Mini Anatomy Lesson – William’s Wound!

Hello, anatomy students!

Good to see you again so soon. 😉

Today’s lesson explores the horrific circumstances leading to an intended amputation of William’s forearm.

Just so you know what to expect, this lesson does contain a number of rather gruesome images!

William’s wound appears in Outlander episode 704,  “A Most Uncomfortable Woman.”

A short recap: William hastily rides through the Great Dismal Swamp. His steed, Jupiter, is startled by a snake, which looks very much like a copperhead to me!

Jupiter unseats William who tumbles down a steep hillside hitting a fallen tree snag during his rapid descent.

As William comes to rest, he assesses the damage to his arm. Oh, dear,! A branch broke off the snag and buried itself into his right forearm. Ouch! 😱

Being of Fraser blood, he grits his teeth and pulls it out! 😬 Then, using his stock as a bandage, he wraps the wound under pressure and moves forward with his mission. This time, on foot, as Jupiter has hightailed it leaving William alone and without supplies or the notes from Captain Richardson! 😳 

Later,  he hears a sound. Looking up, he spies an “Indian” who speaks a Scot’s version of the King’s English. 😜  Wolf’s Brother (Ian Murray Jr.) in the flesh!

A very nice chit-chat ensues as they exchange bona fides.  Then Ian spies Williams’s wound. Um….best get that taken care of. Because, by now that oozing wound looks pretty yucky! 🤢

Ian sets about building a wee fire and boils a pot of water. Then he crouches beside William, pulls his knife from its sheath, and begins to free the wound of several splinters. Ouch! 😮

The blood clots are well done. 👍🏻

Then he pours boiling/hot water over the wound to try to cleanse and perhaps sterilize it? Oh, boy, that hurts! 🤯

Ian hustles William to the cabin of one Dr. Denzel Hunter and  his sister, Rachael. They help William onto a table and Denzel takes a quick keek. Oh, dear, that looks bad. Rachael, fetch me the saw!

After some protestations from Ian and William (it is his forearm, after all!), Dr. Hunter begins to saw. Suddenly, pus oozes from the wound and Denzel declares that the bile has been freed and there will be no need for a hack job today! 🪚

Much later, Williams shares his travail with fellow soldiers. Here, from “A Breath of Snow and Ashes:”

Wandered round the Great Dismal Swamp for three days in a fever,” he said. “Some … Indians found me and got me to a doctor. I nearly died, and”–he lowered his brows and gave Zeb a piercing look–“the doctor was just about to cut off my arm, when the abscess burst and he cauterized it. You might not be so lucky, hey?”

Sometime later, Rachel tells William his scar has healed well. It looks like the star that guided the wisemen to the Christ child and it suits him. In the book, his scar looks like a comet.

A quote from “A Breath of Snow and Ashes:”

‘The wound was still red and puckered, the skin around it unpleasantly white and moist. It was, however, undoubtedly healing; the arm was no longer swollen, and the ominous red streaks had disappeared. “Well,” she said consideringly, “it’s a fine scar, I think. Well knit, and rather pretty.” 


Anatomy and Pathology: Now that the recap is over, let’s discuss the pathology of William’s wound. You may recall, that pathology, which literally translates to “knowledge of sorrow,” is abnormal anatomy, so we are not far off the mark. 🤓

I propose we review one issue at a time, so here we go!

The Accident:  I have been asked if I think the accident was plausible. My short answer is, yes. My reasoning is that William is a large man, rolling downhill, rapidly. All that weight with an extended arm and yes, it is possible. 🤔

Believe it or not, this issue is covered by Newton’s (next image) second law of motion which states that F = ma, in which net force is equal to mass times acceleration due to gravity.

Stated more plainly, the force with which William’s extended arm struck the wooded spike equals William’s mass times acceleration rolling downhill.

I asked my physicist son, Diedrich, to help with variables such as hypothetical mass, rate of descent, incline, size of branch, etc. He did the calculations and William  struck the branch with roughly 163 ft-lbs of force!  Consider that this force was expended onto a stick no more than 1” in diameter. Well, suffice it to say, that force is more than sufficient to snap the branch, break the skin, pierce the muscle, and even fracture one or both forearm bones (radius and ulna)! 😱

Make sense? Gooood! 🤗

Penetrating Wound: Poor William suffers what pathologists categorized as a penetrating wound. This occurs when a sharp object pierces the skin and creates a single opening into either tissues or a body cavity.  Clearly, there is one wound and the tissues in this instance are the meaty flexor muscles of his forearm. 💪🏻

Our flexor forearm (the palm side) houses eight muscles (15% of us have only seven). The spike would have driven deep into probably 2-3 of these muscles. This means any bacteria or other pathogens on the swampy branch would have sunk deeply into the tissues. This is why the wound became infected.

Inflammation: Ian unwraps William’s arm and spies a swollen,red, painful wound that will feel hot to the touch. These are four of the cardinal signs of acute inflammation, the body’s common response to injury and  infection.

Inflammation is heralded by five cardinal signs, four were described 2,000 years ago by Celsius. These are:

  • rubor (redness)
  • calor (heat)
  • tumor (swelling)
  • dolor (pain)

and….

  • functio laesa (loss of function) the fifth cardinal sign was added 200 years later by Galen, surgeon to Roman emperor, Marcus Aurelius.

    Does William’s Wound show all five cardinal signs of acute inflammation? Well, yes, yes it does! It is painful, swollen, red, hot, and he has lost normal use of the forearm. 

A current day example: The image below shows acute inflammation of the great toe (hallux) due to an ingrown toenail. The toe is red, swollen, warm, sore, and difficult to use.

Cleaning the Wound: I have to say, Ian was caring and compassionate to clean the splinters from William’s Arm.

But, I must protest! Ian has seen Auntie Claire take care of enough trauma to know that he should either cauterize that knife tip in the fire, or plunge it into the boiling water for a bit. Inserting the tip of a  dirty blade will introduce more pathogens into the already infected wound! 

And, pouring boiling/hot water into the wound? That  isn’t much help, either and was traumatic for William. Much better to let the water cool a bit and then cleanse the wound with the “sterilized “ liquid.

The amputation: When I saw this, I thought. Um……No! Denzel grabs his amputation saw and starts sawing away on William’s arm!  Now, this enactment exactly follows what is recorded  in “A Breath of Snow and Ashes:”

He had—he was told sometime after the fact—narrowly escaped loss of the arm: Dr. Hunter had grasped it and placed his amputation saw just above the wound, only to have the abscess that had formed below it burst in his hand. Seeing this, the doctor had hastily drained the wound, packed it with garlic and comfrey, and prayed—to good effect.

It was very dramatic, but you should know that a doctor with training like Denzel’s would not start sawing on skin. The saw teeth will rip and tear skin and muscle causing even more pain and morbidity for the patient. Instead, a practitioner used an amputation knife to slice the flesh around the bone and then saw through the bone. Below is an example of a typical amputation knife and an amputation saw of the time. 🔪🪚

As horrifying as this sounds, a capable practitioner could remove a limb very swiftly this way, reducing the trauma to the sufferer.

Finally, as Denzel puts pressure on the limb, pus bursts from the deep lying abscess. After removing the pus, the wound was carefully cleaned and wrapped..

Pus is a  thick yellowish or greenish opaque liquid produced in tissues infected with pyogenic bacteria such as Streptococcus or Staphylococcus (Not all infections elicit pus formation). Pus is formed of dead white blood cells, bacteria, tissue debris, and serum.

The term pus derives from the Latin and it has been used since the 14th C. Again, since Denzel is a well-trained physician, he would have likely used the term pus rather than bile.

Finally let’s consider William’s scar. Here, he recounts his travail to fellow soldiers…..from “A Breath of Snow and Ashes:”

Look,” he said, displaying the long, comet-shaped scar on his forearm. “That’s what happens when you get an abscess.”

Both Zeb and the doctor peered at the scar, impressed. It had been a splinter wound, he told them, caused by a lightning-struck tree.

Big, kudos to the FX folks. I thought the slightly reddened, puckered, and contracted scar was believable. Well done!

I hope you enjoyed this review of William’s Wound.

Until we meet again, fare thee well! 

The deeply grateful,

Outlander Anatomist

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Photo creds: Sony/Starz, www.myclevelandclinic.org, www.en.Wikipedia.org, www.teachmeanatomy.info, www.teachmesurgery.com

Anatomy Mini-Lesson – Popliteal Aneurysm!

Greetings Outlander anatomy students!

Much time has passed since my last post partly because I am nursing broken bones of my left ankle. I am working off an iPad, instead of my desktop computer, so it is slow going. 😱

Today’s lesson details Mr. Walter Woodcock’s dilemma as presented in Outlander episode 705, Singapore.

You will recall, Walter lies in the infirmary at Fort Ticonderoga with a significant injury to his right foot. The wound has turned gangrenous so an amputation is required.

Claire arrives to witness a medical dispute between Dr. Denzel Hunter and the pompous, Lieutenant Stactoe.

Curious Claire asks, what is going on? 🤔

Denzel recommends an above-knee amputation for Walter. Stactoe is adamant that a below-knee amputation makes for a more functional limb.

Stactoe is correct that in most circumstances, every attempt is made to salvage as much of a limb as is possible.

However, Denzel explains that Walter has a popliteal aneurysm, thus, an above-the-knee amputation is necessary! Claire palpates Walter’s calf and agrees with Denny.

Oh, oh! This changes everything! 🤔

There ensues a wee strammash when Stactoe says Claire will not use boiling water on HIS instruments. This is a direct quote from Diana’s An Echo in the Bone:

You will ruin the temper of the metal, subjecting it to boiling water!”

“No,” I said, keeping my own temper—for the moment. “Hot water will do nothing but clean it. And I will not use a dirty blade on this man.”

“Oh, won’t you?” Something like satisfaction glimmered in his eyes, and he clutched the blade protectively to his bosom.”

In the episode, Stactoe stomps off. But, no worries, Denzel to the rescue with his own set of fine surgical instruments!

To understand the implications of a popliteal artery aneurysm, let’s look at the anatomy of the arterial supply to the knee.

Essentially all of the lower limb is supplied by the huge femoral artery which begins at the groin and descends through the front of thigh. Near the top of the knee, the artery passes to the back of the knee and is renamed the popliteal artery (next figure). It then descends behind the knee joint. At the bottom of the joint, it splits into two and then into a third artery, all of which receive new names and supply lower leg and foot.

The hollow behind the knee joint is the popliteal fossa.

Try This:  Make a fist, bend opposite knee slightly, and tuck your fist into the hollow behind your knee. This is the popliteal fossa. Remove your fist and insert middle and ring fingers into the hollow. Press. You may be able to feel the pulsing of the popliteal artery in the popliteal fossa.

Feel it? Good job, students! 🤗

   
Next. The aneurysm! 🤓

A popliteal artery aneurysm, known by the acronym PAA, is a weak spot in the wall of the popliteal artery. Pressure exerted by arterial blood causes the weak spot to balloon into a palpable bulge behind the knee joint. This is of concern because if the aneurysm should burst, the blood loss would be difficult to control especially in an amputee.

Some causes of PAA are:

  • Atherosclerosis
  • High blood pressure
  • Wear and tear of the popliteal artery due to over use of knee joint
  • Weakening of the artery wall

The image show a couple different types of PAA.


Now, back to the episode!

Claire palpates Walter’s leg and agrees with Denzel. An above-knee amputation is best to avoid the aneurysm bursting with uncontrolled hemorrhaging.

A clear view of his damaged, gangrenous foot can be seen in the next image.

Unfortunately, Claire places her hands on either side of his calf. She cannot feel a PAA in this location because there is no popliteal artery behind the calf. Her hands should be up in the hollow of the knee.

Nevertheless, she gets an A+ for trying! 🤩

Also, in real life, the stench of gangrene would likely require them to mask and use some type of ointment under the nose to distract from the odor. 😮

And, today, imaging modalities would be used to determine the type and extent of a PAA.

In the final scene with Walter, Claire breaks the sad news that his condition does not permit him to be evacuated with the other patients.  He is to be left behind. 😢

Claire has a wonderful bedside manner which comes from her compassionate and caring heart. Hopefully,  the British will treat Walter well. 🤞🏻

Mercy! 😉

I hope you enjoyed today’s lesson. Just remember, if you ever feel a pulsing bulge behind  the knee, make an appointment swiftly or get into urgent care. A PAA is no joke!

The deeply grateful,

Outlander Anatomist

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Photo creds: Sony/Starz, www.myclevelandclinic.org, www.uptodate.com

Mini Anatomy Lesson: Claire’s Beating Heart

 

Greetings all anatomy students. There has been a dry spell of lessons this summer while I attended to blueberry crops and fruit trees! Berries are now done for the year and time to return to Outlander. Yay!

So, let’s get right to it.

During Episode 606, The World Turned Upside Down, Claire becomes deathly ill, not from what ails the MacNiel family, but from Malva Christie poisoning! 😈 😳

During an intense fever dream, Claire has a vision of roiling clouds and an amoeba. But then, her hands cradle something red and pulsing –  her beating heart in this startling and somewhat gruesome image: 

Fortunately, the show’s FX provides me with a splendid opportunity to teach students about the heart, a complex and essential organ. Oh, goodie! 😜

Learn: So, let’s study the heart!

This Mini Lesson will cover heart size, shape, position, apex, base, chambers, valves, cardiac muscle, and blood flow.  Because the heart is fairly complex, I will try to keep the explanations as compact and useful as possible. 🤓

Size: First, how big is the human heart? The human heart is roughly the size of the person’s closed fist. ✊🏻 Thus, a man’s heart is usually slightly larger than a woman’s and both are larger than a child’s. 

Try This: Make a fist and take a keek at it. It is likely close to the size of your own heart. If you are female, ask a male family member or friend to make a fist and explain what it means. Ditto for a child in your life.

Fun Fact #1:  We sometimes compliment a generous person saying they having a “big heart.” But this is just a figure of speech. One doesn’t really want a big heart because a smaller heart is usually a healthier heart.  Interestingly, people who exercise regularly tend to have smaller hearts that beat more efficiently. However, recent studies show some premier athletes who vigorously engage in prolonged exercise may have a slight enlargement of the heart muscle, but this is a somewhat unique situation.

Shape: What shape is the heart? I think it is worth while to point out that the heart is not shaped like a Valentine! 😉 Overall, its shape is so complex it is a bit challenging to explain. But, let me give it a try.

Alrighty then. If the heart is NOT shaped like a Valentine, what is its shape? Turns out, the heart is shaped something like a squat, plump hand iron without a handle! Yep. 👍🏻

Here it is from a frontal view.  The heart is outlined in black. It is a bit difficult to visualize because the heart is somewhat obscured by the many vessels leading to and from it.  (The right view shows the heart from behind)

Position: Now, exactly where does the heart reside in the body? It sits in the chest nestled between right and left lungs and just above the respiratory diaphragm (black line in next figure).

About 2/3 the heart lies behind the sternum (breast bone) and about 1/3 projects to the left of the sternum with a wee bit to the right.

The heart does have a point but it is not directed downward as seen in Episode 606 (and many other films), but toward a person’s left side – bear in mind the hand iron image! 

Apex: The point of the heart is its apex. The apex lies at the 5th intercostal space (between the 5th and 6th ribs), a little below the nipple (but, only if the breast is high). It is nearer the rib cage than the rest of the heart making the 5th intercostal space an important landmark for hearing the heart beat.

Base: The heart has a base but it is not the surface nearest the diaphragm, as one might expect.  Rather, the base is opposite the apex and lies nearer the right lung. 

 

Next is a closer view of the heart nestled between left and right lungs (shown in pale pink). The black arrow marks the apex of the heart and the red arrow marks its base.  Notice there is a distinct notch in the left lung to accommodate the apex; this is the cardiac notch. Again, the respiratory diaphragm is not shown in the image, but it lies directly under the heart.  

Chambers:  The human heart is divided into four chambers, each designed to receive blood. Two smaller chambers that form the base are the atria (pleural of atrium). The ventricles are two larger chambers that form the apex and sides of the heart. These chambers are named: right (R) and left (L) atria and R and L ventricles; each plays a unique role.

In the cut-away view below, we see all four chambers. Notice these are on opposite sides than the viewer’s heart because the image is designed for a health care practitioner viewing the heart of a patient. 🤒

In digital images, the chambers are usually color-coded. R atrium and R ventricle are blue whereas L atrium and L ventricle are red. This color designation indicates oxygen levels of the blood in each chamber. 

Bottom Line: The R two chambers are blue meaning they contain oxygen-poor blood that has just returned from the body (head, limbs, trunk). The L two chambers are red indicating they contain oxygen-rich blood that has just returned from right and left lungs.

Valves: The heart is also equipped with four valves which control the flow of blood passing through the chambers. If a valve is open, the blood flows through it. If a valve is closed, then blood cannot back flow. 🚫

The four valves are (next image):

    • Tricuspid Valve: This valve has three flaps and lies between R atrium and R ventricle. 
    • Mitral (Bicuspid) Valve: This valve has two flaps and lies between L atrium and L ventricle.
    • Pulmonary Valve: This valve has three pockets and lies between R ventricle and pulmonary artery (leading to the lungs).
    • Aortic Valve: This valve has three pockets and lies between left ventricle and aorta (carries blood to the head, limbs and trunk).

Cardiac Muscle: Just a note about heart (cardiac) muscle. Cardiac muscle is a special tissue only found in the heart. It has the ability to contract. It is thicker in the ventricles and thinner in the atria because the ventricles work harder to pump blood through the lungs and the body. The atria have thinner walls because their lighter workload consists of moving blood into their respective ventricles. Impulses from specialized cells stimulate cardiac muscle to rhythmically contract. We call this cycle of contraction and relaxation, the heart beat or cardic cycle.

 

OK, this ends the basic anatomy (although, there is much more). So let’s look as how the heart works.

Blood Flow: The heart is a pump. Similar to a pump that pushes water through a hose, the heart contracts rhythmically to pump blood through our vessels. As long as the heart continues to pump, blood continues to flow, delivering life-giving oxygen and nutrients to tissues and cells and removing carbon dioxide and waste products. 

Our hearts only work if our vessels form a continuous loop. If a vessel is cut or disrupted, then blood seeps through the opening; if blood loss is significant, then pressure falls and the heart can no longer pump normally. This explains why injury of a major vessel must be cared for ASAP.

FUN FACT #2: The human body contains some 60,000 miles of blood vessels – enough to encircle the earth 2.5 times! The heart works hard to pump blood through this vast network. 

FUN FACT #3: Each day the average heart beats 100,000+ times and pumps about 2,000 gallons of blood. In a 70-year lifetime, an average human heart beats more than 2.5 billion times! Super star! 🤩

How it Works: The heart is designed to receive blood via its atria and deliver blood via its ventricles (see image below). There really isn’t a simple way to describe this complex process but let’s give it a go! 👍🏻

    • R Atrium: Oxygen-poor blood from the body is delivered to the  R atrium via two large vessels (superior and inferior vena cavae). The R atrium contracts, the tricuspid valve opens, and blood pours from R atrium into R ventricle.
    • R Ventricle: The R ventricle contracts, the tricuspid valve closes, and blood exits through the pulmonary valve into the pulmonary artery whose branches deliver blood to R and L lungs (where it rids itself of carbon dioxide and picks up oxygen).
    • L Atrium: Oxygen-rich blood from the lungs is delivered to the left atrium by pulmonary veins. The L atrium contracts, the mitral valve opens, and blood pours from L atrium into L ventricle.
    • L Ventricle: The L ventricle contracts, the mitral valve closes, and blood exits through the aortic valve into the aorta whose branches deliver oxygen-rich blood to the body.

Cardiac Cycle: Now that you know what each side of the heart does, let’s see how the sides work together. Keeping in mind what each chamber does, understand that both atria contract simultaneously followed by both ventricles. The span of one heart beat to the next is the cardiac cycle.

Lub-Dub: The heart beat is described in anatomy and medicine as a lub-dub sound. Lub-dub sounds are close together followed by a brief pause. These sounds are caused by blood striking closed valve flaps.

    • Lub sound is caused by blood striking tricuspid and mitral valves as they close, simultaneously.
    • Dub sound is created by blood striking pulmonary and aortic valves as they close,  simultaneously.

This video offers a good representation of the cardiac cycle. Watch for the contraction of atria and ventricles and then the pause.  Also, watch valve flaps open and close as the heart chambers contract. In this animated film, only the cardiac vessels, which bring blood to and remove blood from the heart, are color-coded blue and red.

 https://youtu.be/ebzbKa32kuk

Try This: If you have a stethoscope, place it under the left fifth rib, in line with the nipple and listen for the lub-dub sounds. If you don’t have this tool, ask a partner or your child to lay down and place your ear in the same spot and try to hear the sounds of the valves closing. This is a totally awesome experience, especially if you know what it means! 

This animated video helps us to further understand the cardiac cycle –  you know the trope, “a picture is worth a thousand words.”

Fun Fact #4:  I suspect you all know that heart disease is the leading cause of death in men AND women, worldwide. But, recently it has been found that some Old Order Amish people have a rare genetic mutation which reduces the risk of heart disease by 35%! The gene has been duplicated in mice. Efforts are now underway to produce a drug that may reduce heart disease in the same way as the gene mutation. Let’s hope it works! 🤞🏻

I hope now you have a better understanding of and appreciation for your own heart. We sort of take it for granted that hearts will always be there working for us. But, the heart is susceptible to disease and is not an easy organ to understand. Its embryology is even more complex which accounts for the frequency of cardiac birth defects. You did well, though. Keep up the good work! 

Whew!  😅

Read about Claire’s beating heart in Diana’s sixth big book, “A Breath of Snow and Ashes.” This passage vividly describes her wild fever dreams as her body battles the infection planted by Malva. In Claire’s dream, her heart is the main character!

I seldom knew whether my eyes were open or closed, nor whether I woke or slept. I saw nothing but a roiling gray, turbulent and shot with red. The redness pulsed in veins and patches, shrouded in the cloud. I seized upon one crimson vein and followed its path, clinging to the track of its sullen glow amid the buffeting of thunder. The thunder grew louder as I penetrated deeper and deeper into the murk that boiled around me, becoming hideously regular, like the beating of a kettledrum, so that my ears rang with it, and I felt myself a hollow skin, tight-stretched, vibrating with each crash of sound. 

The source of it was now before me, throbbing so loudly that I felt I must shout, only to hear some other sound—but though I felt my lips draw back and my throat swell with effort, I heard nothing but the pounding. In desperation, I thrust my hands—if they were my hands—through the misty gray and seized some warm, moist object, very slippery, that throbbed, convulsing in my hands. 

I looked down and knew it all at once to be my own heart. 

I dropped it in horror, and it crawled away in a trail of reddish slime, shuddering with effort, the valves all opening and closing like the mouths of suffocating fish, each popping open with a hollow click, closing again with a small, meaty thud. 🤯

See Claire’s beating heart in Outlander Episode 606, “The World Turned Upside Down.”

Let’s all hope our hearts continue to serve us as long as possible. From my heart to yours! ♥️

The deeply grateful,

Outlander Anatomist

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Photo and Video Credits: Starz, Sony, Outlander Anatomy, www.arcreativemedia.com,  www.bemfi.fi, www.commons.wikimedia.org, www.covenanthealth.com, www.en.wikipedia.org, garmentsteamerguide.com, www.heart.org, www.heartsearch.org.uk, www.Luxsontube.com, www.medlineplus.gov, www.slideplayer.com