

LaVision DaVis image-analysis software

Quantitative extraction of plume boundary, plume angle, pattern diameter, area, ellipticity, and circularity — calibrated pixel-to-mm scaling with documented acceptance criteria for focus and saturation.

0.1 – 980 µmdiffractive

Malvern Spraytec (paired droplet sizing)

Volume-weighted droplet spectra running alongside SP / PG when the program needs droplet-size and plume-geometry data on a matched set of actuations — pairs the two attributes on a single canister.

Test method options

Method	Strengths	Tradeoff	Aligned with
Regulator-aligned nasal / oral spray SP-PG (submission package)	Plume angle, width, and pattern at FDA-recommended distances with controlled actuation — the canonical ANDA / NDA submission package. Replicates at beginning, middle, and end of canister with documented acceptance criteria — submission-ready figures and statistics out of the box.	More fixture setup and image-acceptance overhead than screening — best when the device is locked and the data is filing-bound.	FDA nasal / oral sprayUSP <601>
Development screening for pump / nozzle / valve iteration	Fast feedback for design changes — same fixtures as the submission method, but reduced replicates and acceptance bands tuned for iteration. Supports DOE sweeps across nozzle geometry, swirl chamber, valve metering, and viscosity to map each variable's effect on plume and pattern.	Not sufficient on its own for formal comparability without added replicates and controls; bridge to the submission method before filing.	—
Robustness mapping across actuation and environment	Surfaces the use-condition envelope across actuation force, fill level, viscosity, and temperature where plume and pattern stay in spec. Output feeds change-control packages and predicate comparisons under FDA nasal / oral spray framing when product variations are assessed.	More conditions per study increase sample count and analysis time — scope tightly to the variables that drive the decision.	FDA nasal / oral spray
Failure investigation (asymmetry · tailing · intermittent spray)	Targets root causes of sprayability defects with iterative fixture work — pairs naturally with high-speed imaging for time-resolved diagnostics. Documented under ICH Q9 quality-risk framing so the investigation output supports CAPA packages and inspection-readiness narratives.	Often needs iterative fixture and acceptance-criteria tweaks — schedule unpredictability is higher than a fixed-protocol study; budget two or three rounds.	ICH Q9
Paired SP-PG plus droplet sizing (Malvern Spraytec)	One set of actuations yields plume geometry, spray pattern, and droplet-size distribution — the trio that governs nasal-spray local deposition. Strong framing for in vitro bioequivalence packages and predicate comparisons where the regulator wants the full sprayability picture, not three separate studies.	Higher instrumentation and analyst overhead per condition — reserve for programs where the combined dataset materially changes the submission strategy.	FDA nasal / oral sprayUSP <601>

Setup configurations

Every spray-pattern study runs on a configuration matched to the device, the use condition, and the decision the data has to support. Fit-for-purpose setup balances submission rigor — controlled actuation, distance, and image acceptance — with the realities of the device under test. The dimensions below are the levers we set at study planning to keep plume and pattern data interpretable and defensible:

Device interfaces

Adapters for nasal pumps, oral spray valves, pressurized canisters, pump bottles, and consumer triggers — geometry and orientation matched to the device under test and the regulatory question.

Flow & actuation profiles

Stepper-controlled force, displacement, velocity, and dwell — manual, pneumatic, or mechanical fixtures sized to mimic patient or operator use conditions with shot-to-shot repeatability.

Sample numbers

Replicate actuations per condition (typically n=15+ for submission work spanning beginning-middle-end of canister), with power sized to declared shot-to-shot and device-to-device variability.

Environmental controls

Temperature and humidity controlled and logged where viscosity, propellant, or actuator response is sensitive — environment recorded alongside each capture in the chain of custody.

Calibration & verification

Pixel-to-mm scaling, laser sheet alignment, and actuation force / displacement verified against traceable standards before each campaign and re-verified between condition blocks.

Methods anchored to the standards that matter

Every spray-pattern study runs inside a documented quality system aligned to nasal-spray, oral-spray, and consumer-aerosol regulatory frames. The four anchors below define the data contract carried through to §7 outputs.

ISO 17025AccreditedTesting-laboratory competence — documented methods, calibration traceability, and uncertainty contributors.
FDA nasal / oral sprayAlignedBioequivalence and CMC framing for nasal and oral spray submissions.
USP <601>AlignedAerosols, nasal sprays, MDIs, and DPIs — performance quality tests.
ISO 27427AlignedAnaesthetic and respiratory equipment — nebulizing systems and components.

Key data outputs & reporting

Every spray-pattern study delivers a documented set of plume and pattern metrics plus the underlying image data — plume angle and width versus distance, spray pattern diameter, area, circularity and ellipticity, qualitative uniformity flags, summary statistics across replicates, and traceable QA / QC controls — formatted for regulatory submission, change-control packages, or design iteration. The deliverables below cover the standard SP / PG report; complex programs (comparability, predicate studies, full canister-life mapping) get an extended package with the artifacts beneath the table.

Primary outputs

Plume angle and plume width versus capture distance with shot-to-shot replicate statistics (mean, SD, CV per condition).
Spray pattern diameter, area, ovality / ellipticity, circularity, and qualitative uniformity indicators on a defined target plane.
Annotated overlays comparing lots, devices, actuation conditions, or beginning-middle-end canister positions against predicate, control, or specification baselines.

Deliverables

#	Format	Contents
01	PDF report	Methods, fixtures, acceptance criteria, and results tables.
02	CSV / XLSX datasets	Plume and pattern metrics with replicate statistics.
03	Annotated images and clips	Laser-sheet captures and side-by-side overlays for internal reviews and submission appendices.

Extended deliverables · multi-arm comparability · stability · predicate studies

Comparability appendix — Side-by-side plume / pattern overlays plus statistical equivalence tests per ICH Q1E or product-specific predicate framing.
Canister-life mapping pack — Plume and pattern trends across beginning-middle-end actuation positions with predefined acceptance bands flagged.
Method-development notes — Documentation of fixture-selection rationale, image acceptance criteria, and uncertainty contributors — for submission cover letters and inspection readiness.

QA / QC & data integrity

Every spray-pattern study ships with a documented QA / QC envelope sized to the method plan — controls and verifications calibrated to the regulatory frame, the imaging chemistry, and the decision the data supports. The checks below run alongside laser-sheet capture, audited under our ISO 17025 quality system and traceable from sample receipt through final result. Recovery and environmental monitoring get added when the assay demands them.

Image calibration checks for pixel-to-mm scale, laser sheet alignment, and background subtraction before each capture block.

Replicate actuations and repeat runs to quantify variability across canister position, devices, and lots.

Defined acceptance criteria for image focus, saturation, plume boundary definition, and background contrast at the capture distance.

Actuation force, displacement, and distance verification logs alongside captured images and analyzed metrics.

Chain of custody from sample receipt through image acquisition, analysis exports, and final reporting.

Why ARE Labs

ARE Labs connects technical topics to practical study design, method selection, controlled aerosol work, and reportable evidence without turning technical pages into sales pages.

Reviewed byJamie Balarashti (25 yrs - cascade & inhalation methods) - Weston Schaper (7 yrs - real-time sizing & nanoparticle work)

17025Accredited testing

900+Studies Performed

17+Years in operation

300+Clients supported

Common questions

Quick answers to the questions nasal-spray, consumer-aerosol, and pump-spray teams ask most often when scoping a spray-pattern and plume-geometry study — method selection, actuation control, replicate counts, comparability framing, and deliverables. The answers below are starting points, not protocols; reach out if your device, formulation, or regulatory frame doesn't match what's here, since most SP / PG studies need at least one custom fixture or acceptance-criteria choice that's easier to walk through on a call than to anticipate in a FAQ.

Q.What is the difference between plume geometry and spray pattern?

A.Plume geometry describes the expanding spray shape in air — plume angle and plume width measured in flight. Spray pattern describes the deposited distribution on a defined target plane — diameter, area, and circularity. Most nasal-spray submissions report both.

Q.How many actuations are needed per condition?

A.It depends on device variability and the comparability goal. Submission packages typically run n=15+ across beginning-middle-end of canister; development screening often runs fewer. We plan replicate counts at study planning to meet the precision target.

Q.Can you control actuation force and timing?

A.Yes. Our Plume Master rig drives force, displacement, velocity, and dwell with stepper control — manual, pneumatic, or mechanical fixtures sized to mimic patient or operator use across the range of actuation profiles a study calls for.

Q.Do you support FDA-aligned nasal spray submissions?

A.Yes. We run plume geometry at the FDA-recommended capture distances (typically 30 mm and 60 mm) with documented acceptance criteria, aligned to FDA nasal / oral spray guidance and USP <601> framing for submission packages.

Q.What do you deliver?

A.A PDF report with methods, fixtures, and results tables; CSV / XLSX datasets for plume and pattern metrics with replicate statistics; and annotated images plus side-by-side overlays for internal reviews and submission appendices.

Standards & guidance

Spray-pattern studies at ARE Labs run aligned to the regulatory and consensus standards governing nasal-spray, oral-spray, and consumer-aerosol products. Where we hold third-party accreditation for a scope, methods are documented as accredited (ISO 17025); where the standard is followed but not formally accredited, methods are aligned or conformant where applicable. The cards below list the standards most often relevant to SP / PG packages — click any card to see the standard's role in a study, the deliverables it drives, and the tests we run that cite it.

Inhalation & Drug Delivery - Aligned

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