belis wrote:
Willow wrote:
I agree that Molly was outraged, and I entirely sympathise with her, but she's not an anaesthetist or a physician; if she wanted to know if Sherlock had recently taken heroin all she had to do was look at his eyes. His pupils would have been constricted; it's really noticeable to anyone who knows what they are looking for.
Presumably the writers wanted to extend the scene so we had the stuff about urine samples, but I think it would have been great fun if Molly had done the diagnosis simply by staring into his eyes. It would have made the subsequent slaps even more dramatic
Looking for pupil's constriction is not the best way to asertain drug use for a number of reason. First of all we asume it's heroine but it could be concaine, amphetamine, benzos or any combination of those. Secondly heroine has short half life and the pupil constriction is only present for around 4 hours. It's easy to miss that window. Finally it's dose dependant. For someone who developed a degree of tolerance they need to take quite a large dose to develop pupils that are obviously small.
If present pin point pupils are a pretty reliable confirmation of opioid use. However absence of the sign doesn't exclude it. That's why we spend a lot of time and money on urinary drug screens.
I know. But it would have been much more fun than urine samples.
More seriously, we are discussing a particular event in Sherlock, not the NHS procedures in general; the timing shown in the episode put him in the 4 hour bracket, we were shown the teaspoon with the obvious inference of heroin, and normally doctors don't get nearly as het up about cocaine, speed or benzos as they do about heroin, possibly because use of the first three is not entirely unknown in a group of people trying to stay awake, go to sleep, and calm down. John Watson was a military doctor, and the military do use uppers, downers and steady as she goers fairly routinely when people are on missions. Heroin is a different ball game.
And since Barts is now a highly specialised hospital which doesn't have an A&E their labs are not set up for urinary drug screens; the writers are ignoring this, along with the fact that you cannot compel someone to provide samples without sound legal reason. The law is clear on this; Sherlock has not committed a 'trigger' offence and he has not been arrested because there's nothing to arrest him for. Hauling him off to Barts under compulsion was good drama but very bad law.
As I noted earlier, Sherlock undoubtedly could lay his hands on pharmaceutical grade diamorphine, along with an ample supply of naloxone; I do hope he was sensible enough to do so. But his nicotine addiction is far more likely to kill him than heroin...