A laparoscopic device for inverting a diverticulum, the device comprising: a tubular member configured to be laparoscopically deployed at a site surrounding a diverticulum on a body lumen, the tubular member comprising a working lumen, and a distal end configured to engage in a substantially airtight suction fit with tissue at the site surrounding the diverticulum, wherein: the device is configured to be able to apply a positive pressure to the working lumen, so that at least a portion of the diverticulum is inverted into the body lumen upon application of the positive pressure to the working lumen; the device further comprises a closure clip assembly configured to be able to be inserted through the working lumen, the closure clip assembly comprises a deployment tool (380, 381) and a closure clip (390, 391) for closing the inverted diverticulum, wherein the deployment tool is configured to deliver the closure clip into the working lumen to the inverted diverticulum, and the closure clip comprises: a distal region, and a plurality of closure arms extending proximally from the distal region, the plurality of closure arms including proximal tips biased radially inward. a tubular member configured to be laparoscopically deployed at a site surrounding a diverticulum on a body lumen, the tubular member comprising a working lumen, and a distal end configured to engage in a substantially airtight suction fit with tissue at the site surrounding the diverticulum, wherein: the device is configured to be able to apply a positive pressure to the working lumen, so that at least a portion of the diverticulum is inverted into the body lumen upon application of the positive pressure to the working lumen; the device further comprises a closure clip assembly configured to be able to be inserted through the working lumen, the closure clip assembly comprises a deployment tool (380, 381) and a closure clip (390, 391) for closing the inverted diverticulum, wherein the deployment tool is configured to deliver the closure clip into the working lumen to the inverted diverticulum, and the closure clip comprises: a distal region, and a plurality of closure arms extending proximally from the distal region, the plurality of closure arms including proximal tips biased radially inward. a working lumen, and a distal end configured to engage in a substantially airtight suction fit with tissue at the site surrounding the diverticulum, wherein: the device is configured to be able to apply a positive pressure to the working lumen, so that at least a portion of the diverticulum is inverted into the body lumen upon application of the positive pressure to the working lumen; the device further comprises a closure clip assembly configured to be able to be inserted through the working lumen, the closure clip assembly comprises a deployment tool (380, 381) and a closure clip (390, 391) for closing the inverted diverticulum, wherein the deployment tool is configured to deliver the closure clip into the working lumen to the inverted diverticulum, and the closure clip comprises: a distal region, and a plurality of closure arms extending proximally from the distal region, the plurality of closure arms including proximal tips biased radially inward. the device is configured to be able to apply a positive pressure to the working lumen, so that at least a portion of the diverticulum is inverted into the body lumen upon application of the positive pressure to the working lumen; the device further comprises a closure clip assembly configured to be able to be inserted through the working lumen, the closure clip assembly comprises a deployment tool (380, 381) and a closure clip (390, 391) for closing the inverted diverticulum, wherein the deployment tool is configured to deliver the closure clip into the working lumen to the inverted diverticulum, and the closure clip comprises: a distal region, and a plurality of closure arms extending proximally from the distal region, the plurality of closure arms including proximal tips biased radially inward. a distal region, and a plurality of closure arms extending proximally from the distal region, the plurality of closure arms including proximal tips biased radially inward.