CNS oxygen toxicity is the main form seen in diving. Pulmonary oxygen toxicity is not of concern except in very long technical dives (extended cave or rebreather dives, for example) lasting six to 12 hours or more.Prolonged dives within the safe limits for CNS oxygen toxicity may still cause ocular toxicity, which manifests as a narrowing of the visual field and myopia.ulmonary oxygen toxicity is not of concern except in very long technical dives (extended cave or rebreather dives, for example) lasting six to 12 hours or more. Prolonged dives within the safe limits for CNS oxygen toxicity may still cause ocular toxicity, which manifests as a narrowing of the visual field and myopia.
Back to top. 1  No. The Ergo is designed so that your baby is carried in a seated position which supports the spine by dispersing the weight of the head over the hips, thighs and spine. 2  Because of this healthy and Ergonomic design, it is not possible to wear your baby facing out.
Then, place your fabrics wrong sides together and pin around the edges. Using a 1/4â³ seam allowance, stitch around three sides of the pouch, back stitching at the zipper to secure in place. Trim the points and at the closed side of the zipper. Turn bag wrong sides out, push out corners, and press seams.epeat for the other side, then fuse to the right side of the zipper. Using a zipper foot, stitch each side of the bag to one side of the zipper. Move your zipper pull to the middle of the zipper {I like to have it all the way open when I am stitching so it does not get in the way of my foot}.