Hi Canadian PT
This is a normal part of entering the workforce. Often in your entry level training you don't get the complexity of cases that arise. You have to start somewhere. They are probably better off having you there than not having you there and for any organisation investing time and energy in helping junior staff get up to speed pays ample dividends. Here are some suggestions:
Don't be embarrassed about being on the back foot or having to ask questions. or if you can't shrug the embarrassment off why not disclose this to your supervising physio - often clearing the air about feeling inadequate can help get things sorted and help you get the support you need.
Sometimes staff may be a bit negative towards your clinical naivety simply because the pressure is on them to get through their case load. Making it clear how much you value and need their input from time to time can often improve matters.
Actively ask for feedback - This is one fundamental way of improving. Be thoughtful about a good moment to ask but make sure you do. see if you can get someone to sit in on a part of your session or for you to present the case to them and for them to be constructively critical about your performance.
Does your hospital have a policy or procedure on formal supervision? Having an opportunity to talk through issues and tricky cases with a supervisor on a regular basis in a relaxed way when you both have a bit of time, can be a great learning opportunity.
Do you practice reflective learning? Taking the time to plan ahead an evaluation or a treatment, then taking time after it is over to reflect on your performance, what worked, and what can be improved, and planning how you would apply what you learnt to future practice - can really help.
Don't brush over your achievements! Celebrate successes when you have really helped a patient in need.
Being involved in acute medical work carries its own stressors - patients are really ill and what you do can make a huge difference either way - it may not always be good. Patients will sometimes die - we do what we can but sometimes nothing will be enough. A significant proportion of patients will not survive their time in ICU and cardiac care. Personally I found this really hard and for me the decision early in my career was find another avenue. I settled on rehab and that was perfect for me. However whether CP physio is for you or not it is still a great learning experience. So keep a bit of distance on what you are doing.
What are you using for textbooks and are you continuing to brush up on your underling theory? I am sure you had some good texts recommended on your course. Make sure you use them. Keep applying the theory to your specific situations your patients are in. Do you include looking up the physiology (normal and abnormal) of the heart and lungs?
However one which may be a good addition to your standard texts is An On Call Survival Guide to Emergency Physiotherapy:
Emergency physiotherapy - Google Books
It is in that pocket book series so great to carry around with you.
I am not a very medically oriented physio so when I had to get involved in the acute/tertiary care setting I also invested in a pocket book that gives me all the medical tests that you might come upon in acute inpatient care was good - helped me understand what the patient was having done and why and what the results might mean with all the norms at hand.
Perhaps some cardiopulmonary physios could make some further suggestions for good reference material.
The last comment I would make is that first year is really crucial. It is probably the hardest in many ways but it is a real learning curve. When it is over you will look back on it and be amazed how much you learnt.
All the best with the job!