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To allow it to be Options
Jigneshbharati
Posted: Friday, April 13, 2018 12:01:57 AM
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Joined: 11/3/2016
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Before you can start haemodialysis there needs to be a way to remove blood from your body, to allow it to be cleaned using the dialysis machine, and then returned back to you.

https://www.uhb.nhs.uk/Downloads/pdf/PiRenalVascularAccess.pdf

Please explain the use of commas before "to allow..." and "and then...".

What is the subject for those two comma separated infinitives?
FounDit
Posted: Friday, April 13, 2018 2:44:08 PM

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Jigneshbharati wrote:
Before you can start haemodialysis there needs to be a way to remove blood from your body, to allow it to be cleaned using the dialysis machine, and then returned back to you.

https://www.uhb.nhs.uk/Downloads/pdf/PiRenalVascularAccess.pdf

Please explain the use of commas before "to allow..." and "and then...".

What is the subject for those two comma separated infinitives?


The commas are used to identify steps, or items in a kind of list.
Similar to saying, "Everyone engages in the activities of eating, drinking, and sleeping during a day".

In this case, you have a list of phrases that explain what is necessary for hemodialysis. Before starting hemodialysis, there needs to be a way of removing the blood, cleaning the blood, and returning the blood.


We should look to the past to learn from it, not destroy our future because of it — FounDit
Audiendus
Posted: Friday, April 13, 2018 8:59:03 PM
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Joined: 8/24/2011
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Location: London, England, United Kingdom
FounDit wrote:
Jigneshbharati wrote:
Before you can start haemodialysis there needs to be a way to remove blood from your body, to allow it to be cleaned using the dialysis machine, and then returned back to you.

The commas are used to identify steps, or items in a kind of list.
Similar to saying, "Everyone engages in the activities of eating, drinking, and sleeping during a day".

In this case, you have a list of phrases that explain what is necessary for hemodialysis. Before starting hemodialysis, there needs to be a way of removing the blood, cleaning the blood, and returning the blood.

If this is a list of three phrases, the structure ought to be parallel (to remove blood..., to allow it to be cleaned...,and then to return it...). Instead, we have "and then returned".

Also, the adverbial phrase "before you can start haemodialysis" can only relate to the phrase "there needs to be a way to remove blood from your body". The next stage (the cleaning) is the dialysis.

I would keep the comma after "body" but remove the one after "machine":

Before you can start haemodialysis there needs to be a way to remove blood from your body, [in order] to allow it to be cleaned using the dialysis machine and then returned back to you. ["Back" can be omitted.]

We then have a suitably parallel structure with two items (cleaned...and then returned).
Jigneshbharati
Posted: Saturday, April 14, 2018 4:17:34 AM
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Joined: 11/3/2016
Posts: 1,893
Neurons: 10,767
Thanks. Is "a way" an implied subject before all those infinitive phrases?
Aw
Audiendus
Posted: Saturday, April 14, 2018 7:54:09 AM
Rank: Advanced Member

Joined: 8/24/2011
Posts: 5,192
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Location: London, England, United Kingdom
Jigneshbharati wrote:
Thanks. Is "a way" an implied subject before all those infinitive phrases?

Personally, I don't think so. I think "a way" applies only to "to remove blood from your body". The meaning seems to be:

a way to remove blood from your body
in order to allow it to be (a) cleaned using the dialysis machine and then (b) returned [back] to you.

The sentence states: "Before you can start haemodialysis there needs to be a way...". Only the removal of blood takes place before you start haemodialysis.
Jigneshbharati
Posted: Saturday, April 14, 2018 10:09:31 AM
Rank: Advanced Member

Joined: 11/3/2016
Posts: 1,893
Neurons: 10,767
Thanks
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