# Blood gas partial pressure mapping for mmHg and kPa

**URL:** <https://forum.loinc.org/t/blood-gas-partial-pressure-mapping-for-mmhg-and-kpa/875>\
**Category:** chemistry\
**Created:** [September 16, 2015, 10:00pm UTC](https://forum.loinc.org/t/blood-gas-partial-pressure-mapping-for-mmhg-and-kpa/875 "2015-09-16T22:00:32Z")\
**Posts on this page:** 4\
**Page:** 1

<div class="post-metadata">

**Author:** ![barryfky](https://forum.loinc.org/letter_avatar_proxy/v4/letter/b/6de8d8/32.png) [@barryfky](https://forum.loinc.org/u/barryfky)\
**Post date:** [September 16, 2015, 10:00pm UTC](https://forum.loinc.org/t/blood-gas-partial-pressure-mapping-for-mmhg-and-kpa/875/1 "2015-09-16T22:00:32Z")

</div>

It was found that LOINC does not have suggested unit kPa for blood gas related tests. Should it be mapped with those LOINC code with suggesting unit= mmHg?

&nbsp;

Thanks

---

<div class="post-metadata">

**Author:** ![pdbanning](https://forum.loinc.org/letter_avatar_proxy/v4/letter/p/9f8e36/32.png) [@pdbanning](https://forum.loinc.org/u/pdbanning)\
**Post date:** [September 17, 2015, 10:26am UTC](https://forum.loinc.org/t/blood-gas-partial-pressure-mapping-for-mmhg-and-kpa/875/2 "2015-09-17T10:26:21Z")

</div>

Hello! You are correct, both the SI derived unit of measure for pressure, the Pascal unit and the routinely used (but not SI based) millimeter of mercury (mmHg) measure a gas from a pressure stand point.

The property attribute you would be seeking for each gaseous analyte is PPRES

Thank you for asking,

Pam Banning

---

<div class="post-metadata">

**Author:** ![barryfky](https://forum.loinc.org/letter_avatar_proxy/v4/letter/b/6de8d8/32.png) [@barryfky](https://forum.loinc.org/u/barryfky)\
**Post date:** [September 17, 2015, 10:30pm UTC](https://forum.loinc.org/t/blood-gas-partial-pressure-mapping-for-mmhg-and-kpa/875/3 "2015-09-17T22:30:03Z")

</div>

Thanks pdbanning~ Hope that LOINC can include SI and non-SI unit as example unit in the future.

Any guidline for LOINC code mapping to partial pressure reporting with Pascal unit?

Regards,

Barry

---

<div class="post-metadata">

**Author:** ![system](https://forum.loinc.org/uploads/default/original/1X/dbab97ce9b2987d788a376e254fcaae249f3b672.png) [@system](https://forum.loinc.org/u/system)\
**Post date:** [June 23, 2023, 3:36pm UTC](https://forum.loinc.org/t/blood-gas-partial-pressure-mapping-for-mmhg-and-kpa/875/4 "2023-06-23T15:36:34Z")

</div>