1. Why Client Screening Is the First Control in an HBOT Service
Every hyperbaric oxygen therapy service is built on equipment decisions long before it is built on clinical ones. Buyers compare vessel construction, pressure range, oxygen delivery, noise, delivery terms and after-sales coverage. Yet the control that determines whether a chamber programme survives its first year is not the vessel at all — it is the screening workflow that decides who is allowed inside it.
Screening is the front door of mild hyperbaric oxygen therapy. It is where an operator converts an enquiry into an admissible candidate, or declines the booking in writing. It is also where most insurance claims, complaints and regulatory questions begin. A client who was never asked about recent thoracic surgery, or whose ear equalisation was never assessed, becomes an incident that no amount of engineering can undo.
For clinics, wellness centres and distributors evaluating a chamber programme, screening deserves the same scrutiny as the specification sheet. A hard-shell chamber built from aviation-grade steel and fully welded — the construction standard across the AURA One, NEPTUNE Flow, LUMINA One, TITAN Duo and POLARIS Duo range — manages the physical risks of pressurisation. It does not decide whether a given person should be pressurised on a given day. That decision belongs to a documented, repeatable, auditable human process.
This article describes that process as an operating system: what screening has to catch, what an intake package contains, how a contraindication matrix is structured, how same-day checks work, who holds decision rights, what records must exist, and how the whole thing is measured. It complements the operational runbooks in our staff training and operations SOP guide and the engineering controls in our safety and emergency response framework.
What screening protects
| Protected interest | How screening protects it | What failure looks like |
|---|---|---|
| Client safety | Identifies conditions that make pressurisation unsafe | Adverse event during or after a session |
| Operator licence | Produces evidence of due diligence | Regulator finds undocumented decisions |
| Insurer position | Creates a consistent, defensible record | Claim contested for lack of consent |
| Staff confidence | Gives operators a clear yes/no rule | Operators improvising under client pressure |
| Equipment uptime | Filters out bookings that would be aborted | Wasted session slots and refund disputes |
| Brand reputation | Declines inappropriate enquiries politely | Public complaint about an unsuitable booking |
Screening vs. the other operational controls
| Control | Question it answers | Where it lives |
|---|---|---|
| Screening | Should this person be pressurised today? | This article |
| Engineering controls | Can the vessel be pressurised safely? | Safety and emergency response |
| Staff competence | Is the operator trained to run this? | Staff training and operations SOP |
| Hygiene | Is the vessel clean between occupants? | Chamber cleaning and infection control |
| Promotion | Was the benefit described lawfully? | Marketing claims compliance |
2. What an HBOT Screening Programme Has to Catch
A screening programme is not a questionnaire. It is a filter with defined failure modes. Before writing forms, an operator should list precisely what the filter must intercept, because each failure mode needs its own question, its own evidence and its own escalation route.
The first category is absolute bar: a condition that makes pressurisation unacceptable until resolved. Untreated pneumothorax is the widely recognised absolute contraindication to hyperbaric exposure, and every screening form should surface it unambiguously. The second category is relative: a condition that changes the risk calculation and requires clinician judgement, such as recent ear or sinus surgery, active upper respiratory infection, or poorly controlled respiratory disease. The third is operational: nothing clinically disqualifying, but something that makes the session impractical — an inability to equalise, claustrophobia severe enough to abort, or a client who cannot communicate discomfort.
Mild hyperbaric systems work at modest pressures — 1.1 to 1.7 atm across the range, with the POLARIS Duo reaching 1.75 atm — and are pressurised with air while the occupant breathes oxygen through a mask or hood (AURA One delivers at least 80% oxygen at the mask, the remaining models at least 90%). Lower pressure does not remove the need for screening; it changes what screening is looking for. The dominant risks at these pressures relate to enclosed gas spaces and pressure equalisation rather than to oxygen toxicity, so the ear, sinus, dental and thoracic questions carry the most weight.
Three failure modes and their evidence requirements
| Failure mode | Typical trigger | Evidence needed to clear |
|---|---|---|
| Absolute bar | Untreated pneumothorax, certain implanted devices | Written clinician clearance; [TO CONFIRM] which devices require it locally |
| Relative risk | Recent ENT surgery, active infection, pregnancy | Clinician review with dated note |
| Operational impracticality | Cannot equalise, severe claustrophobia, no escort | Observed trial or documented accommodation plan |
Screening stages and who performs them
| Stage | Performed by | Depth of check | Typical outcome |
|---|---|---|---|
| Enquiry | Front desk or sales | Red-flag questions only | Book, defer or decline |
| Intake | Operator with client | Full history and consent | Cleared or referred |
| Same day | Operator | Interval change check | Proceed or hold |
| In session | Operator | Observation and abort criteria | Complete or abort |
Risk category mapped to action
| Category | Decision owner | Typical outcome | Documented as |
|---|---|---|---|
| Absolute bar present | Responsible clinician | Decline or defer until resolved | Decline letter with reason code |
| Relative risk present | Clinician after review | Proceed with modified protocol | Amendment note on care plan |
| Operational concern | Operator with supervisor | Proceed with accommodation or reschedule | Session note |
| No concern | Operator per protocol | Proceed | Completed screening form |
3. The Intake Package: History, Medication and Consent
Intake is where screening becomes evidence. A verbal conversation that ends in “seems fine” is worthless in a complaint file. An intake package produces three artefacts: a structured history, a medication and device review, and a signed consent that names the risks in plain language.
The structured history should be short enough to complete reliably and specific enough to be useful. Ask about thoracic and pulmonary history, ear and sinus surgery, recent infection, pregnancy status, implanted devices, prior hyperbaric exposure and any previous difficulty equalising. Ask about smoking and respiratory conditions, because they shape the relative-risk conversation. Ask whether the client can signal discomfort and whether they have an escort for the first session.
The medication and device review is the part most operators under-build. Implanted pumps, infusion ports and certain electronic devices behave differently under pressure, and the screening form should capture them explicitly rather than under a general “any implants?” line. Consent, meanwhile, should be specific: what the session involves, what the recognised risks are, what the client should do if discomfort occurs, and what happens if the session is aborted. Consent language must match what the marketing said, which is why our marketing claims compliance guide belongs in the same document set.
Minimum viable intake package
| Artefact | Contents | Owner | Retention |
|---|---|---|---|
| Structured history form | Thoracic, ENT, respiratory, pregnancy, device, prior HBOT | Client plus operator review | [TO CONFIRM] per local rule |
| Medication and device list | Current medicines, implants, infusion devices | Client self-report verified by operator | [TO CONFIRM] |
| Consent document | Procedure, risks, abort conditions, escalation | Client signature | [TO CONFIRM] |
| Clinician review note | Where relative risk is present | Responsible clinician | [TO CONFIRM] |
| Session record | Pressures, times, any discomfort reported | Operator | [TO CONFIRM] |
Intake questions that carry the most weight
| Question theme | Why it matters | Follow-up if positive |
|---|---|---|
| Untreated pneumothorax or recent thoracic procedure | Absolute bar to pressurisation | Decline pending clinician clearance |
| Ear or sinus surgery, active congestion | Equalisation failure is the commonest abort cause | Clinician review, equalisation coaching |
| Implanted or infusion devices | Behaviour under pressure varies | Manufacturer and clinician guidance |
| Pregnancy | Requires clinician judgement | Documented risk-benefit note |
| Prior HBOT experience and tolerance | Predicts first-session comfort | Adjust compression rate within protocol |
| Ability to communicate discomfort | Determines monitoring approach | Escort, intercom check interval |
4. The Contraindication Matrix: Absolute, Relative and Operational Limits
Operators need a single reference that converts a condition into an action without improvisation. That reference is the contraindication matrix: a table of conditions, each mapped to a category, a decision owner and a required clearance. It should be reviewed annually and after any incident.
Structure the matrix in three tiers. Tier one is the absolute list — untreated pneumothorax belongs here, and the form must be written so that a positive answer stops the process rather than starting a debate. Tier two is the relative list, where the default is “refer to clinician” rather than “decline”. Tier three is operational: conditions that do not require a clinician but do require an accommodation, such as a client who needs an escort, extra time to equalise, or a slower compression profile.
The matrix must also state what is out of scope. A wellness operator using a CE-marked, ISO 13485-certified mild hyperbaric system is not running a hospital-based emergency service, and the matrix should say so plainly. It should also carry the compliance boundary: our chambers are CE marked and manufactured under ISO 13485, and we make no claim of FDA clearance. Screening documents should reflect the same boundary, so that no client is led to believe a session is an approved treatment for a diagnosed condition.
Matrix structure: how to read it
| Field | Purpose | Example entry |
|---|---|---|
| Condition | The thing being screened for | Untreated pneumothorax |
| Tier | Absolute / relative / operational | Absolute |
| Default action | What happens on a positive answer | Do not pressurise |
| Decision owner | Who can override | Responsible clinician only |
| Clearance required | Evidence to proceed | Dated clinician note |
| Review trigger | When the entry is revisited | Annual or post-incident |
Illustrative tier assignment (to be completed with your clinician)
| Condition example | Suggested tier | Action on positive answer | Note |
|---|---|---|---|
| Untreated pneumothorax | Absolute | Decline pending clearance | Widely recognised absolute contraindication |
| Recent thoracic surgery | Relative | Clinician review | Imaging report may be required |
| Active upper respiratory infection | Relative | Defer until resolved | Equalisation risk |
| Severe uncontrolled respiratory disease | Relative | Clinician review | [TO CONFIRM] local thresholds |
| Pregnancy | Relative | Documented risk-benefit | [TO CONFIRM] policy |
| Implanted electronic device | Relative | Manufacturer guidance | Device-specific |
| Inability to equalise after coaching | Operational | Reschedule or abort | Observed, not self-reported |
| Severe claustrophobia | Operational | Accommodation plan or decline | Trial compression may inform |
5. Ear, Sinus and Pressure Equalisation Pre-Clearance
At mild hyperbaric pressures, equalisation is the practical gatekeeper. Most aborted first sessions are not emergencies; they are clients who cannot clear their ears. Screening that predicts this — and coaching that prevents it — protects both the client experience and the schedule.
Pre-clearance starts with history: prior ear surgery, current congestion, recent flying or diving, and any previous difficulty. It continues with observation: a client who understands the equalisation manoeuvres before the door closes is far likelier to complete the session. Compression across the range takes 5 to 25 minutes depending on model and protocol, and that window is when coaching matters most. AURA One operates at no more than 50 dB, which helps an operator talk a first-time client through the manoeuvre without competing with noise.
Equalisation screening should produce a simple outcome: cleared, cleared with coaching, or deferred. Deferral is not a failure. A client who is sent home with congestion and rebooked three days later is a better commercial outcome than a client whose session is aborted at depth and who then asks for a refund.
Equalisation risk factors and pre-clearance actions
| Risk factor | Screened how | Pre-clearance action |
|---|---|---|
| Active congestion or infection | History plus observation | Defer until resolved |
| Recent ENT surgery | History | Clinician review |
| Recent flying or diving | History | Observe for residual discomfort |
| Prior difficulty in a chamber | Prior exposure record | Schedule slower compression within protocol |
| First session ever | Flag on booking | Extended briefing before compression |
Coaching checklist before the door closes
| Step | What the operator does | Pass criterion |
|---|---|---|
| Explain the sensation | Describe pressure change in plain terms | Client restates it correctly |
| Demonstrate equalisation | Show the manoeuvre | Client demonstrates it |
| Agree a stop signal | Hand signal or intercom word | Signal agreed and repeated |
| Set expectations on abort | Explain that aborting is normal | Client acknowledges |
| Confirm comfort in the vessel | Seat, visibility, intercom check | No unresolved concern |
6. Same-Day Screening: The Point-of-Care Check Before Every Session
A client cleared at intake is not cleared forever. Same-day screening asks whether anything has changed since the intake was signed: a new cold, a new medication, a poor night, a recent flight. This is a short check, but it is the one that catches most last-minute problems, and it must be repeated every session rather than assumed.
Design the check to take minutes and to end in a binary: proceed, or hold. Include a brief symptom review, a confirmation that nothing in the history has changed, a check that the client can equalise today, and confirmation that consent is still valid. Where a client attends repeatedly, the check should also track cumulative observations — recurring ear discomfort across sessions is a trend, and trends belong to the clinician, not the operator.
Same-day screening is also where hygiene intersects with clinical process. A client who arrives with an infectious symptom should be rescheduled, which links directly to the turnover and exclusion rules in our chamber cleaning and infection control protocol. The two procedures should reference each other so staff do not have to guess which one applies.
Same-day check: items and thresholds
| Item | Question | Hold trigger |
|---|---|---|
| Interval history | Anything changed since intake? | New thoracic, ENT or respiratory issue |
| Symptoms today | Congestion, ear pain, fever? | Any new symptom |
| Medication change | New prescription or device? | Requires review |
| Equalisation today | Can you clear now? | Failure after coaching |
| Consent validity | Still signed and understood? | Expired or unclear |
| Escort available | Required and present? | Not present for first session |
Proceed vs. hold decision table
| Situation | Decision | Rationale | Record |
|---|---|---|---|
| No change, equalises well | Proceed | Within cleared parameters | Session note |
| Mild congestion, equalises | Clinician view if policy requires | Documented threshold | Amendment note |
| Cannot equalise after coaching | Hold and rebook | Abort risk high | Hold record |
| New respiratory infection | Hold | Clinical plus hygiene reason | Hold record |
| Consent expired | Renew before proceeding | Legal requirement | New consent |
7. Decision Rights, Escalation and Clinical Governance
A screening programme fails when nobody knows who is allowed to say no. Governance is the part that makes the matrix real: named roles, named authorities and a defined escalation path. It should be written down, signed, and rehearsed in the same drills that cover fire and oxygen safety.
At minimum, three roles should be distinguishable. The operator collects the screening data and runs the protocol. A supervisor or lead operator can hold a session for operational reasons. A responsible clinician holds authority over relative and absolute risk, including any decision to proceed against a positive finding. The matrix should state which role can override which tier, and the record should show who decided.
Escalation should be time-boxed. A client with a positive relative finding should know within a defined period whether the session can proceed, who is reviewing it, and what happens if the answer is no. Where chains of sites are involved, governance must be identical at every location so that a client screened at one branch is screened the same way at another — a standardisation problem covered in our multi-site fleet scaling playbook.
Governance roles and authority
| Role | Can decide | Cannot decide | Escalates to |
|---|---|---|---|
| Chamber operator | Proceed when screening is clear | Proceed on a positive relative finding | Supervisor or clinician |
| Lead operator or supervisor | Hold for operational reasons | Clear a relative risk | Responsible clinician |
| Responsible clinician | Clear or decline any risk tier | Delegate without written scope | Medical director if applicable |
| Site owner or manager | Policy, staffing, record retention | Clinical decisions | Insurer or regulator as required |
Escalation path and timing
| Trigger | First contact | Target response | Outcome recorded as |
|---|---|---|---|
| Positive relative finding | Responsible clinician | [TO CONFIRM] hours | Review note |
| Absolute finding suspected | Stop process immediately | Immediate | Decline record |
| Session aborted for discomfort | Supervisor plus clinician if persistent | Same day | Incident note |
| Repeat equalisation failure | Clinician review | [TO CONFIRM] sessions | Protocol amendment |
| Screening form incomplete | Operator | Before compression | Form rejected |
8. Screening Records, Retention and the Audit Trail
Records are the deliverable of screening. When an insurer, regulator or plaintiff asks what happened, the answer is a file: the intake, the review note, the consent, the same-day checks and the session log. A programme that performs good screening but cannot produce the file has the same exposure as one that did not screen at all.
Design records for retrieval, not just storage. Each document should carry the client identifier, date, version of the form used, the name and role of the person completing it, and the decision reached. Where a decision was made against a positive finding, the rationale must be visible. Where a session was held or aborted, the reason code should be consistent across the site so that trends can be counted.
Retention periods, privacy obligations and access rights vary by jurisdiction and should be set with local counsel. Our own commercial documentation follows the same discipline — CE and ISO 13485 certification files, shipment terms under FOB, CIF or DDP, payment by T/T or LC, and post-installation support delivered by global after-sales and remote technical service. Buyers requesting screening templates and document sets alongside a chamber order can reach the team through the HyperbaricO2Care contact page.
Record set and required fields
| Record | Required fields | Why it matters |
|---|---|---|
| Intake history | Client ID, date, form version, completer name and role | Proves what was asked |
| Clinician review | Dated note, decision, reviewer identity | Supports a discretionary decision |
| Consent | Version, signature date, risks named | Defends the consent position |
| Same-day check | Session ID, changes, decision | Shows the check was repeated |
| Session log | Pressure, times, discomfort, abort reason | Links outcome to process |
| Hold or decline | Reason code, date, communicator | Closes the loop with the client |
Access rights per record type
| Record | Who may view | Who may amend | Amendment rule |
|---|---|---|---|
| Intake history | Operator, clinician, auditor | Operator before session | Amendments dated and named |
| Clinician note | Clinician, auditor | Author of the note only | Superseded, never overwritten |
| Consent | Operator, auditor | Not amendable | New version re-signed |
| Session log | Operator, supervisor | Operator during shift | Corrections appended |
Audit readiness self-check
| Question | Evidence to produce | If missing |
|---|---|---|
| Was this client screened? | Dated intake form | Gap in process |
| Was the form current? | Version number on form | Unknown questions were asked |
| Who decided to proceed? | Named decision maker | Accountability gap |
| Was relative risk reviewed? | Clinician note | Unsupported discretion |
| Was consent current? | Signed and dated version | Consent exposure |
| Was the decision consistent? | Comparison with similar cases | Inconsistency risk |
9. Measuring the Screening Programme
A screening workflow that is never measured drifts. Operators improvise, forms go stale, and the matrix stops matching reality. A handful of simple metrics keeps the programme honest and gives management a reason to invest in it.
Track process metrics first: what share of enquiries are declined or deferred at intake, how many same-day holds occur, and how often a session is aborted for a screening-related reason. Then track quality metrics: how often a deferred client returns, whether declines are communicated within the target period, and whether record completeness passes internal audit. Finally, track outcome signals: complaints referencing suitability, and any incident in which a screening question should have caught the issue.
Metrics only change behaviour if someone reviews them. Assign a monthly review, keep the numbers on one page, and require an action item whenever a threshold is breached. Distributors supporting multiple operators should build the same review into their service package, because a reseller who can show an auditable screening programme is selling more than a vessel.
Screening metrics worth reviewing monthly
| Metric | What it reveals | Review action if drifting |
|---|---|---|
| Intake decline or deferral rate | Whether the front door is working | Recalibrate enquiry qualification |
| Same-day hold rate | Whether interval change is being caught | Tighten the same-day check |
| Screening-related abort rate | Whether coaching is effective | Revise pre-clearance briefing |
| Record completeness score | Audit readiness | Retrain on documentation |
| Decline communication time | Client experience and governance | Fix escalation timing |
| Suitability-related complaints | Whether screening missed something | Post-incident matrix review |
Common drift patterns and corrections
| Drift pattern | Symptom | Correction |
|---|---|---|
| Form becomes perfunctory | Same answers, no follow-ups | Re-brief and add version control |
| Operators over-rule the matrix | Sessions proceeding on positives | Restate decision rights |
| Consent not renewed | Expired signatures | Booking-system block |
| Holds not recorded | Missing reason codes | Mandatory field |
| Matrix not updated | No annual review date | Calendar owner assigned |
10. Conclusion: Screening as a Buyable, Auditable System
Screening is the least visible part of a hyperbaric oxygen therapy service and the one most likely to define its risk profile. Equipment choices determine what a chamber can do; the screening workflow determines what it should do with a particular person on a particular day. Buyers who evaluate vessels thoroughly and screening cursorily end up with a strong asset and a weak process around it.
The practical takeaway is that screening can be specified like equipment. Define what it must catch, structure the intake package, build a tiered contraindication matrix with untreated pneumothorax as an absolute bar, pre-clear equalisation, repeat a short check on the day, assign decision rights, keep records that can be retrieved, and review a small set of metrics monthly. Each element is a document, a role and a metric — not an opinion.
HyperbaricO2Care supplies mild hyperbaric oxygen chambers to clinics, wellness centres and distributors on CE and ISO 13485 certified manufacturing, with OEM and ODM support, FOB, CIF and DDP shipping, T/T and LC payment, and global after-sales with remote technical support. The five-model range — AURA One, NEPTUNE Flow, LUMINA One, TITAN Duo and POLARIS Duo — is built as hard-shell, fully welded vessels at 1.1 to 1.7 atm (POLARIS Duo to 1.75 atm), with air pressurisation and mask or hood oxygen delivery, compression in 5 to 25 minutes, triple pressure release combining mechanical, electromagnetic and manual paths, and a 4G emergency call function. We make no claim of FDA clearance. Teams building out their operational documentation can use this article alongside our staff training and operations SOP and safety and emergency response framework, then request the current document set through the contact page.
Medical disclaimer: This article is provided for general information and operational planning only and is not medical advice. Hyperbaric oxygen therapy involves risks and is not suitable for everyone; untreated pneumothorax is a recognised absolute contraindication. Screening, eligibility and treatment decisions must be made by a clinician licensed in the operator’s jurisdiction, following local regulations and the manufacturer’s instructions for use. HyperbaricO2Care chambers are CE marked and manufactured under ISO 13485; no claim of FDA clearance is made for these devices, and no statement here should be read as a claim that they diagnose, treat, cure or prevent any disease.