Weight - Revision history

Ellouise.Bishop@anthonynolan.org at 13:21, 29 October 2026

2026-10-29T13:21:59Z

← Older revision		Revision as of 13:21, 29 October 2026
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	Acceptable		Acceptable

	- For PBSC - if BMI less than, or equal to, 40.0.		*For PBSC - if BMI less than, or equal to, 40.0.

	- For BMH - if BMI less than, or equal to, 35.0.		*For BMH - if BMI less than, or equal to, 35.0.

Ellouise.Bishop@anthonynolan.org at 13:21, 29 October 2026

2026-10-29T13:21:34Z

← Older revision		Revision as of 13:21, 29 October 2026
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	==Explanation of Condition==		==Explanation of Condition==

	To calculate BMI, use this calculator:		To calculate body mass index (BMI), use this calculator:
			https://www.nhs.uk/health-assessment-tools/calculate-your-body-mass-index/

	~~[https://www~~.~~nhs~~.~~uk/health-assessment-tools/calculate-your-~~body-~~mass-index/]~~		==Justification==
			BMI is the most reliable tool to assess the body composition within the scientific community, and it is the criteria to based our decision upon, however it is an imperfect assessment. BMI may not be always accurate, particularly in ethnic minority groups. It is recognised that a high BMI does not always reflect body habitus and some high BMI donors may be fit and suitable to donate.

			It should be strictly followed at recruitment but donors outside these limits at work-up should be discus with the medical officer who may allow them to proceed after discussion with the Medical Director.

	==Guidance==		==Guidance==
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	- For PBSC - if BMI less than, or equal to, 40.0.		- For PBSC - if BMI less than, or equal to, 40.0.

	- For BM - if BMI less than, or equal to, 35.0.		- For BMH - if BMI less than, or equal to, 35.0.


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	Acceptable		Acceptable

	- For PBSC - If BMI less than, or equal to, 40.0 (If BMI 40-43 discuss with MO*).		*For PBSC - If BMI less than, or equal to, 40.0 (If BMI 40-43 discuss with MO).

			*For BMH - If BMI less than, or equal to, 35.0 (If BMI 35-40 OR discuss with MO).

	~~- For BM - If BMI less than, or equal to, 35.0 (If BMI 35-40 discuss with MO*).~~

	*BMI may not be accurate, particularly in ethnic minority groups. Consider donors with a borderline BMI on a case-by-case basis.		Donors with a borderline BMI can be considered on a case-by-case basis please see additional guidance below.

	- For donors ~~aged below~~ 18 years of age, please refer to the following link for the chart on what is acceptable/ not acceptable. : https://www.med-guidelines.org.uk/images/c/cc/Weight_categories_for_16-17_year_olds.png
			For donors >18 years of age, please refer to the following link for the chart on what is acceptable/ not acceptable: https://www.med-guidelines.org.uk/images/c/cc/Weight_categories_for_16-17_year_olds.png

	Please discuss with a MO if the donor is showing to be outside the healthy range.		Please discuss with a MO if the donor is showing to be outside the healthy range.


			<u>Underweight</u>

			Adult donors weighing less than 30 kg should not be accepted, since the volume of the cell separator machine’s extracorporeal circuit would then exceed 15% of the donor’s total blood volume, with unacceptable risks of hypovolaemia and/or vasovagal issues.

			Discuss with MO any donor with weight <45kg or <50kg if donor's weight is significantly less than the recipient with a MO (consider CC discussion if concern over blood volume).

			Donors with a low BMI should be assessed for any underlying eating disorder or medical condition contributing to their weight. It is also important to ensure they are not experiencing symptoms related to a low BMI.

	There is no minimum weight but donors with a low BMI should be assessed for any underlying eating disorder or medical condition contributing to their weight. It is also important to ensure they are not experiencing symptoms related to a low BMI.
	For donors with a low weight, check with the TC to confirm whether the weight discrepancy is acceptable.		For donors with a low weight, check with the TC to confirm whether the weight discrepancy is acceptable.
	~~Discuss any donor with weight <45kg with a MO (consider CC discussion if concern over blood volume).~~

	~~Potential donors with BMI >35-40 may have complications prior, during and after the harvest:~~

	~~- PBSC - poor venous access, need of central line insertion (and its subsequent complications). Risk is less clear than BM so greater discretion may be used.~~		<u>Overweight or obese</u>

	~~- BM - should be carefully assessed for additional anaesthetic~~ risk ~~factors (e.g. cardiovascular~~, ~~respiratory~~ and endocrine disease). If no additional risk factors donor may at discretion of MO proceed to medical assessment when an anaesthetic opinion is mandatory before donor can be cleared to donate. At medical donor must also be examined to decide whether a BMH is technically possible. The collection centre must be alerted to this additional requirement before donor is sent to medical.		Potential donors with higher BMIs may have higher risk of complications prior, during and after the procedure

	~~==Justification==~~		*PBSC (BMI >40-43) - Risk is less clear than BM so greater discretion may be used. Poor venous access and need of central line insertion (and its subsequent complications) is more likely. Other considerations include ability to mobilise on to or off donation couch. Donors who are overweight or obese tend to have more moderate to severe pain with PBSC donation.
	BMI is ~~the most reliable tool to assess the body composition within the scientific community,~~ and it is ~~the criteria~~ to ~~based our decision upon, however it is an imperfect assessment~~. ~~BMI may not be always accurate, particularly in ethnic minority groups~~.

	It should be ~~strictly followed~~ at ~~recruitment but donors outside these limits at work-up should~~ be ~~discus with the~~ medical ~~officer who may allow them to proceed after discussion with the Medical Director~~.		*BMH (BMI >35-40) - Bone marrow harvest is a more difficult procedure in overweight donors. They should be carefully assessed for additional anaesthetic risk factors (e.g. cardiovascular, respiratory and endocrine disease). If no additional risk factors donor may at discretion of MO proceed to medical assessment when an anaesthetic opinion is mandatory and donor examined to decide whether it is technically possible. The collection centre must be alerted to this additional requirement before donor is sent to medical.

	==Pseudonyms or Related Conditions==		==Pseudonyms or Related Conditions==
	Obesity		Obesity

			Overweight

			Underweight

	==Version==		==Version==
	Version 1, Edition 5		Version 1, Edition 6

	====Date of Last Update====		====Date of Last Update====
	25th June 2026		25th June 2026
			29th October 2026

Frances.Sarkari@anthonynolan.org: /* Guidance */

2026-09-29T14:47:10Z

Guidance

← Older revision		Revision as of 14:47, 29 September 2026
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	- For donors aged below 18 years of age, please refer to the following link for the chart on what is acceptable/ not acceptable. : https://www.med-guidelines.org.uk/images/c/cc/Weight_categories_for_16-17_year_olds.png		- For donors aged below 18 years of age, please refer to the following link for the chart on what is acceptable/ not acceptable. : https://www.med-guidelines.org.uk/images/c/cc/Weight_categories_for_16-17_year_olds.png

	Please discuss with a MO if the donor is showing to be ~~underweight or in~~ the ~~Class II Obesity and above categories~~		Please discuss with a MO if the donor is showing to be outside the healthy range.

Frances.Sarkari@anthonynolan.org: /* Guidance */

2026-09-29T14:45:01Z

Guidance

← Older revision		Revision as of 14:45, 29 September 2026
Line 36:		Line 36:

	- For donors aged below 18 years of age, please refer to the following link for the chart on what is acceptable/ not acceptable. : https://www.med-guidelines.org.uk/images/c/cc/Weight_categories_for_16-17_year_olds.png		- For donors aged below 18 years of age, please refer to the following link for the chart on what is acceptable/ not acceptable. : https://www.med-guidelines.org.uk/images/c/cc/Weight_categories_for_16-17_year_olds.png

	Please discuss with a MO if the donor is showing to be underweight or in the Class II Obesity and above categories		Please discuss with a MO if the donor is showing to be underweight or in the Class II Obesity and above categories

Frances.Sarkari@anthonynolan.org: /* Guidance */

2026-09-29T14:43:51Z

Guidance

← Older revision		Revision as of 14:43, 29 September 2026
Line 37:		Line 37:
	- For donors aged below 18 years of age, please refer to the following link for the chart on what is acceptable/ not acceptable. : https://www.med-guidelines.org.uk/images/c/cc/Weight_categories_for_16-17_year_olds.png		- For donors aged below 18 years of age, please refer to the following link for the chart on what is acceptable/ not acceptable. : https://www.med-guidelines.org.uk/images/c/cc/Weight_categories_for_16-17_year_olds.png
	Please discuss with a MO if the donor is showing to be underweight or in the Class II Obesity and above categories		Please discuss with a MO if the donor is showing to be underweight or in the Class II Obesity and above categories

Frances.Sarkari@anthonynolan.org: /* Guidance */

2026-09-29T14:43:02Z

Guidance

← Older revision		Revision as of 14:43, 29 September 2026
Line 35:		Line 35:
	*BMI may not be accurate, particularly in ethnic minority groups. Consider donors with a borderline BMI on a case-by-case basis.		*BMI may not be accurate, particularly in ethnic minority groups. Consider donors with a borderline BMI on a case-by-case basis.

	- For donors aged below 18 years of age, please refer to the following link for the chart on what is acceptable/ not acceptable. ~~Please discuss with a MO if the donor is showing to be underweight or in the Class II Obesity and above categories~~: https://www.med-guidelines.org.uk/images/c/cc/Weight_categories_for_16-17_year_olds.png		- For donors aged below 18 years of age, please refer to the following link for the chart on what is acceptable/ not acceptable. : https://www.med-guidelines.org.uk/images/c/cc/Weight_categories_for_16-17_year_olds.png
			Please discuss with a MO if the donor is showing to be underweight or in the Class II Obesity and above categories

Frances.Sarkari@anthonynolan.org: /* Guidance */

2026-09-29T14:40:12Z

Guidance

← Older revision		Revision as of 14:40, 29 September 2026
Line 35:		Line 35:
	*BMI may not be accurate, particularly in ethnic minority groups. Consider donors with a borderline BMI on a case-by-case basis.		*BMI may not be accurate, particularly in ethnic minority groups. Consider donors with a borderline BMI on a case-by-case basis.

	- For donors aged below 18 years of age, please refer to the following link for the chart on what is acceptable/ not acceptable. Please discuss with a MO if the donor is showing to be underweight or in the Class II Obesity and above categories:		- For donors aged below 18 years of age, please refer to the following link for the chart on what is acceptable/ not acceptable. Please discuss with a MO if the donor is showing to be underweight or in the Class II Obesity and above categories: https://www.med-guidelines.org.uk/images/c/cc/Weight_categories_for_16-17_year_olds.png

Frances.Sarkari@anthonynolan.org: /* Guidance */

2026-09-29T14:37:00Z

Guidance

← Older revision		Revision as of 14:37, 29 September 2026
Line 34:		Line 34:

	*BMI may not be accurate, particularly in ethnic minority groups. Consider donors with a borderline BMI on a case-by-case basis.		*BMI may not be accurate, particularly in ethnic minority groups. Consider donors with a borderline BMI on a case-by-case basis.

			- For donors aged below 18 years of age, please refer to the following link for the chart on what is acceptable/ not acceptable. Please discuss with a MO if the donor is showing to be underweight or in the Class II Obesity and above categories:


	There is no minimum weight but donors with a low BMI should be assessed for any underlying eating disorder or medical condition contributing to their weight. It is also important to ensure they are not experiencing symptoms related to a low BMI.		There is no minimum weight but donors with a low BMI should be assessed for any underlying eating disorder or medical condition contributing to their weight. It is also important to ensure they are not experiencing symptoms related to a low BMI.

Frances.Sarkari@anthonynolan.org: /* Acceptability at CT / Work-Up */

2026-08-04T10:53:05Z

Acceptability at CT / Work-Up

← Older revision		Revision as of 10:53, 4 August 2026
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	QUALIFIED		QUALIFIED

	==Acceptability at CT / Work-Up==		==Acceptability at VT / Work-Up==
	QUALIFIED		QUALIFIED

Natalie.Murray@anthonynolan.org: /* Version */

2026-07-03T08:04:34Z

Version

← Older revision		Revision as of 08:04, 3 July 2026
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	==Version==		==Version==
	Version 1, Edition 4		Version 1, Edition 5

	====Date of Last Update====		====Date of Last Update====
	25th June 2026		25th June 2026