Pulmonary Function Testing (Spirometry) for Employers
Silicosis is irreversible. Asbestosis is irreversible. Coal workers’ pneumoconiosis is irreversible. Occupational asthma caused by isocyanate sensitization is irreversible. By the time your employee has symptoms – chronic cough, exertional dyspnea, reduced exercise tolerance – the lung damage has been accumulating for years. The clinical window for early detection, workplace intervention, and exposure modification closed while nobody was measuring lung function.
Pulmonary function testing – specifically occupational spirometry – is the clinical tool that detects respiratory impairment before it becomes occupational disease. OSHA mandates spirometry under multiple substance-specific standards because it is the earliest objective indicator that workplace exposure is damaging an employee’s lungs. A properly conducted baseline spirometry establishes normal lung function. Periodic spirometry detects decline. And the physician who reviews those results against the employee’s exposure history and job demands determines whether the decline is occupational, whether the exposure controls are adequate, and whether the employee needs medical removal before the damage becomes permanent.
Occucare International delivers NIOSH-certified pulmonary function testing for employers in Houston and across Texas – baseline, periodic, and exit spirometry performed by trained technicians using calibrated equipment that meets ATS/ERS quality standards, with every result reviewed by board-certified occupational medicine physicians who understand what a declining FEV1 means for a concrete cutter, a welder, an abatement worker, or a chemical process operator. Not software-generated interpretations. Physician clinical judgment applied to your employee’s lung function data in the context of their specific occupational exposure.
Board-Certified Physician Interpretation
OSHA Medical Surveillance Compliant
ATS/ERS Quality Standards
NIOSH-Certified Spirometry
Longitudinal Baseline-to-Exit Tracking
NIOSH-Approved Spirometry Course Certified Technicians
Clinic Hours
- Monday - Friday 7:30 AM - 4:30 PM CST
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Who Occucare Provides Pulmonary Function Testing To
Occucare delivers NIOSH-certified occupational spirometry programs to construction general contractors with silica, asbestos, and lead exposure across active project sites; industrial manufacturers running cotton dust, isocyanate, welding fume, and chemical sensitizer exposures; oil and gas operators with benzene and VOC exposure requiring integrated respirator and surveillance programs; abatement and remediation contractors operating under the most stringent OSHA medical surveillance standards; and government and DoD contractors whose surveillance documentation must satisfy both OSHA and contract-specific audit requirements. Across all of these segments, baseline, periodic, and exit spirometry is performed by NIOSH-certified technicians and reviewed by board-certified occupational medicine physicians operating out of Houston.
What Happens When Pulmonary Function Testing Is Missing, Inadequate, or Disconnected From Your Surveillance Program
Most employers with respiratory hazard exposure know that spirometry is required somewhere in their compliance obligations. But the gap between knowing the requirement exists and executing a physician-governed PFT program that actually detects occupational lung disease before it becomes permanent disability is where occupational illness claims, OSHA citations, and medical removal crises originate. If any of the following describes your current PFT infrastructure, your medical surveillance program has a clinical gap that a structured occupational health testing program is designed to close.
No Baseline Spirometry - And No Way to Prove Decline Is or Is Not Occupational
When an employee develops respiratory symptoms after years of silica, asbestos, or chemical exposure on your job sites, the first question in the workers’ compensation investigation, the OSHA enforcement action, and the personal injury lawsuit is: what did the employee’s lung function look like before they started working for you?
Without a baseline spirometry performed at the time of hire or assignment to the exposure, the employer cannot demonstrate that the employee’s current respiratory impairment is a pre-existing condition, a non-occupational cause, or the result of exposure at a previous employer. The absence of a baseline creates a presumption that the current employer’s exposure caused the disease – because there is no data to challenge it. A baseline spirometry costs minutes to perform. The occupational disease claims it prevents or defends costs orders of magnitude more.
Spirometry Performed by Untrained Technicians With Uncalibrated Equipment
A spirometry result is only as reliable as the technician who coaches the maneuver and the equipment that measures it. OSHA and NIOSH require that spirometry be performed by technicians who have completed a NIOSH-approved spirometry training course and that the spirometer be calibrated or verified daily with a 3-liter calibration syringe. ATS/ERS quality standards define the acceptability and reproducibility criteria that each test session must meet – three acceptable maneuvers with the two best FVC and FEV1 values within 150 mL of each other.
When spirometry is performed by a medical assistant with no NIOSH training, on a spirometer that has not been calibrated this month – much less today – the results are clinically unreliable. A false normal result misses genuine decline. A false abnormal result triggers unnecessary medical removal or specialist referral. And when OSHA reviews the spirometry records during an enforcement action, the first thing the compliance officer examines is the technician’s certification and the calibration log. If either is absent, every spirometry result in the program is procedurally compromised.
Software-Generated Interpretations With No Physician Review
Modern spirometers produce automated interpretations – “normal,” “mild obstruction,” “moderate restriction” – based on predicted values derived from reference equations for age, height, sex, and race/ethnicity. These automated interpretations are screening tools. They are not clinical diagnoses. They do not account for the employee’s specific occupational exposure history, their baseline spirometry values, the rate of decline between serial tests, the quality of the maneuver that produced the values, or the clinical significance of a borderline result in the context of ongoing silica or asbestos exposure.
An employee with an FEV1 that has declined 12% from their baseline over three years but remains within the “normal” range on the software’s reference equation has an occupationally significant decline that the automated interpretation will classify as normal. That employee needs physician review, exposure assessment, and potential workplace intervention. The software says they are fine. The occupational medicine physician says their lungs are deteriorating and the exposure needs to change before the damage becomes irreversible.
At Occucare, every spirometry result is reviewed by a board-certified occupational medicine physician – not auto-interpreted and filed. The physician evaluates the result against the employee’s individual baseline, their exposure history, the quality of the test maneuver, and the clinical trajectory of their lung function over time.
Periodic Testing Without Comparison to Baseline - Measuring Function Without Measuring Change
A single spirometry measurement tells you where an employee’s lung function is today. It does not tell you whether that function is declining. The clinical value of occupational spirometry is longitudinal – tracking the same employee’s FVC, FEV1, and FEV1/FVC ratio over years of exposure to detect the rate and pattern of decline that distinguishes occupational lung disease from normal aging.
When periodic spirometry is performed without comparison to the employee’s baseline, you are measuring lung function without measuring change. An FEV1 of 3.2 liters in a 45-year-old male might be normal – or it might represent a 20% decline from a baseline of 4.0 liters measured five years ago. Without the baseline comparison, the result is clinically uninterpretable in the occupational context. This is why OSHA substance-specific standards require baseline spirometry first and periodic spirometry thereafter – the baseline establishes the reference point that makes every subsequent measurement meaningful.
No Exit Spirometry - And No Protection Against Future Occupational Disease Claims
Exit spirometry is the most frequently omitted component of an employer’s PFT program — and the one that creates the most legal exposure when it is missing. When an employee leaves your company after years of silica, asbestos, or chemical exposure and you have no exit spirometry documenting their lung function at the time of separation, you have no evidence of what their respiratory status was when they left. If that former employee develops symptomatic occupational lung disease five years later and files a claim, the absence of exit spirometry means the employer cannot demonstrate that the employee’s lungs were functionally normal at separation, or that any decline occurred after they left your employment.
An exit spirometry takes 15 to 20 minutes. The occupational disease claim it defends can extend for years and cost the employer hundreds of thousands of dollars in medical benefits, disability payments, and legal fees. Exit spirometry is the most cost-effective occupational health investment an employer can make for every departing employee with a respiratory exposure history.
PFT Disconnected From Respirator Clearance and Medical Surveillance
When pulmonary function testing is performed by one vendor, respirator fit testing is performed by another, and medical surveillance is managed by a third, no single physician has a complete picture of the employee’s respiratory health. The PFT vendor reports the spirometry values. The fit testing vendor reports the fit factor. The surveillance vendor reports the examination findings. But nobody connects the declining FEV1 on the PFT to the respirator medical clearance determination, the substance-specific surveillance examination, or the employer’s exposure assessment.
At Occucare, pulmonary function testing is one component of an integrated respiratory health program. The physician reviewing the spirometry result is the same physician evaluating respirator medical clearance, reviewing medical surveillance findings, and connecting to your corporate medical direction framework. When a PFT shows decline, that decline is immediately factored into the respirator clearance decision, the surveillance follow-up, and the employer notification – not siloed in a separate vendor’s system where nobody with clinical authority connects the data points.
What Occupational Spirometry Is - And Why It Matters More Than Any Other Compliance Test for Employers With Respiratory Hazard Exposure
Occupational Pulmonary Function Testing (Spirometry) Defined
Occupational spirometry is the standardized measurement of forced vital capacity (FVC), forced expiratory volume in one second (FEV1), and the FEV1/FVC ratio, performed on employees exposed to workplace respiratory hazards as a component of Occupational Safety and Health Administration (OSHA)-mandated medical surveillance. It is performed at baseline, periodically, and at exit by National Institute for Occupational Safety and Health (NIOSH)-certified technicians using calibrated spirometers meeting American Thoracic Society (ATS) / European Respiratory Society (ERS) standards, with results interpreted by an occupational medicine physician.
What Spirometry Measures - The Clinical Parameters That Detect Occupational Lung Disease
Understanding what spirometry actually measures is essential for employers who need to interpret physician reports, communicate with their safety teams, and make informed decisions about exposure controls and medical removal.
Forced Vital Capacity (FVC)
The total volume of air an employee can forcefully exhale after a maximum inhalation. FVC measures lung volume - how much air the lungs can hold. A declining FVC over serial testing suggests a restrictive process - the lungs are losing volume, which is the pattern seen in silicosis, asbestosis, and other occupational pneumoconioses where inhaled particles scar the lung tissue and reduce its ability to expand.
Forced Expiratory Volume in One Second (FEV1)
The volume of air expelled in the first second of a forced exhalation. FEV1 measures airflow rate - how quickly air can move through the airways. A declining FEV1 suggests an obstructive process - the airways are narrowing, which is the pattern seen in occupational asthma (caused by isocyanate, flour dust, or chemical sensitizer exposure) and COPD exacerbated by workplace irritant exposure.
FEV1/FVC Ratio
The proportion of total lung capacity that can be exhaled in the first second. A reduced ratio (below 0.70 or below the lower limit of normal) with a preserved or elevated FVC indicates an obstructive pattern. A normal or elevated ratio with a reduced FVC indicates a restrictive pattern. A reduced ratio with a reduced FVC indicates a mixed pattern. The ratio is the primary differentiator between obstructive and restrictive lung disease - the two major categories of occupational respiratory impairment.
These three values – FVC, FEV1, and FEV1/FVC ratio – measured at baseline and tracked longitudinally over the employee’s exposure period, form the clinical foundation for early detection of occupational lung disease. A 15% decline in FEV1 from an individual’s baseline, even if the absolute value remains within the population’s predicted normal range, is a clinically significant finding that requires physician evaluation, exposure assessment, and potential intervention. This is why physician interpretation of spirometry – not software-generated automated reports – is the standard of care in occupational health.
The OSHA Standards That Mandate Employer Spirometry Programs
Spirometry is not a general wellness screening. It is mandated by specific OSHA substance-specific standards for employees exposed to specific regulated hazards. The primary standards requiring employer spirometry programs are:
Respirable Crystalline Silica - 29 CFR 1926.1153 (construction) / 1910.1053 (general industry)
Spirometry required within 30 days of initial assignment and at least every three years thereafter for employees exposed at or above the action level (25 µg/m³) for 30 or more days per year. The silica standard also requires chest X-ray and physician examination as part of the surveillance program.
Cadmium - 29 CFR 1910.1027
Spirometry required at baseline and annually for employees exposed at or above the action level. The cadmium standard includes biological monitoring (blood cadmium, urine cadmium, beta-2-microglobulin) and medical removal protection provisions.
Asbestos - 29 CFR 1926.1101 (construction) / 1910.1001 (general industry)
Spirometry required at baseline and annually for all employees exposed at or above the PEL (0.1 f/cc) or excursion limit. The asbestos standard also requires chest radiograph interpreted by a B-reader using ILO classification.
Cotton Dust - 29 CFR 1910.1043
Spirometry required at baseline and at least every six months for exposed employees. The cotton dust standard uses cross-shift spirometry (pre-shift and post-shift on the same day) to detect acute bronchoconstriction caused by cotton dust exposure - the early indicator of byssinosis.
Coal Dust - 30 CFR 90 (MSHA)
Spirometry required as part of the medical surveillance program for coal mine workers under MSHA jurisdiction. Detects coal workers’ pneumoconiosis and progressive massive fibrosis.
Respiratory Protection - 29 CFR 1910.134
Spirometry may be required as part of the medical evaluation for respirator use when flagged responses on the OSHA Appendix C questionnaire indicate potential pulmonary compromise that could affect the employee’s ability to safely wear a respirator.
Occucare’s PFT program is designed to satisfy every applicable standard simultaneously – so employers with employees exposed to multiple regulated substances receive one coordinated spirometry program that meets all of their surveillance obligations.
Occucare’s Pulmonary Function Testing Services - From Baseline Through Exit, With Physician Governance at Every Stage
01 - Baseline Spirometry
Every occupational spirometry program begins with a baseline – the measurement that establishes each employee’s normal lung function before or at the onset of respiratory hazard exposure. Without a baseline, every subsequent spirometry measurement is clinically unanchored – a number without a reference point.
Occucare’s baseline spirometry includes:
- Testing within the OSHA-mandated timeframe: The silica standard requires baseline spirometry within 30 days of initial assignment. The asbestos standard requires baseline before first exposure. Occucare schedules baseline testing to meet the applicable deadline for your specific regulatory requirement.
- Pre-test exposure history documentation: Before the baseline is performed, the technician documents the employee’s occupational exposure history, smoking history, respiratory symptoms, and any prior pulmonary diagnoses. This context is essential for the physician’s interpretation of the baseline values and for establishing the clinical foundation of the longitudinal record.
- ATS/ERS quality-compliant maneuvers: Three acceptable efforts with the two best FVC and FEV1 values within 150 mL of each other. The technician coaches the maneuver, evaluates quality in real time, and repeats efforts that do not meet acceptability criteria – up to a maximum of eight attempts to achieve three acceptable maneuvers.
- Physician interpretation: The baseline result is reviewed by Occucare’s board-certified occupational medicine physician against predicted values for the employee’s age, height, sex, and race/ethnicity. Any baseline abnormality is identified, documented, and communicated to the employer with clinical context and recommended follow-up.
- Secure longitudinal record initiation: The baseline result is stored as the reference point against which all future periodic and exit spirometry will be compared. Occucare maintains the complete longitudinal spirometry record for each employee throughout their exposure period.The cost of baseline spirometry per employee is measured in tens of dollars. The cost of an undefended occupational disease claim from an employee with no baseline on file routinely exceeds $250,000 in workers’ compensation benefits, medical monitoring, and legal defense – before any consideration of plaintiff settlements or jury awards in jurisdictions where the absence of a baseline shifts the presumption to the employer.
02 - Periodic Spirometry
Periodic spirometry is where occupational lung disease is detected – or missed. The comparison between current values and the employee’s individual baseline, performed at the interval mandated by the applicable OSHA standard, is the clinical mechanism that identifies decline before the employee develops symptoms.
Occucare’s periodic spirometry program includes:
- Testing at the frequency mandated by the applicable standard: Annually for asbestos and cadmium exposure. Every three years for silica exposure (with more frequent testing if previous results show decline). Every six months for cotton dust exposure. Occucare manages the testing schedule and sends proactive notifications before the testing interval expires.
- Longitudinal comparison against the employee’s individual baseline: Every periodic result is compared against the employee’s own baseline – not against population-based predicted values. A 10% decline in FEV1 from an individual’s baseline is clinically meaningful even if the absolute value remains within the “normal” range for their age and height. This is the comparison that software-generated reports do not make and that physician review is specifically designed to identify.
- Rate-of-decline analysis: For employees with three or more serial spirometry measurements, Occucare’s physicians analyze the rate of FEV1 decline over time. Normal age-related decline is approximately 20–30 mL per year. Decline exceeding 60 mL per year in an exposed worker suggests occupational causation and triggers enhanced surveillance, exposure assessment, and potential medical removal evaluation.
- Employer notification with clinical context: When periodic spirometry identifies clinically significant decline, Occucare’s physician communicates the finding to the employer’s safety team with specific context: the degree of decline, the clinical significance, the likely exposure relationship, and the recommended actions – which may include enhanced exposure controls, respiratory protection reassessment, additional diagnostic evaluation, or medical removal.
03 - Exit Spirometry
Exit spirometry is the final data point in the employee’s longitudinal pulmonary function record – and the most legally significant measurement in the entire program.
Occucare’s exit spirometry program includes:
- Testing at the time of separation from the exposed position: Whether the employee is leaving the company, transferring to a non-exposed role, or being medically removed from exposure, exit spirometry documents lung function at the point of departure.
- Comparison against baseline and longitudinal trend: The exit result is compared against the employee’s baseline and all intervening periodic results to determine whether clinically significant decline occurred during the employment period and, if so, the trajectory and magnitude of the decline.
- Physician summary report: Occucare’s physician produces a summary of the employee’s complete longitudinal spirometry record – baseline, periodic, and exit values with clinical interpretation – maintained in the employer’s compliance file as a defensible record of the employee’s respiratory health throughout their exposure period.
- Legal defensibility: An exit spirometry showing stable lung function at separation is the employer’s strongest defense against future occupational disease claims from former employees. An exit spirometry showing decline is the employer’s documentation that the condition was identified, communicated, and managed within the surveillance program – not ignored until the employee filed a claim. An exit spirometry takes 15 to 20 minutes and costs less than $100 per employee. The occupational disease claim it defends – particularly for asbestos, silica, and isocyanate-exposed workers whose disease may not manifest for 10 to 20 years after separation – routinely exceeds $400,000 in lifetime medical costs, disability benefits, and legal exposure. There is no occupational health investment with a higher defensive ROI than exit spirometry on every departing exposed worker.
04 - Cross-Shift Spirometry
For employers subject to the OSHA Cotton Dust Standard (29 CFR 1910.1043) or employers evaluating acute respiratory response to workplace irritant exposure, Occucare provides cross-shift spirometry – pre-shift and post-shift spirometry performed on the same workday to measure acute bronchoconstriction caused by occupational exposure.
A decline in FEV1 of 5% or greater from pre-shift to post-shift is the diagnostic indicator of acute airway reactivity – the earliest sign of byssinosis in cotton-exposed workers and of reactive airway disease in workers exposed to isocyanates, welding fumes, and other respiratory irritants. Cross-shift spirometry detects the acute response that standard periodic spirometry, performed outside the exposure window, may miss entirely.
05 - Bronchodilator Response Testing
When spirometry identifies an obstructive pattern – reduced FEV1 with a reduced FEV1/FVC ratio – bronchodilator response testing determines whether the obstruction is reversible (characteristic of asthma, including occupational asthma) or fixed (characteristic of COPD and advanced occupational lung disease).
Occucare performs post-bronchodilator spirometry when indicated by the pre-bronchodilator result. The employee inhales a short-acting bronchodilator (typically albuterol) and spirometry is repeated 15 to 20 minutes later. An improvement in FEV1 of 12% or greater and 200 mL or greater from the pre-bronchodilator value indicates significant reversibility – supporting a diagnosis of asthma and guiding the physician’s determination of whether the asthma is occupationally caused, occupationally aggravated, or unrelated to workplace exposure.
06 - Onsite PFT for Large Workforces and Active Projects
For construction projects, manufacturing facilities, and industrial operations with large numbers of exposed workers, Occucare deploys spirometry testing teams directly to your job site or facility.
- Calibrated portable spirometers: Occucare deploys spirometers that meet ATS/ERS performance standards, calibrated with a 3-liter syringe daily before testing begins, with calibration verification documented for each testing session.
- NIOSH-certified technicians: Every spirometry maneuver is coached and quality-checked by technicians who have completed a NIOSH-approved spirometry training course. Technician certification status is maintained and documented.
- Batch processing for project mobilizations: Testing large crews during scheduled mobilization events, organized around your shift schedules to minimize the productivity impact of pulling workers for testing.
- Combined with respirator fit testing and surveillance: For workers who need PFT, respirator fit testing, and medical surveillance examinations, Occucare coordinates all three in the same onsite session – reducing the number of times each worker is removed from productive work for compliance testing.
Are your spirometry records defensible if an OSHA inspector requests them tomorrow?
Request a Surveillance Compliance Gap Assessment — our occupational medicine team reviews your current spirometry program against the OSHA substance-specific standards applicable to your workforce, evaluates technician certification status and equipment calibration documentation, and identifies the gaps in baseline, periodic, and exit testing coverage before they become OSHA citations or occupational disease claims.
Retail Spirometry vs. Occucare’s Physician-Governed Occupational PFT Program
| Capability | Retail / Non-Occupational Spirometry | Occucare Occupational PFT Program |
| Result interpretation | Software-generated automated report | Board-certified occ med physician clinical review |
| Baseline comparison | Compared to population predicted values only | Compared to employee’s own baseline + population values |
| Rate-of-decline analysis | Not performed | Longitudinal trend analysis on serial results |
| Technician certification | Variable – may not be NIOSH-certified | NIOSH-approved spirometry course certified |
| Equipment calibration | Periodic – documentation may be absent | Daily calibration verification, documented per session |
| Quality criteria | Basic acceptability check | Full ATS/ERS acceptability and reproducibility criteria |
| Exposure context | None – result in isolation | Interpreted in context of specific occupational exposure |
| Employer notification | Result sent to employee or patient portal | Findings communicated to employer safety team with action items |
| Integration with fit testing / surveillance | None – separate vendor | Coordinated with respirator clearance and surveillance |
| Integration with injury management and return-to-work | None – PFT vendor data does not flow into injury or RTW decisions | PFT findings flow into the same physician-governed framework managing injury cases, fitness-for-duty, and return-to-work determinations |
| Exit spirometry | Not offered or tracked | Standard component with longitudinal summary report |
Occupational Lung Diseases That Spirometry Detects Before Symptoms Appear
The clinical value of occupational spirometry is early detection of diseases that are irreversible once established. Each of the following conditions develops over years of occupational exposure and produces measurable spirometric changes before the employee experiences symptoms. By the time a worker with silicosis develops exertional dyspnea, the lung fibrosis is advanced and permanent. Spirometry detects the FVC decline years earlier – when exposure modification and medical intervention can still slow or prevent further damage.
Silicosis
Caused by inhalation of respirable crystalline silica from concrete cutting, grinding, drilling, sandblasting, masonry, and stone fabrication. Silicosis produces a restrictive pattern on spirometry – declining FVC with a preserved or mildly reduced FEV1/FVC ratio – as silica particles cause progressive fibrosis that reduces lung tissue compliance and volume. There is no cure for silicosis. Early detection through serial spirometry enables exposure reduction, medical monitoring, and prevention of progressive massive fibrosis.
Asbestosis
Caused by inhalation of asbestos fibers during demolition, renovation, insulation removal, and shipyard work. Like silicosis, asbestosis produces a restrictive spirometric pattern as asbestos fibers cause diffuse interstitial fibrosis. Asbestos exposure also carries the risk of mesothelioma – a fatal malignancy of the pleural lining – which spirometry does not detect but which the comprehensive asbestos surveillance program (including chest radiograph with B-reader interpretation) is designed to identify.
Occupational Asthma
Caused by sensitization to workplace chemicals including isocyanates (spray painting, foam manufacturing), flour dust (baking, food processing), wood dust, formaldehyde, and latex. Occupational asthma produces an obstructive pattern on spirometry – declining FEV1 with a reduced FEV1/FVC ratio. Cross-shift spirometry showing acute FEV1 decline during or after exposure is diagnostic. Bronchodilator response testing confirming reversibility supports the asthma diagnosis. Once sensitization is established, even low-level exposure triggers bronchospasm – making early detection and exposure removal the only effective intervention.
Byssinosis
Caused by inhalation of cotton dust in textile manufacturing, cotton processing, and hemp/flax handling. Byssinosis produces an obstructive pattern that characteristically worsens at the beginning of the work week (“Monday morning asthma”). Cross-shift spirometry showing acute FEV1 decline on the first day after a break from exposure is the diagnostic hallmark. OSHA’s Cotton Dust Standard requires spirometry every six months specifically to detect byssinosis before it progresses to chronic, irreversible airflow limitation.
Coal Workers’ Pneumoconiosis
Caused by inhalation of coal mine dust. CWP produces a restrictive or mixed pattern on spirometry as coal dust accumulates in the lungs and causes progressive fibrosis. Advanced CWP (progressive massive fibrosis) produces severe, irreversible restriction. MSHA-mandated spirometry and chest radiograph surveillance detects CWP at the simple stage when exposure modification can prevent progression.
The Financial Case for Physician-Governed Occupational Spirometry
Medical Removal Cost Management
Several OSHA substance-specific standards include medical removal protection (MRP) provisions that require employers to remove employees from exposure and maintain their earnings when surveillance findings indicate medical necessity. An employer with no spirometry program discovers the need for medical removal when the employee develops symptomatic disease - at which point the removal is urgent, unplanned, and potentially permanent. An employer with a physician-governed spirometry program identifies early decline, implements exposure controls, and manages the situation before medical removal becomes necessary - or, when removal is required, executes it proactively with planned replacement rather than emergency operational disruption.
OSHA Citation Exposure
Failure to provide required medical surveillance spirometry is a citable violation under every substance-specific OSHA standard that mandates it. For silica, the citation is issued under 29 CFR 1926.1153(h) for construction and 1910.1053(i) for general industry. At current OSHA penalty rates exceeding $16,000 per serious violation, an employer with 20 silica-exposed workers and no spirometry program faces potential citation exposure exceeding $320,000. The cost of the spirometry program for those 20 workers is a fraction of a single citation.
Occupational Disease Liability
Occupational lung disease claims are among the most expensive in workers’ compensation. Silicosis, asbestosis, and occupational asthma produce permanent disability with lifelong medical monitoring and treatment costs. A well-documented spirometry program - baseline, periodic, and exit - with physician interpretation and longitudinal trend analysis either detects decline early enough to prevent advanced disease through exposure modification or documents the employer’s compliance with surveillance requirements in a manner that provides legal defense against the claim.
Why Occucare - Occupational Spirometry as a Clinical Surveillance Function, Not a Checkbox Test
NIOSH-certified technicians performing every test
Technicians trained through NIOSH-approved spirometry courses. Calibration verification documented daily. ATS/ERS quality criteria enforced on every maneuver.
Board-certified occupational medicine physician review of every result
Not software interpretation. Not technician sign-off. Physician clinical judgment applied in the context of the employee’s individual baseline, exposure history, and occupational demands.
Integration with respirator fit testing and medical surveillance
The physician reviewing PFT results is the same physician governing respirator medical clearance and OSHA substance-specific surveillance. Declining PFT values immediately inform respirator clearance decisions, surveillance follow-up, and employer notification.
Longitudinal tracking from baseline through exit
Every employee’s spirometry record maintained as a continuous dataset - enabling rate-of-decline analysis, individual baseline comparison, and complete longitudinal documentation for compliance and legal defense.
Onsite deployment for large workforces
Calibrated spirometers, NIOSH-certified technicians, and batch processing capability deployed to your construction site, industrial facility, or manufacturing plant.
Proactive testing schedule management
Testing intervals tracked per employee per applicable OSHA standard. Renewal notifications sent before compliance lapses. Your safety team never discovers an expired spirometry requirement during an OSHA inspection.
Employer-formatted reporting
Physician findings communicated to your safety team with clinical context and recommended actions - not a clinical report formatted for a patient chart. Results that require employer action are flagged and communicated with specificity.
Frequently Asked Questions - Pulmonary Function Testing for Employers
OSHA requires spirometry under the following substance-specific standards: respirable crystalline silica (29 CFR 1926.1153 for construction, 1910.1053 for general industry), asbestos (29 CFR 1926.1101 for construction, 1910.1001 for general industry), cadmium (29 CFR 1910.1027), cotton dust (29 CFR 1910.1043), and coal dust (under MSHA 30 CFR Part 90). Additionally, spirometry may be required as part of the medical evaluation for respirator use under 29 CFR 1910.134 when the physician identifies pulmonary risk factors during the Appendix C questionnaire review. Employers should review the specific medical surveillance provisions of every substance-specific standard applicable to their workforce to determine which employees require spirometry and at what interval.
OccuCare's onboarding for occupational PFT programs is designed to absorb your existing workforce without losing the longitudinal record that makes spirometry clinically meaningful. Our team reviews your current spirometry records, imports prior baseline and periodic results into our longitudinal tracking system as historical reference points for each employee, and schedules the next periodic test at the interval mandated by the applicable OSHA standard. Employees with existing baselines are not retested unnecessarily - their prior records become the comparison points for future periodic and exit spirometry. For employers transitioning from vendors whose records are incomplete or whose technician certification cannot be verified, OccuCare's physicians evaluate which prior results are clinically usable and which need to be re-baselined under NIOSH-certified, ATS/ERS-compliant conditions to establish a defensible record going forward.
When periodic spirometry identifies clinically significant decline from the employee’s baseline, Occucare’s occupational medicine physician conducts a clinical evaluation of the finding. The evaluation considers the magnitude of decline, the rate of decline over serial measurements, the employee’s specific occupational exposure history, smoking history, and any non-occupational respiratory conditions. Based on this evaluation, the physician may recommend enhanced surveillance (more frequent spirometry), additional diagnostic evaluation (chest imaging, DLCO measurement, specialist referral), exposure modification (engineering controls, respiratory protection reassessment, job reassignment), or medical removal from exposure when clinically indicated under the applicable OSHA standard. All findings and recommendations are communicated to the employer’s safety team with clinical context and documented in the medical surveillance record.
Yes. Occucare deploys onsite spirometry testing for employers with large workforces or active construction projects. Onsite testing includes calibrated portable spirometers meeting ATS/ERS performance standards, NIOSH-certified technicians, daily calibration verification, and complete documentation. For construction project mobilizations, Occucare can process batch spirometry for large crews organized around your shift schedule. Onsite spirometry is frequently combined with respirator fit testing and medical surveillance examinations in the same deployment session.
Clinical spirometry at a primary care office is a diagnostic test ordered for a patient presenting with respiratory symptoms. Occupational spirometry is a surveillance tool performed on asymptomatic employees to detect the earliest signs of occupational lung disease before symptoms develop. The critical differences are: occupational spirometry is compared against the employee’s individual baseline (not just population predicted values), it is interpreted by a physician with occupational medicine training who understands the exposure context, it follows ATS/ERS quality standards with NIOSH-certified technicians, and results are communicated to the employer with recommended workplace actions. A primary care spirometry that shows “normal” based on predicted values may mask a 15% decline from the individual’s baseline that an occupational medicine physician would identify as clinically significant and requiring intervention.
Occucare manages the spirometry testing calendar as an ongoing compliance function. Each employee’s testing interval is tracked based on the applicable OSHA standard - annually for asbestos and cadmium exposure, every three years for silica exposure, every six months for cotton dust exposure. Renewal notifications are sent to your safety team before testing intervals expire. New hires are onboarded into the testing program at the time of assignment to an exposed position. Employees transferring out of exposed roles or leaving the company are scheduled for exit spirometry. The system is designed to ensure your compliance status is current at all times - not reconstructed when an OSHA investigator requests surveillance records.
At Occucare, PFT, respirator fit testing, and OSHA substance-specific medical surveillance are components of a single integrated respiratory health program governed by the same occupational medicine physicians. When a spirometry result shows FVC decline in a silica-exposed worker, that finding is immediately connected to the employee’s respirator medical clearance evaluation - because the physician reviewing both is the same physician. When a surveillance examination identifies an exposure-related chest radiograph finding, the spirometry data is available in the same clinical record for correlation. This integration eliminates the clinical gap that exists when PFT, fit testing, and surveillance are managed by separate vendors with no shared physician oversight or clinical data connection.
Explore Related Occucare Services
Workplace Compliance Testing Hub
The complete employer compliance testing program: drug testing, respirator fit, PFT, cognitive screening, audiometric testing, and surveillance monitoring.
Respirator Fit Testing
OSHA 29 CFR 1910.134 qualitative and quantitative fit testing. Often paired with PFT for workers in respiratory hazard environments.
Surveillance Screenings & Monitoring
Complete OSHA substance-specific medical surveillance programs including spirometry, audiometry, blood monitoring, and physician examination.
OSHA Medical Surveillance
Comprehensive employer surveillance program management for silica, asbestos, lead, noise, hexavalent chromium, and other regulated exposures.
Corporate Medical Direction
The physician governance framework overseeing your compliance testing, surveillance, and respiratory protection programs.
Occupational Health Clinic Houston
Walk-in and scheduled PFT, compliance testing, and employer clinic services.
Detect Lung Function Decline Before It Becomes Irreversible Occupational Disease
Your employee’s lungs do not send warning signs until the damage is advanced and permanent. Occupational spirometry is the clinical tool that detects the decline before it becomes disease — when exposure modification, respiratory protection reassessment, and medical intervention can still change the outcome. Occucare International delivers NIOSH-certified spirometry with board-certified physician interpretation, longitudinal baseline-to-exit tracking, and integration with your respirator and surveillance programs – at our Houston clinic or onsite at your construction site, manufacturing facility, or industrial operation.