When Ian goes into respiratory distress the pillow is under his head in one shot, then it isn't, then it is, then we see Foreman removing it, before it reappears in another shot.
In the scene where Ian goes into Cardiac arrest, his hands jump from on his stomach to by his side between shots. He also moves his hand when he is supposed to be unconscious.
When House begins the heart biopsy, the room blinds are open and Ian's parents can be seen peering into the isolation room. In fact, Chase offers to close the blinds but House says, "No, let them watch. I do my best work on the big stage." When Ian goes into cardiac arrest we can see that the blinds are now closed; however, the parents can be seen behind the blinds. Next we see the hospital staff respond to the code blue. As the staff run towards the patient's room, Ian's parents appear across the hall and are now stepping towards their son's room in response to the commotion.
the teacher tells her class that blood returning to the heart is a "deep purple" this is in fact wrong the blood appears a darker red. Your veins only appear to flow with purple blood because of how your skin absorbs and reflects light.
When House and Wilson are playing head-to-head Texas Hold 'Em, House deals the flop without "burning" the top three cards as is required by the rules.
Nearly all the obstetrical issues on the show are incorrect and sometimes nonsensical. For example, in "Joy", there is no way to see pulmonary hypoplasia at 38 weeks on the ultrasound, and at that gestational age, if present, steroids would do nothing to improve it. It is obvious that a obstetrical specialist is not consulted in this series. Plus, there is no way House's team would care for or deliver a pregnant patient.
When HOUSE pulls Ester's file from his drawer, her name is spelled without an H. Presumably, this would have been consistent with her ID as it is a hospital generated file label. On the DDX whiteboard, House spells her name with an H, "Esther." Due to his attention to detail and obsession with her case, House would not have made this pedestrian mistake.
Dr. House has an injury in his right leg/foot and uses a walking stick to aid him. He uses the walking stick in his right hand. When using a walking stick, you should hold it in the hand opposite to your weak or injured leg. This shifts your body weight to your stronger side, which helps you avoid leaning too heavily on your painful side.