Re: Alimentary Limb - Please Answer!--Chris Hull

[Guest guest]

--- chull1@... wrote:

> With a 250cm alimentary limb you will absorb roughly 60% of your

> carbs. You will absorb about 30-40% of your fat intake.

Chris....

Where did you get this information? I have searched and searched and

cannot find anything about the carb absorption.

Thanks a lot...

H

__________________________________________________

[Guest guest]

H,

Here is the article based on the clasic Scopinaro procedure (250cm

alimentary limb, 50cm common tract).

Please note that nitrogen absorption is related to protien

absorption, and energy absorption is the same as calories absorbed.

Please note that has added this and about 70 other abstracts

that I dug up to the duodenal switch web site.

http://www.duodenalswitch.com/Procedure/BPDabstracts.pdf

Hull

Energy and nitrogen absorption after biliopancreatic diversion.

Obes Surg 2000 Oct;10(5):436-41 (ISSN: 0960-8923)

Scopinaro N; Marinari GM; Pretolesi F; Papadia F; Murelli F; Marini

P; Adami GF [Find other articles with these Authors]

Department of Surgery, University of Genoa Medical School, Genoa,

Italy. scopinar@....

BACKGROUND: The strict long-term weight maintenance in good

nutritional conditions observed after biliopancreatic diversion (BPD)

needs to be explained. MATERIALS AND METHODS: 15 operated subjects

were maintained at an isoenergetic and isonitrogenic diet as similar

as possible to their usual diet. Apparent absorption (AA) of energy,

fat, nitrogen and calcium was calculated subtracting the fecal

content, measured directly, from the oral intake, derived from

tables. The alimentary protein absorption was directly determined by

I125 albumin oral administration. RESULTS: Mean AA for energy and fat

was 57% and 32%, respectively; AAs were unrelated as absolute value

and negatively associated as percent of the intake with the energy

and fat intake. I125 intestinal absorption was 73%, while nitrogen

percent AA was 57%, indicating higher than normal loss of endogenous

nitrogen. Calcium AA was 551 mEq/day, 26% of the intake. A positive

correlation between nitrogen and calcium AA as absolute values and

alimentary intake was observed, while there was no correlation when

AA were considered as per cent of the intake. CONCLUSIONS: For energy

and fat, an increase in intake corresponds to an increase in percent

malabsorption, so that the absolute amount absorbed tends to remain

constant, accounting for the excellent weight maintenance observed

following BPD. This was confirmed by a long-term hypernutrition study

after BPD. On the contrary, for nitrogen and calcium, the percent

absorption tends to remain constant when intake varies, so that an

increase in alimentary intake results in an increased absolute amount

absorbed.

> > With a 250cm alimentary limb you will absorb roughly 60% of your

> > carbs. You will absorb about 30-40% of your fat intake.

>

>

> Chris....

>

> Where did you get this information? I have searched and searched and

> cannot find anything about the carb absorption.

>

> Thanks a lot...

>

> H

>

> __________________________________________________

>

[Guest guest]

H,

Here is the article based on the clasic Scopinaro procedure (250cm

alimentary limb, 50cm common tract).

Please note that nitrogen absorption is related to protien

absorption, and energy absorption is the same as calories absorbed.

Please note that has added this and about 70 other abstracts

that I dug up to the duodenal switch web site.

http://www.duodenalswitch.com/Procedure/BPDabstracts.pdf

Hull

Energy and nitrogen absorption after biliopancreatic diversion.

Obes Surg 2000 Oct;10(5):436-41 (ISSN: 0960-8923)

Scopinaro N; Marinari GM; Pretolesi F; Papadia F; Murelli F; Marini

P; Adami GF [Find other articles with these Authors]

Department of Surgery, University of Genoa Medical School, Genoa,

Italy. scopinar@....

BACKGROUND: The strict long-term weight maintenance in good

nutritional conditions observed after biliopancreatic diversion (BPD)

needs to be explained. MATERIALS AND METHODS: 15 operated subjects

were maintained at an isoenergetic and isonitrogenic diet as similar

as possible to their usual diet. Apparent absorption (AA) of energy,

fat, nitrogen and calcium was calculated subtracting the fecal

content, measured directly, from the oral intake, derived from

tables. The alimentary protein absorption was directly determined by

I125 albumin oral administration. RESULTS: Mean AA for energy and fat

was 57% and 32%, respectively; AAs were unrelated as absolute value

and negatively associated as percent of the intake with the energy

and fat intake. I125 intestinal absorption was 73%, while nitrogen

percent AA was 57%, indicating higher than normal loss of endogenous

nitrogen. Calcium AA was 551 mEq/day, 26% of the intake. A positive

correlation between nitrogen and calcium AA as absolute values and

alimentary intake was observed, while there was no correlation when

AA were considered as per cent of the intake. CONCLUSIONS: For energy

and fat, an increase in intake corresponds to an increase in percent

malabsorption, so that the absolute amount absorbed tends to remain

constant, accounting for the excellent weight maintenance observed

following BPD. This was confirmed by a long-term hypernutrition study

after BPD. On the contrary, for nitrogen and calcium, the percent

absorption tends to remain constant when intake varies, so that an

increase in alimentary intake results in an increased absolute amount

absorbed.

> > With a 250cm alimentary limb you will absorb roughly 60% of your

> > carbs. You will absorb about 30-40% of your fat intake.

>

>

> Chris....

>

> Where did you get this information? I have searched and searched and

> cannot find anything about the carb absorption.

>

> Thanks a lot...

>

> H

>

> __________________________________________________

>