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.
The best sleep position during pregnancy is âSOSâ (sleep on side). Even better is to sleep on your left side. Sleeping on your left side will increase the amount of blood and nutrients that reach the placenta and your baby. Keep your legs and knees bent, and put a pillow between your legs. 1  If you find that you are having problems with back pain, use the âSOSâ position, and try placing a pillow under your abdomen as well. 2  If you are experiencing heartburn during the night, you may want to try propping your upper body with pillows.