Bolivian Knitters Help Heal Hearts

The indigenous Aymara women of Bolivia have knitting as part of their heritage, but now they are able to use old skills in a new way by helping make medical devices to save the lives of children born with holes in their hearts.

The device, known as Nit Occlud, was designed by Franz Freudenthal, a cardiologist in La Paz. It looks like a little top hat knit out of wire and can be made in different sizes to block a hole in the heart.

It’s made of nitinol, a nickel-titanium alloy, and can be collapsed and inserted into the body through a catheter. It’s only expanded when it gets where it needs to go, making the procedure minimally invasive and inexpensive, which is a must in Bolivia, the poorest nation in South America and a place without enough cardiac doctors to treat kids with heart problems, which can also be more serious in the high altitudes.

It takes about two hours working in a clean room to knit a device, and knitter Daniela Mendoza told the BBC she’s glad to be able to help.

“We are very happy, we are doing something for someone so they can live,” she said.

[Photo via BBC.]

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Tif Neilan is a known fan of herringbone stitch as a design element in her patterns. I love it, too, and have written a couple of posts about herringbone stitch and other ways to make herringbone designs in knitting.

Tif uses a herringbone stitch on the cuffs of her Ebbs & Flows sweater, a top down raglan design that also features a bit of mosaic colorwork at the hem and on the sleeves.

The herringbone bit is optional, as the pattern also includes instructions for working twisted ribbing instead, but the herringbone gives such a different textured look that I think it’s worth the effort of learning how to do it for this design.

It is worked in the round except for some German short rows for shaping after the neckline. It’s meant to hit at the high hip but you could make it longer or more cropped as you like.

The pattern comes in 10 sizes, with a finished chest circumference ranging from 32 to 68 inches, or 80 to 170 cm. It is designed to be worn with around 4 inches/10 cm of positive ease at the chest.

It calls for three colors of DK or worsted weight yarn, though you’ll need a relatively small amount of the contrasting colors since most of the body is worked in a solid color. Because of the different stitches used you’ll need a variety of knitting needle sizes and the pattern notes recommend having a set of interchangeable knitting needles to make this easier, but you can always use what you have.

You can find out more about this pattern and grab a copy on Ravelry. There are already a good number of finished projects in the gallery there so you can see how it works with different colors and different body and sleeve lengths (they’re meant to be long but I spy a couple that look like three quarters).

[Photo: Tif Neilan]

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