You can have trouble breathing with a broken nose. But it's not required.
It's possible. All sorts of things are possible.
Dr.s aren't very good at determining when a bruise occurred. But it's not uncommon for bruising to take a bit to show. Two black eyes are not uncommmon for a broken nose--doesn't mean he got hit in the eye (though he could've).
So it's possible that a Dr could provide reasonably accurate limits of when a bruise could've been initiated but w/o being able to pin down a time. IOW, a Dr may be able to rule out some time frames as possible candidates for when the injury hat created a bruise happened even though they can't say precisely which time frame the injury DID occur in.
Results. Fifty children with accidental bruises were
enrolled. Emergency pediatricians’ accuracy of age estimation within 24 hours of actual age was 47.6%. Individual emergency pediatrician’s accuracy ranged from 0% to
100%, and the interobserver reliability was poor (
0.03). Accuracy within 24 hours of actual age was 29.4%
for other physicians and 36.8% for trainees, which was
similar to the emergency pediatricians. Observers reported using color primarily to estimate age, followed by
tenderness and then swelling; however, none of these
factors was significantly correlated with accuracy.
Conclusions. Physician estimates of bruise age are
highly inaccurate within 24 hours of the actual age of the
injury. Large individual variability and poor interrater
reliability also suggest that caution must be used when
interpreting these estimates. This study supports earlier
studies, urging extreme caution in estimating bruise age,
even when such estimates are based on direct examination of the injured area