R.J.
I'm screwed up my right shoulder this winter. First, I dislocated my clavicle deadlifting an 80lb sleeping child from the Jeep (only done that a gazillion times). Headsmack. Then I popped it back in by falling down snowboarding a few weeks later, and in the process stripped the tendons and ligaments away from the bones of my humerus/ shoulder and snapped a wedge shaped piece of cartilage off of the 'cup' that the humerus fits into. . Brilliant. Just brilliant. Hurts like blazes
Apparently, however, it's one of THE most common shoulder injuries. I was hoping for a simple sprain, so waited about 6 weeks before grumbling and realizing that I needed to go see what I did to myself. (My doctor loves/ hates me. He knows if I ever actually drag myself in to see him it's something serious. But he always laughs at me. "You know MOST people..." Mmmmhmmm. At least the shoulder specialist is a sports med guy. He's used to his patients just strapping themselves back together/ coming in after several weeks to see how much they'd heal on their own).
I'm currently awaiting Bankart repair surgery to correct it. (I have an insurance lapse) In order to diagnose it we did the standard xrays and MRI. 6 weeks of acute recovery, and 6 months of physical therapy / no sports. :P
My own son is 8, but I've been helping care for an infant these past months. It DEFINITELY requires some accommodation. I can use my right arm to 'brace', but have to use my left arm for all the detail work and heave lifting. A LOT of the time I just use imaginary 'glue' and keep my elbow at my side so that I don't stretch or twist my shoulder at all, and then do 90% of the work left handed.
Diaper changes... R hand on her abdomen, left hand does straps, lifting of feet, snagging another diaper, wiping, all that jazz. Yes. It's gimpy. But it works.
Picking up... R hand under her armpit, L arm goes underneath her and picks her up. (AKA R side is just keeping her from rolling off).
Holding in general: A LOT of 'cross legged' holds (also makes it very easy to snake my left arm in to pick her up securely.
A LOT of up/down. I have to use my legs. I can't just bend down and pick her up with both arms, so I need to get my left elbow parallel to her. Which means I go all the way down, and then come all the way up.
Essentially, just a lot of improvising and adapting.
This is all PRE surgery. Post surgery my arm is going to be completely immobilized for 6 weeks. I will NOT be able to care for her on my own.