Imaging strategies of suspected acute colonic diverticulitis: how does it work?

Clinical scenario

A 66 yo man complains of left lower quadrant (LLQ) pain, anoressia and fever, it is the first time. The pain is acute, there is not vomit, temperature is 38°C. Abdomen is treatable, with severe pain and tenderness localized at LLQ , there is not history of prior abdominal surgery. Probably this patient suffers of an acute colonic diverticulitis (ACD).

Is Computer Thomography (CT) the imaging procedure of choice for this patient? 

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Diagnosis of diverticulitis with hands and blood tests. Is it a good idea?

Clinical Scenario

A 66 yo man complains of left lower quadrant (LLQ) abdominal pain from 4/5 hours. The pain is described as crampy initially, than continuous, there is not vomit. Temperature is 37.5°C. Abdomen is treatable, with moderate pain and tenderness localized at LLQ , there is not history of prior abdominal surgery. 

ED US excluded the specter of an AAA.

WBC 13.000/μl

CPR: 51 mg/L

Probably this patient suffers of an acute diverticulitis. 

Is it an urgent imaging necessary to confirm the diagnosis? 

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Is chest X ray necessary to rule out PNX after thoracic maneuvers?

Clinical Scenario

It’s a busy day in ED this morning. 

The first patient refers dyspnoea, he has an advanced pulmonary neoplasia, ultrasound and chest x-ray confirm that the left zone is occupated by a pleural effusion. The thoracentesis removes about 1.5 liter of fluid, the patient breathes easily.

The second patient is 65 yo, he has pneumonia, he is septic, it’s impossible to find a vein, the right internal jugular vein is identified by ultrasound and the catheterization is performed without any problem.   

Is it necessary in this cases to perform a chest  X-ray to rule out a PNX?

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Pleuritic Pain, the end of the saga...

Clinical Scenario

A 33 y/o woman, comes to the ED because of a sudden emithorax pain on the left in basal region. The pain is described as stabbing, well localized, it worsen with inspirium …a pleuritic pain, no cough, no fever, not hemoptysis. She smokes, she does not take any medication. 

Chest x ray is normal. You receive blood test: WBC 7.500/mcL, CRP 20 mg/dl , D-dimer 603 ng/ml

We have seen in the previous post that we can’t rule out the possibility to find a radio-occult lesion based on our blood test, but on the other hand specificity is poor, so what are we looking for?

What does pleuritic pain means? 

If you ask wikipedia… the answer is frightful…

What if you ask to your probe?

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Can we fight against Pulmonary Embolism using the LR’s arrows?

Clinical Scenario

A 80 y/o woman presented to the ED for dyspnoea.

She underwent a knee replacement 2 weeks ago, RR is 24, O2 saturation is 88%. HR is 90, the knee is edematous.

You are going to hunt a pulmonary embolism (PE)

While you phone the radiologist for a thorax CT scan you have an idea:

Can a compression ultrasonography (CUS) helps to avoid a CT?

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Can Ultrasound rule out a pneumothorax?

Clinical Scenario

You are allerted for a level 3 trauma from the mountain, a cyclist has fallen going down hill.

You prepar the shock room with everything you may need, dress up, and wait.

A 25 y/o cyclist arrives completely immobilized, you immidiately start to  perform ABCDE as you learned in your recent ATLS course (you feel confident).

First stop is a possible problem in “B” (breathing): he has an ecchimosis on the right emithorax, not crepitation, maybe there is a less vescicular murmur on the same side, but you are not sure (the shock room is very crowded an noisy!), he is slightely tachypnoic (RR is 24), O2 saturation is 96%. …you go on….in “E” (Exposure) you find an exposed, bleeding, thigh bone fracture that surly is going to need surgery, at the moment you stop the bleeding, stabilize, allert orthopedic…ect…

FAST is normal. You ask for X-Ray : anteroposterior (AP) chest x-ray, pelvis and thigh bone. Confirmed exposed fracture, no signs of pneumothorax, surgery room is ready…

You recently have reeded the previous post and you don't feel confident about a negative thorax x ray, so you decide to “extend” your FAST and on the right emithorax you find a "lung point"...

are you going to let this patient be intubated?

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Is CRP correlated to CT result in the evaluation of abdominal pain?

A 74 yo/man complained of diffuse abdominal pain. The pain was intermittent and accompained by vomiting. He has no history of abdominal pain or abdominal surgery.

On examinations the patient presented non icteric, afebrile, not tachicardic. 

The abdomen was mildly distensed with midline tenderness. 

The US evidenced a normal aorta diameter. 

Abdominal x ray showed non specific bowel gas pattern. 

CRP value was 7 mg/L.

The radiologist says it is a little value to perform an abdominal CT, we see tomorrow…..

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Does Murphy’s sign and sonographic Murphy sign have the same clinical utility?

A 40 yo woman presented to the ED with upper quadrant pain since three hours after eating a tasty pizza. She is overweight, she presents feverish (38°C) her skin is nonicteric. The abdomen is soft, there is tenderness on the upper right quadrant, you perform a deep palpation in the subcostal area, and the patient stops breathing for pain. 

Is Murphy’s sign useful to make diagnosis of cholecystitis? What about the sonographic Murphy’s sign?

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Diagnosis of pneumonia. Is it the time for a combined imaging strategy?

A 80 yo man is brought from an assisted-living facility because of fever, productive cough, tachycardia and dyspnoea. 

He has a history of dementia and hypertension.

He is cachectic, you hear ronchi on the left side. 

How should you approach this patient?

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Septic Arthritis and Arthrocentesis

A 33 y/o male comes to the ED for fever, knee swelling and pain.
He has a history of joint surgery because of trauma, and prothesis, dating 4 years before.
He is HIV positive
He presents feverish (38°C), the left knee is swollen and hot.
WBC 34.000/μL, CRP 109 mg/L, PCT 0,05 ng/mL.
As we have seen in previous post, history, clinical examination and serum test are not useful to rule out or in a septic arthritis. It’s time to perform arthrocentesis: sWBC: 60x109, sLactate: 10 mmol/L


Are this findings useful?

Conclusion 

Although arthrocentesis is not a risk-free procedure, synovial fluid analysis is essential for the diagnosis. 

sWBC count has been studied in several trials but a significant heterogeneity was noted so it should not be used in isolation to rule in or rule out the diagnosis of septic arthritis, anyway it should augment the entire clinical evaluation.

Synovial lactate, instead, has consistently demonstrated desirable diagnostic properties to rule in septic arthritis using a threshold of >10 mmol ⁄ L. 

Bibliography 

C. R. Carpenter et al;

Evidence-based Diagnostics: Adult Septic Arthritis

Acad Emerg Med Aug 2011, vol 18 n 8. 

see previous...


Ilenia Spallino

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Soft tissue abscess: clinical plus ultrasound evaluation

Male 65 y/o, he complains pain and swelling in left groin, he has history of hypertension. He has not fever. Clinical examination shows swelling, skin is hot and  eritematous.






Is it an abscess, a cellulitis or something else? 

Conclusion 

To use ultrasound on eritematous and swelling skin is very helpful 

Abscesses presents as a spherical structure with “pus in movement”.  

Celluliti’s morphology, instead, has a “cooblestoning effect”, with diffuse hyperechogenicity of subcutaneous fat.

Ultrasonography is a useful adjunct to clinical evaluation of soft tissue infection, it increases diagnostic accuracy and guides treatment decision.

Bibliography 

BT Squire, JC Fox, C Anderson

ABSCESS: applied bedside sonography for convenient evaluation of superficial soft tissue infections

Acad Emerg Med July 2005, Vol. 12, No. 7 

DW Struk, PL Munk

Imaging of softs tissue infections

Radiol Clin of N Am vol 39 n2 Mar 2001

see previous...

Ciro Paolillo

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Acute dyspnoea and Lung Ultrasound

It’s a dark night when a red code arrive at the ED by ambulance. 

Paramedics tell you: “called for acute dyspnoea, I think it’s a COPD exacerbation, he is wheezing, I gave him bronchodilators and steroids, but he is worsening”.

He has a history of  COPD and hypertension. 

He presents sweaty, dyspneic, arterial pressure is high (220/110).

Physical examination is normal except for wheezing.

AP Chest X ray shows no signs of congestion.

Can you exclude an acute pulmonary oedema? 

Or something else than your stethoscope and x ray is needing? 

Conclusion 

Lung ultrasond has been shown to have greater diagnostic accuracy in differentiating the causes of acute dyspnoea in emergency settings compared with the traditional methods commonly employed in emergency departments (ED).

Its major advantages, particularly over radiographic tech- niques, are the absence of ionising radiation, speed and the fact that it is unaffected by the patient’s breath-hold limita- tions or agitation. 

The reliability of ULCs makes this method appealing for use in the emergency care setting. ULCs provide a direct, morphological, readily apparent imaging of abnormal increases in lung water. Recognition of diffuse interstitial involvement through B-line detection allows some pulmonary diseases to be rapidly ruled out, in particular, COPD exacerbation, which is one of the most common causes of acute dyspnoea. 

Bibliography 

Lichtenstein D, Mezière G (1998) 

A lung ultrasound sign allowing bedside distinction between pulmonary edema and COPD: the comet tail artifact. 

Intensive Care Med 24:1331–1334

L. Cardinale G. Volpicelli F. Binello G. Garofalo S.M. Priola A. Veltri C. Fava

Clinical application of lung ultrasound in patients with acute dyspnoea: differential diagnosis between cardiogenic and pulmonary causes

Radiol med (2009) 114:1053–1064

Lichtenstein DA (2007) 

Ultrasound in the management of thoracic disease. 

Crit Care Med 35:S250–S261

To be continued...

Ilenia Spallino

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