The human body is amazing. Those of you know know me know I am in love with anatomy and physiology. I find it hard to understand people who dont look at the processes of the human body with awe.
If you are going through extreme physical stress your body secretes adrenaline which blocks out the pain from physical trauma. It slows non-essential function like digestion and diverts oxygen rich blood to the muscles. Your pupils dilate and contract much more quickly, signals are transmitted too and from the brain at an increasing rate. Everything about this chemical is designed to pull the body out of danger.
Even a simple non-life threatening incident like stepping on a pin invokes a reaction called a reflex-arc. This means your body knows there is a threat, it pulls your foot away from the pin before the pain message is even sent to the brain and interpreted. Its a purely localised self-defense mechanism that can occur at any point of the body.
If you are exposed to severe psychological trauma your mind takes you where you need to go in order to survive it. And then, when you are safe it blocks the memories in order to prevent them having a detrimental effect.
Both the body and mind are full of failsafes designed and tested over the last billion or so years in order to keep you alive.
Tuesday, 13 May 2008
Monday, 12 May 2008
The Right Tool
These days paracetamol is a very widely appreciated drug. Its an effective analgesic for mild pain and it has possitive effects in controlling a fever. However I feel this is a bad thing.
In hospital if a patient has a fever the doctors tend to put them on intravenous paracetamol. Paracetamol resets the hypothalamus. If your body had a central heating system which was overheating the paracetamol would be like turning it off and on again, when the system comes back up its at the right temperature(usually). This is aweful, whilst the patient is more comfortable because they no longer have a fever and have some mild pain relief, a diagnostically relevant symptom is being masked.
This patient could have a raging infection, or a mass in their brain, however the key sign pointing at the problem has been temporarily removed. As a student nurse I am meant to believe that its more important for a patient to be comfortable and pain free, however that is not how I feel. I would sooner have a patient correctly diagnosed earlier on with some pain and discomfort during the diagnosis than having a patient who isnt diagnosed until its too late to treat them.
This is one of my key gripes with the NHS today, its too cuddly. Let the patients grit their teeth and bare it, a little discomfort wont kill them, terminal cancer WILL kill them.
In hospital if a patient has a fever the doctors tend to put them on intravenous paracetamol. Paracetamol resets the hypothalamus. If your body had a central heating system which was overheating the paracetamol would be like turning it off and on again, when the system comes back up its at the right temperature(usually). This is aweful, whilst the patient is more comfortable because they no longer have a fever and have some mild pain relief, a diagnostically relevant symptom is being masked.
This patient could have a raging infection, or a mass in their brain, however the key sign pointing at the problem has been temporarily removed. As a student nurse I am meant to believe that its more important for a patient to be comfortable and pain free, however that is not how I feel. I would sooner have a patient correctly diagnosed earlier on with some pain and discomfort during the diagnosis than having a patient who isnt diagnosed until its too late to treat them.
This is one of my key gripes with the NHS today, its too cuddly. Let the patients grit their teeth and bare it, a little discomfort wont kill them, terminal cancer WILL kill them.
Thursday, 8 May 2008
Overdose
In todays world drugs are everywhere. Speaking as a healthcare professional I know people will always take drugs. Many heroin users every day accidentally overdose. Theres no medically recommended dose for heroin as its use is frowned upon.
There is a drug available that halts the deterioration of a patients state when he has taken an overdose. This drug is called Naloxone and is administered in hospitals for accidental morphine(essentially heroin) overdoses. I would argue that chemists should provide this drug over the counter. We cant stop people taking heroin but maybe if we make this opiate-antagonist more freely available we can stop people dying from heroin use.
One argument against this is that if users know they can reverse any accidental overdose they might be more inclined to take more heroin, or even deliberately overdose just so they could reverse it and have the full 'trip' effect.
I dont agree with the use of drugs, but I am sick of seeing people kill themselves when it can be prevented.
There is a drug available that halts the deterioration of a patients state when he has taken an overdose. This drug is called Naloxone and is administered in hospitals for accidental morphine(essentially heroin) overdoses. I would argue that chemists should provide this drug over the counter. We cant stop people taking heroin but maybe if we make this opiate-antagonist more freely available we can stop people dying from heroin use.
One argument against this is that if users know they can reverse any accidental overdose they might be more inclined to take more heroin, or even deliberately overdose just so they could reverse it and have the full 'trip' effect.
I dont agree with the use of drugs, but I am sick of seeing people kill themselves when it can be prevented.
Wednesday, 7 May 2008
Builders
Time for a little science lesson on how cells that secrete things work.
The DNA in a cell is kept inside the nucleus. This is a problem because the pores in the nuclear membrane are way too small to let the DNA through. Thats were messengerRNA(mRNA) and reverse transcriptase come in. Between the two of them the take a copy of a small segment of DNA and carry it out to the Rough Endoplasmic Reticulum(Rough ER) which takes that small genetic blueprint and creates a series of amino acids from it. When they are linked together amino acids are proteins, proteins are pretty much everything you're build up from in one way or another. This protein then makes its way to the smooth ER which packages it and sends it on its way out of hte cell.
I find this process incredible. Its one of the fundamental requirements for life and it happens in much of our body every millisecond.
The DNA in a cell is kept inside the nucleus. This is a problem because the pores in the nuclear membrane are way too small to let the DNA through. Thats were messengerRNA(mRNA) and reverse transcriptase come in. Between the two of them the take a copy of a small segment of DNA and carry it out to the Rough Endoplasmic Reticulum(Rough ER) which takes that small genetic blueprint and creates a series of amino acids from it. When they are linked together amino acids are proteins, proteins are pretty much everything you're build up from in one way or another. This protein then makes its way to the smooth ER which packages it and sends it on its way out of hte cell.
I find this process incredible. Its one of the fundamental requirements for life and it happens in much of our body every millisecond.
Monday, 5 May 2008
In Need of Help?
By now everyone has heard About This. My first reaction was a sense of pitty. No human being could do what that man did and be mentally stable. Under Austrian law this man wouldnt be going to a psychiatric facility he'd just be lumped together with all the other criminals.
Then I heard the interviews with his neighbours. He used to go to a local coffee shop and socialise. Most mentally ill people in a situation like this have a hard time distinguishing between right and wrong. They dont believe what they are doing is wrong. However in all his socialising there is no evidence he told anyone about the children locked in his cellar. This suggests he knew it was wrong. Does this change the punishment he should receive?
I have two beliefs when it comes to mentally ill criminals. Either they should be in a psychiatric facility for the rest of their lives. Rehabilitation is not an option. Or they should be executed, this is a financially efficient way of removing them from society.
Then I heard the interviews with his neighbours. He used to go to a local coffee shop and socialise. Most mentally ill people in a situation like this have a hard time distinguishing between right and wrong. They dont believe what they are doing is wrong. However in all his socialising there is no evidence he told anyone about the children locked in his cellar. This suggests he knew it was wrong. Does this change the punishment he should receive?
I have two beliefs when it comes to mentally ill criminals. Either they should be in a psychiatric facility for the rest of their lives. Rehabilitation is not an option. Or they should be executed, this is a financially efficient way of removing them from society.
Saturday, 3 May 2008
X-Linked
I was going to post this as a comment in reply to the comment by darkwinter on my last post, however I feel I have enough material to make a whole new post from it.
Interestingly genetics advancements mean a parent can now choose the gender of a foetus. This is of particular interest to people like myself with X-Linked Conditions. To understand this you have to appreciate that males have an X chromosome and a Y chromosome whereas females are XX.
In my case I have a faulty gene in my X chromosome. This fault manifests itself as Retinitis Pigmentosa(RP). If I have a son I will be passing my Y chromosome which does not carry the faulty gene. My son will not contract this condition. However if I have a daughter I will be passing on my only X chromosome, which is faulty. This means my daughter will carry the defect. However as she has two X chromosomes and a certain degree of error checking occurs my daughter will not contract RP she will merely carry it.
If my daughter has a child there is a 50% chance she will pass the defective gene on. As she will only contribute one of her two X chromosomes to the creation of the foetus. If she has a son and passes on the faulty X chromosome he will contract the condition.
As my ability to convey this information may be lacking I have drawn a terrible little diagram with the following key -
Underlined X chromosomes carry the gene for RP.
1. The faulty chromosome has to be carried for the creation of a daughter. As a female requires an X from each parent. The daughter is a carrier
2. A son obtains his X chromosome from his mother. The fathers Y chromosome is unaffected. Assuming the mother is not a carrier of the condition the son will be unaffected.
3. There is a 50% chance a mother will pass the condition to the daughter as the mother only contributes one of the two X chromosomes to her daughter. In this case the chromosome is carried.
4. Again there is a 50% chance the son will inherit the faulty X chromosome. In this case he inherits the chromosome without the fault and is thus unaffected.
5 and 6. As the parent did not inherit the condition the faulty chromosome will not be passed down this line.
People often consider me weird for my fascination with my condition. However it is incredible. Despite the 50% odds every time a female with the gene procreates this condition is still passed on potentially thousands of years after the first mutation occurred. The fact we can now not only understand how this inheritance occurs but exactly which gene is effected is something I find terribly exciting. In my case the gene fault is the deletion of a single base pair. Two tiny nucleotides were removed from this gene generations ago. When you consider how many nucleotides are in the human genome its hard not to find this breathtakingly impressive.
Interestingly genetics advancements mean a parent can now choose the gender of a foetus. This is of particular interest to people like myself with X-Linked Conditions. To understand this you have to appreciate that males have an X chromosome and a Y chromosome whereas females are XX.
In my case I have a faulty gene in my X chromosome. This fault manifests itself as Retinitis Pigmentosa(RP). If I have a son I will be passing my Y chromosome which does not carry the faulty gene. My son will not contract this condition. However if I have a daughter I will be passing on my only X chromosome, which is faulty. This means my daughter will carry the defect. However as she has two X chromosomes and a certain degree of error checking occurs my daughter will not contract RP she will merely carry it.
If my daughter has a child there is a 50% chance she will pass the defective gene on. As she will only contribute one of her two X chromosomes to the creation of the foetus. If she has a son and passes on the faulty X chromosome he will contract the condition.
As my ability to convey this information may be lacking I have drawn a terrible little diagram with the following key -
Underlined X chromosomes carry the gene for RP.
1. The faulty chromosome has to be carried for the creation of a daughter. As a female requires an X from each parent. The daughter is a carrier
2. A son obtains his X chromosome from his mother. The fathers Y chromosome is unaffected. Assuming the mother is not a carrier of the condition the son will be unaffected.
3. There is a 50% chance a mother will pass the condition to the daughter as the mother only contributes one of the two X chromosomes to her daughter. In this case the chromosome is carried.
4. Again there is a 50% chance the son will inherit the faulty X chromosome. In this case he inherits the chromosome without the fault and is thus unaffected.
5 and 6. As the parent did not inherit the condition the faulty chromosome will not be passed down this line.
People often consider me weird for my fascination with my condition. However it is incredible. Despite the 50% odds every time a female with the gene procreates this condition is still passed on potentially thousands of years after the first mutation occurred. The fact we can now not only understand how this inheritance occurs but exactly which gene is effected is something I find terribly exciting. In my case the gene fault is the deletion of a single base pair. Two tiny nucleotides were removed from this gene generations ago. When you consider how many nucleotides are in the human genome its hard not to find this breathtakingly impressive.
Thursday, 1 May 2008
Parental Obligation
Just a quick post while I am waiting for my printer to finish with my latest assignment.
When the Human Genome Project cracked the code of life(a little emotive language to brighten your day) we developed the ever unspooling ability to design the genetic traits of our offspring. We can choose for them to have blue eyes, or brown hair. I even knew in a few generations It would be able to replace the defective gene that creates my condition (retinitis pigmentosa). When I first heard this I realised it wouldnt be long before this was exploited but I never Imagined in such despicable ways.
Members of the deaf community(not all but a large number of deaf organisations and individuals) petitioned the government to sanction IVF causing their future offspring to be deaf. They felt that having a child that could hear would create too large a communication barrier and cause a rift in 'normal family life'. How do they think the child will feel when (s)he finds out that the reason they have this massive disability is because of their parents selfishness. Surely its the natural desire of all parents for their children to be healthy physically and mentally. In my opinion creating a child with a deliberate defect should be considered criminal negligence both on the part of the parents and any scientists involved.
Fortunately in a rare show of ethical resolve the government refused to sanction such gene therapies.
The BBC and the Nursing Standard both report on this.
When the Human Genome Project cracked the code of life(a little emotive language to brighten your day) we developed the ever unspooling ability to design the genetic traits of our offspring. We can choose for them to have blue eyes, or brown hair. I even knew in a few generations It would be able to replace the defective gene that creates my condition (retinitis pigmentosa). When I first heard this I realised it wouldnt be long before this was exploited but I never Imagined in such despicable ways.
Members of the deaf community(not all but a large number of deaf organisations and individuals) petitioned the government to sanction IVF causing their future offspring to be deaf. They felt that having a child that could hear would create too large a communication barrier and cause a rift in 'normal family life'. How do they think the child will feel when (s)he finds out that the reason they have this massive disability is because of their parents selfishness. Surely its the natural desire of all parents for their children to be healthy physically and mentally. In my opinion creating a child with a deliberate defect should be considered criminal negligence both on the part of the parents and any scientists involved.
Fortunately in a rare show of ethical resolve the government refused to sanction such gene therapies.
The BBC and the Nursing Standard both report on this.
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