Visitors of Patients in Qatar: The Article 4 Fourth Dose Restriction

An exclusion, then a restriction

A visitor of a patient is not measured by the limits of these instructions, and the text expressly places them outside those limits.

Article 4, fourth, provides that the dose limits set out in these instructions do not apply to persons visiting patients.

Nor does the text leave the visitor unchecked: it sets a restriction with two figures.

For an adult, the dose is not to exceed five millisieverts during the period of the diagnostic examination or the treatment.

For children visiting patients, the dose must not exceed one millisievert.

Why the visitor is treated separately

A visitor is not a worker: the item provides them neither a dosimeter nor training, and we build neither a duty nor an exemption on that.

That a patient may be a source after a radioactive substance has been administered is our description of practice; article 4, fourth, does not state it.

The text ties the adult figure to the period of the diagnostic examination or the treatment rather than to a year.

It ties the child figure to no period in its wording.

That is a difference in how the rule is built and not only in its amount.

The adult figure and its period

The adult figure is five millisieverts, and its period is that of the diagnostic examination or the treatment.

That period is described by the event rather than by the calendar, and the text states no number of days for it.

It is not called a year or a month, since that would add to the text.

Setting that period out in a written procedure is our reading of practice rather than wording in the item.

The millisievert (mSv) is one thousandth of a sievert, and the sievert is the unit of equivalent and effective dose.

The child figure and what the text leaves unsaid

The child figure is one millisievert, and the item provides that the dose must not exceed it.

Unlike the adult figure, the child figure is not tied to a period in the wording.

We see that as an open point in the text, so we carry no period over to it from the adult figure and invent none.

The text does not define a child and states no age for one.

So we name no age, and we do not infer one from article 2, which is about employment rather than visiting.

The word restriction and the word limit

The text provides that the dose received by any such person is to be restricted.

It is a restriction following an exclusion, not one of the limits of these instructions.

The effect of that difference is in the drafting and not in the amount: both figures are binding as worded.

This is our reading of how the item is built, and the text does not explain why it drew the distinction.

What the exclusion from the limits means

The exclusion at the opening of the item lifts from the visitor the dose limits set out in these instructions.

So a visitor is measured neither by a worker limit nor by the public limit in the second part.

That is the plain wording, and we add to it no restriction from elsewhere.

The structure is exclusion then restriction, and the exclusion on its own is not read as an exemption.

Transcribing the opening of the item without its remainder reads half of it.

This is our reading of how the item is built, and the text does not name that structure in its own wording.

And we build no ruling on that exclusion under another text we have not transcribed.

Four points left as they stand

First: the item does not say who carries out the restriction or how it is carried out.

Second: the item does not name a companion or a carer, only persons visiting patients.

Third: the articles of these instructions state no guidance level for medical exposure.

The tables of guidance levels are attached to the Decision and we have not seen their text, so we state no figure from them.

Fourth: the six articles of these instructions contain no penalty and no compliance period.

A worked case: a visit after a therapeutic dose

A patient has been given a therapeutic radioactive substance, and the family asks to visit.

An adult is then measured against five during the treatment period, and a child against one.

We infer from the two figures neither a permitted number of minutes nor a distance, since the text states neither.

Working out time and distance is for the licensee and its radiation protection officer.

The case here is assumed for the example, and the reading is ours rather than anything the Decision states.

Four practical steps

The department procedure states that a visitor is outside the limits of these instructions and has a restriction of their own.

The two figures are set out separately in the procedure: five for an adult during the period, and one for a child.

The basis of the two figures is named: article 4, fourth, of the instructions issued by Decision 2 of 2005.

The procedure is reviewed for every practice in which the patient is a source after administration.

The radiation protection officer prepares and reviews that procedure. That is what we train for, not what we do.

What is said to the visitor

A visitor is told what the department's written instructions provide, rather than a spoken estimate.

A visitor is not given a dose figure presented as a reading of their situation.

Anyone asking about a health effect is referred to the treating doctor rather than to this page.

We transcribe no medical guidance and no care instruction on this page.

What goes into the record

The date of the visit and the practice the patient was undergoing are recorded in the department log.

Whether the visitor is an adult or a child is recorded, since the two figures differ.

The basis of the figure applied is recorded from the item itself.

No estimate of a health effect goes into the log, since that is outside this page.

This is our reading of practice, and the item mentions no log for visitors.

Do the worker limits apply to a visitor of a patient?

No. The text expressly places the visitor outside the limits of these instructions.

It then sets a restriction for them with two figures in the same item.

What age is a child under this item?

The text does not define a child and states no age, and we see that as an open point in the text.

We do not infer it from article 2, which is about employment rather than visiting.

Is the child figure annual?

No, and we call it neither annual nor anything else, since the text sets no such description.

We carry no period over to it from the adult figure, since that would add to the text.

Does the item cover a patient's companion?

The item speaks of persons visiting patients, and names neither a companion nor a carer.

How far that wording reaches is a point we see as open, and we use it to exclude no one and include no one.

Does the item set a guidance level for medical exposure?

The item states no guidance level, and the tables of levels are attached to the Decision and we have not seen their text.

So we state no figure from them and no count of tables.

How we cite and transcribe

Article numbering restarts after the two enacting articles, so we say article 4 of the instructions issued by Decision 2 of 2005.

The Decision was issued on the basis of Law 31 of 2002 on radiation protection. Its basis also includes the executive regulation of that Law issued by Decision 4 of 2003, and the recommendation of the radiation protection committee.

The figures on this page come from the national text alone, and we build no ruling on an international standard.

The fourth part belongs to the same article 4 that carries the occupational exposure limits and the public limits, and each part has its own figures.

A figure is not imported from one part into another, nor from another decision onto this page.

Another page on this site covers protecting visitors and patient companions: /blog/protecting-visitors-and-patient-companions-qatar

The articles of these instructions do not name the radiation protection officer. What we say of that role describes practice rather than wording in these articles.

What we do and what we do not

ALDuha Institute for Training and Environmental Consulting is a training and consulting provider. The training is licensed.

We do not measure a dose, issue dosimeters, read a dosimeter, or calibrate one.

We do not carry out medical examinations, assess an individual exposure, or issue a worker dose record.

Who carries the duty

Monitoring and tracking exposure is the duty of the licensee, its radiation protection officer, and the approved dosimetry service.

That allocation describes practice rather than the wording of article 4, which is written in the passive and names no duty holder.

We do not measure on a facility's behalf, nor through anyone else, and we do not contract to read its workers' dosimeters.

The licensee turns to specialist partners where needed, and chooses the approved dosimetry service itself.

We give no promise that a licence will be issued, and no promise of a timeframe.

How to read the figures here

What is published here explains a binding text, and any figure in it is a general regulatory limit.

It is not a reading of anyone's dose, an assessment of their situation, or permission to carry on working.

An individual's reference point is the radiation protection officer at the licensee and their official dose record.

Failing that, the regulator: the Ministry of Environment and Climate Change, Radiation Protection Department.

We do not estimate a visitor's dose and we set no time or distance for them. We train people to read the item and its two figures.

Notice

This is an introductory explanation of a published text. It is not a legal opinion, and it does not replace consulting the competent authority.