The Lung Float Test is a controversial autopsy procedure used in determining whether lungs have undergone respiration. It is also known as Hydrostatic Test or Docimasia or Raygat’s Test. It has historically been employed in cases of suspected infanticide to help determine whether or not an infant was stillborn. In the test, lungs that float in water are thought to have been aerated, while those that sink are presumed to indicate an absence of air.
The lung float test was described in the 1670s by Hungarian botanist Károly Rayger and first performed in 1681. German physician Johannes Schreyer performed a lung float test in 1690.
Procedure :
1. It is based on the fact that on breating, the volume of the lungs is increased, which more than compensates the weight of the additional blood, due to which their specific gravity is diminished. The specific gravity of the lungs before respiration varies from 1040 to 1050, and after respiration about 940.
2. A ligature is tied on the bronchi and lungs separated. Each lung individually is placed in water. If they float, each lung is cut into twelve to twenty pleces and placed in water. A small piece of liver may serve as control.
3. If the liver floats, the test is of no value. If these pieces float, they are each squeezed in between thumb and index finger under the surface of water, to see if any bubbles of air escape and if they still persist to float, or they are taken out of water, wrapped in a piece of cloth and squeezed by putting a weight to remove the tidal air.
Related Article :
- Neonatal Resuscitation
- Bifid Uvula
- Crying Cat Syndrome (Cri-du-Chat)
The lung float test was described in the 1670s by Hungarian botanist Károly Rayger and first performed in 1681. German physician Johannes Schreyer performed a lung float test in 1690.
Procedure :
1. It is based on the fact that on breating, the volume of the lungs is increased, which more than compensates the weight of the additional blood, due to which their specific gravity is diminished. The specific gravity of the lungs before respiration varies from 1040 to 1050, and after respiration about 940.
2. A ligature is tied on the bronchi and lungs separated. Each lung individually is placed in water. If they float, each lung is cut into twelve to twenty pleces and placed in water. A small piece of liver may serve as control.
3. If the liver floats, the test is of no value. If these pieces float, they are each squeezed in between thumb and index finger under the surface of water, to see if any bubbles of air escape and if they still persist to float, or they are taken out of water, wrapped in a piece of cloth and squeezed by putting a weight to remove the tidal air.
Related Article :
- Neonatal Resuscitation
- Bifid Uvula
- Crying Cat Syndrome (Cri-du-Chat)
4. The pieces are again placed in water, and if they continue to float, due to the presence of residual air, in indicates that respiration has taken place. If the pieces sink after pressure, respiration has not taken place.
5. If some pieces float while others sink, it show feeble respiration. A piece of lung is rolled gently between the finger and thumb very near to the ear. A cracking crepitant noise indicates a significant degree of respiratory activity.
6. The hydrostatic test is not of much value, because the lungs of the liveborn who have lived for few days may sink and the lungs of the stillborn may float.
The test is not absolute proof of live birth for the following reasons :
1. Unexpanded portions of lungs may float in water due to emphysema caused by putrefactive gases and artificial respiration.
2. Unexpanded portions of lungs, on the other hand, may sink in water owing to changes produced by the intra-uterine diseases, such as condolidation, oedema, congenital tumours etc.
3. The child may live for a considerable time after birth without respiration in asphyxia neonatorum.
4. Partial breathing such as ‘vagitus uterinus’ and ‘vagitus vaginalis’ hardly inflates the alveoli of lungs sufficiently to make the hydrostatic test positive.
5. It is more common to find the child taking breath after it’s head is out of the mother’s birth canal which constitutes birth in Bangladesh, but not according to English law.
References
1. WIKIPEDIA : https://en.wikipedia.org/wiki/Lung_float_test
2. FORENSIC MEDICINE : http://medicalsolution2122.blogspot.com/2015/02/hydrostatic-testraygats-test.html.
Related Article :
- Neonatal Resuscitation
- Bifid Uvula
- Crying Cat Syndrome (Cri-du-Chat)
I was able to overcome senile dementia via a complete naturopathic process.
ReplyDeleteAbout two years ago, when I was 56, I started feeling foggy and had occasional memory lapses. My wife, Mary, started to notice it, too, but I also have hearing issues so she thought that was the problem. My memory problems worsened very gradually over the years, and we lived with it, compensating as needed. I became less social. After some months thereafter, it got to the point where we couldn’t keep making excuses or ignoring it. I had gone from doing our grocery shopping without a list to going with a list, to having the list but not buying what was on it.
Mary went online to do some research, and it was during this period we had been fortunate enough to come across Dr. Utu Herbal Cure: an African herbalist and witch doctor whose professional works had majored on the eradication of certain viral conditions, especially dementia, ( improving the memory capacity positively), via a traditional, naturopathic process and distinguished diet plan. It was by the administration of this herbal specialist that I had been able to improve my condition for better. So to say, the encounter with the above-mentioned herbal practitioner was the first time we ever heard there was something that possibly can be done to improve my memory functionality.
By the existence of such an encounter, I was able to learn of the new approach by which this herbalist successfully treated dementia conditions, which included a distinguished herbal therapy and lifestyle changes of which I had undergone to a tremendous, positive effect.
It was after the completion of the herbal therapy I had started to experience a great deal of cognitive improvement when it came to rational decision making.
In brief, I was able to go through the dreadful hollows of senile dementia without any further hazardous damage to my health condition, and within a short period. Had it not been for the support of my wife, of whom had encouraged me to undergo the above-mentioned therapy and that of the herbal practitioner of whom now happens to be benefactor - I would have been long exposed to the further perils of this condition and of which had been apt to result to a calamitous end.
I would also wish for the same positiveness upon patients who may happen to be suffering from this debilitating disease, and would warmly beseech them to find a confidant like this herbal specialist with whose professional services I was able to attain a divine recovery.
For further information concerning this African traditional cure for Alzheimer's disease; feel free to contact Dr. Utu directly via email: drutuherbalcure@gmail.com
Post a Comment