Kidney Purse - Revision history

Neufi03p at 01:38, 5 November 2020

2020-11-05T01:38:22Z

← Older revision		Revision as of 01:38, 5 November 2020
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	This model can be used to impress on students the overall length of nephrons to the students, and how important that length is for effective filtering of the blood. The model also helps them understand that if we have something the size of a kidney purse, the nephrons themselves must be microscopic to fit in there, which is why it’s important for the students to study the histology, to understand what’s going on in those very small structures.		This model can be used to impress on students the overall length of nephrons to the students, and how important that length is for effective filtering of the blood. The model also helps them understand that if we have something the size of a kidney purse, the nephrons themselves must be microscopic to fit in there, which is why it’s important for the students to study the histology, to understand what’s going on in those very small structures.

	[http://www.otago.ac.nz/anatomy/otago649835.mp4 Movie of nephron string being pulled out of Kidney Purse]		[http://www.otago.ac.nz/anatomy/otago649835.mp4 Movie of nephron string being pulled out of Kidney Purse] If the movie does not play properly, try a different browser.

	Click to enlarge the image of the Kidney Purse:		Click to enlarge the image of the Kidney Purse:

Neufi03p at 21:40, 25 May 2017

2017-05-25T21:40:29Z

← Older revision		Revision as of 21:40, 25 May 2017
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	<gallery mode="nolines" widths=~~200px~~ heights=200px>		<gallery mode="nolines" widths=250px heights=200px>
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	<gallery mode="nolines" widths=~~200px~~ heights=200px>		<gallery mode="nolines" widths=250px heights=200px>
	KidneyPurse5.jpg\|		KidneyPurse5.jpg\|
	KidneyPurse6.jpg\|		KidneyPurse6.jpg\|
	</gallery>		</gallery>

			Background grid for the pattern is 100mm x 100mm.

	'''Creators:''' Dr Rebecca Bird (initial idea and academic support), Fieke Neuman (reel, patterns and sewing). Both from [http://www.otago.ac.nz/anatomy Department of Anatomy], [http://www.otago.ac.nz University of Otago]		'''Creators:''' Dr Rebecca Bird (initial idea and academic support), Fieke Neuman (reel, patterns and sewing). Both from [http://www.otago.ac.nz/anatomy Department of Anatomy], [http://www.otago.ac.nz University of Otago]

Neufi03p: Created page with "=Kidney Purse= There are about a million nephrons in each kidney, and each nephron is about 30mm long. So that’s roughly 30km of nephron per kidney. If the string in the kid..."

2017-05-25T21:33:25Z

Created page with "=Kidney Purse= There are about a million nephrons in each kidney, and each nephron is about 30mm long. So that’s roughly 30km of nephron per kidney. If the string in the kid..."

New page

=Kidney Purse=
There are about a million nephrons in each kidney, and each nephron is about 30mm long. So that’s roughly 30km of nephron per kidney. If the string in the kidney purse is 15m long, that would mean 2000 times as long as can be pulled out of the purse in a lecture theatre.

This model can be used to impress on students the overall length of nephrons to the students, and how important that length is for effective filtering of the blood. The model also helps them understand that if we have something the size of a kidney purse, the nephrons themselves must be microscopic to fit in there, which is why it’s important for the students to study the histology, to understand what’s going on in those very small structures.

[http://www.otago.ac.nz/anatomy/otago649835.mp4 Movie of nephron string being pulled out of Kidney Purse]

Click to enlarge the image of the Kidney Purse:
<gallery mode="nolines" widths=200px heights=200px>
KidneyPurse1.jpg|
</gallery>

== Production Information ==
The string is wound onto on a reel inside a reel case, that can be tucked inside the kidney purse.

The reel is made from aluminium circles joined to a spindle made from a hollow rod of aluminium. Large-gauge screws are used to join the circles to the spindle.

The reel case is a section of PVC plumbing pipe, in this example 38mm diameter, sealed at both ends with duct tape. The inner surface of the duct tape is covered over so it doesn’t stick and two washers of felt help the reel move freely within the case.

The string is brightly coloured builder’s twine and runs from a small hole in the reel spindle and out of a large, smooth hole in the side of the reel case. About 15 meters of string were used in this example.

Click to enlarge images:
<gallery mode="nolines" widths=200px heights=200px>
KidneyPurse2.jpg|
KidneyPurse3.jpg|
KidneyPurse4.jpg|
</gallery>

One end of the reel case has a hole though which a screwdriver can be inserted to wind the string onto the reel. An electric screwdriver of some kind is actually better than hand-winding the reel since the more even winding action means the string is less likely to snag when being pulled out.

The leather purse was designed to fit around the reel case without being too tight. A zip is inserted into the long curve and a small gap is left at the hilum, through which the string can run. The end of the string is finished with a fold of leather to simulate the start of the ureter. Dacron wadding is used to pad out the inside of the purse, around the reel case.

Click to enlarge images:
<gallery mode="nolines" widths=200px heights=200px>
KidneyPurse5.jpg|
KidneyPurse6.jpg|
</gallery>

'''Creators:''' Dr Rebecca Bird (initial idea and academic support), Fieke Neuman (reel, patterns and sewing). Both from [http://www.otago.ac.nz/anatomy Department of Anatomy], [http://www.otago.ac.nz University of Otago]

'''Keywords:''' Teaching, Anatomy, Kidney, Urinary system, Science, Biology

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