Knee Dislocation, A Simple Guide To The Condition, Diagnosis, Treatment And Related Conditions
By Kenneth Kee
()
About this ebook
This book describes Knee Dislocation, Diagnosis and Treatment and Related Diseases
A knee dislocation occurs more specifically when the bones of the leg (the tibia and fibula) are shifted in relation to the bone in the thigh (femur).
The bones of the knee are kept together by strong bands of tissue called ligaments.
Each ligament is accountable for stabilizing the knee in a certain position.
For a knee dislocation to happen, these ligaments must tear.
A partial dislocation is called a subluxation.
In some injuries, the kneecap (patella) and its ligaments are also dislocated.
Improper or delayed treatment of a knee dislocation may cause the loss of the leg.
If the patient dislocates the knee, it means that the bones that come together at that joint have been forced out of place with great force.
It is an emergency and it is very painful.
Dislocated knees are rare, but they are serious.
A knee dislocation is unlike a patellar dislocation in which only the kneecap is detached from its groove at the end of the femur.
Causes
Knee dislocations are often the effect of a high-impact injury such as an automobile accident, severe or hard fall, and sports injuries.
Symptoms
There is a history of trauma and deformity of the knee.
There is knee pain and instability of the knee joint.
When the patient dislocates the knee, the patient may hear a popping sound.
These symptoms also are frequent:
1. Pain: It hurts a lot. The knee is in so much pain that the patient cannot move it.
2. Swelling: It is swollen and severely bruised.
3. Deformity: Parts of the knee look like they have been knocked out of place.
The most frequent symptoms of knee dislocation are the visible swelling and deformity of the knee joint
Appearance
a. No obvious deformity
50% of knee dislocations spontaneously reduce before arrival to ED
Knee dislocations may present with subtle signs of trauma (swelling, effusion, abrasions, ecchymosis)
b. Obvious deformity
The doctor should reduce immediately, especially if absent pulses are present.
"Dimple sign"- is the buttonholing of medial femoral condyle through the medial capsule.
This is an indicative of an irreducible posterolateral knee dislocation.
It is a contraindication to closed reduction due to risks of skin necrosis.
The lower extremity will often appear shortened and misaligned, and any movement of the joint will produce extreme pain.
Vascular examination
The priority is to exclude vascular injury on knee exam both before and after reduction
The doctor should palpate the dorsalis pedis and posterior tibial pulses on injured and contralateral side.
1. If pulses are present and normal:
It does not indicate the absence of arterial injury.
The Ankle-Brachial Index (ABI) is measured on all patients with suspected KD
The test compares the blood pressure at the ankle with the blood pressure at the arm.
a. If ABI >0.9
The doctor does serial examination (100% Negative Predictive Value)
b. If ABI
Kenneth Kee
Medical doctor since 1972.Started Kee Clinic in 1974 at 15 Holland Dr #03-102, relocated to 36 Holland Dr #01-10 in 2009.Did my M.Sc (Health Management ) in 1991 and Ph.D (Healthcare Administration) in 1993.Dr Kenneth Kee is still working as a family doctor at the age of 74However he has reduced his consultation hours to 3 hours in the morning and 2 hours inthe afternoon.He first started writing free blogs on medical disorders seen in the clinic in 2007 on http://kennethkee.blogspot.com.His purpose in writing these simple guides was for the health education of his patients which is also his dissertation for his Ph.D (Healthcare Administration). He then wrote an autobiography account of his journey as a medical student to family doctor on his other blog http://afamilydoctorstale.blogspot.comThis autobiography account “A Family Doctor’s Tale” was combined with his early “A Simple Guide to Medical Disorders” into a new Wordpress Blog “A Family Doctor’s Tale” on http://ken-med.com.From which many free articles from the blog was taken and put together into 1000 eBooks.He apologized for typos and spelling mistakes in his earlier books.He will endeavor to improve the writing in futures.Some people have complained that the simple guides are too simple.For their information they are made simple in order to educate the patients.The later books go into more details of medical disorders.He has published 1000 eBooks on various subjects on health, 1 autobiography of his medical journey, another on the autobiography of a Cancer survivor, 2 children stories and one how to study for his nephew and grand-daughter.The purpose of these simple guides is to educate patient on health disorders and not meant as textbooks.He does not do any night duty since 2000 ever since Dr Tan had his second stroke.His clinic is now relocated to the Buona Vista Community Centre.The 2 units of his original clinic are being demolished to make way for a new Shopping Mall.He is now doing some blogging and internet surfing (bulletin boards since the 1980's) startingwith the Apple computer and going to PC.The entire PC is upgraded by himself from XT to the present Pentium duo core.The present Intel i7 CPU is out of reach at the moment because the CPU is still expensive.He is also into DIY changing his own toilet cistern and other electric appliance.His hunger for knowledge has not abated and he is a lifelong learner.The children have all grown up and there are 2 grandchildren who are even more technically advanced than the grandfather where mobile phones are concerned.This book is taken from some of the many articles in his blog (now with 740 posts) A Family Doctor’s Tale.Dr Kee is the author of:"A Family Doctor's Tale""Life Lessons Learned From The Study And Practice Of Medicine""Case Notes From A Family Doctor"
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Knee Dislocation, A Simple Guide To The Condition, Diagnosis, Treatment And Related Conditions - Kenneth Kee
Knee Dislocation,
A
Simple
Guide
To
The Condition,
Diagnosis,
Treatment
And
Related Conditions
By
Dr Kenneth Kee
M.B.,B.S. (Singapore)
Ph.D (Healthcare Administration)
Copyright Kenneth Kee 2019 Smashwords Edition
Published by Kenneth Kee at Smashwords.com
Dedication
This book is dedicated
To my wife Dorothy
And my children
Carolyn, Grace
And Kelvin
This book describes Knee Dislocation, Diagnosis and Treatment and Related Diseases which is seen in some of my patients in my Family Clinic.
(What You Need to Treat Knee Dislocation)
This e-Book is licensed for your personal enjoyment only. This eBook may not be re-sold or given away to other people. If you would like to share this book with another person, please purchase an additional copy for each reader.
If you’re reading this book and did not purchase it, or it was not purchased for your use only, then please return to Smashwords.com and purchase your own copy.
Thank you for respecting the hard work of this author.
Introduction
I have been writing medical articles for my blog: http://kennethkee.blogspot.com (A Simple Guide to Medical Disorder) for the benefit of my patients since 2007.
My purpose in writing these simple guides was for the health education of my patients.
Health Education was also my dissertation for my Ph.D (Healthcare Administration).
I then wrote an autobiography account of my journey as a medical student to family doctor on my other blog: http://afamilydoctorstale.blogspot.com.
This autobiography account A Family Doctor’s Tale
was combined with my early A Simple Guide to Medical Disorders
into a new Wordpress Blog A Family Doctor’s Tale
on http://kenkee481.wordpress.com.
From which many free articles from the blog was taken and put together into 800 eBooks.
Some people have complained that the simple guides are too simple.
For their information they are made simple in order to educate the patients.
The later books go into more details of medical disorders.
The first chapter is always from my earlier blogs which unfortunately tends to have typos and spelling mistakes.
Since 2013, I have tried to improve my spelling and writing.
As I tried to bring the patient the latest information about a disorder or illness by reading the latest journals both online and offline, I find that I am learning more and improving on my own medical knowledge in diagnosis and treatment for my patients.
Just by writing all these simple guides I find that I have learned a lot from your reviews (good or bad), criticism and advice.
I am sorry for the repetitions in these simple guides as the second chapters onwards have new information as compared to my first chapter taken from my blog.
I also find repetition definitely help me and maybe some readers to remember the facts in the books more easily.
I apologize if these repetitions are irritating to some readers.
Chapter 1
Knee Dislocation
What Is a Knee Dislocation?
A knee dislocation happens when the bones (tibia and fibula below and femur above) that form the knee joint are out of place.
A knee dislocation occurs more specifically when the bones of the leg (the tibia and fibula) are shifted in relation to the bone in the thigh (femur).
The bones of the knee are kept together by strong bands of tissue called ligaments.
Each ligament is accountable for stabilizing the knee in a certain position.
For a knee dislocation to happen, these ligaments must tear.
A partial dislocation is called a subluxation.
In some injuries, the kneecap (patella) and its ligaments are also dislocated.
Improper or delayed treatment of a knee dislocation may cause the loss of the leg.
A knee dislocation is an infrequent but extremely serious injury in which the thigh bone (femur) and shin bone (tibia) misplace contact with each other.
If the patient dislocates the knee, it means that the bones that come together at that joint have been forced out of place with great force.
It is an emergency and it is very painful.
Dislocated knees are rare, but they are serious.
Other parts of the knee might also have been damaged at the same time.
A knee dislocation is unlike a patellar dislocation in which only the kneecap is detached from its groove at the end of the femur.
Incidence
Knee dislocations are 0.02% of orthopedic injuries
They are likely to be under reported as about 50% of these self-reduce and are misdiagnosed.
There