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Physical Examinations II

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Abdominal Exam IV: Acute Abdominal Pain Assessment



Abdominal pain is a frequent presenting concern for physicians in both the emergency department and the office setting.

Acute abdominal pain is defined as the pain lasting for less than seven days. It should not be confused with acute abdomen, which refers to the abrupt onset of severe pain with features suggesting a surgically intervenable process. The differential diagnosis of acute abdominal pain is broad, thus clinicians must follow a systematic method when examining patients presenting this condition.

This video will begin with a review of the key anatomical locations and terminology needed to understand the physical findings of this exam. It will then go on to demonstrate how to conduct the general assessment in patients experiencing acute abdominal pain, followed by special maneuvers that one should perform if a specific pathology is suspected.

Before we get to the examination, let's briefly review some of the key anatomical locations that will help you interpret the findings during the exam. Terminology for describing the location of abdominal tenderness includes the right upper and lower quadrants, left upper and lower quadrants, and the epigastric, periumbilical, and hypogastric regions

A thorough examination requires an organized approach involving inspection, auscultation, percussion, and palpation, with each maneuver performed purposefully and with a clear mental representation of the anatomy. A helpful technique is to imagine a clock face with the xiphoid process at 12:00 and the pubic symphysis at 6:00. When palpating at 8:00, there is skin, muscle, cecum, appendix, and ureters. Performing the exam in this fashion assists in clinical reasoning and minimizes the chance of missing a pathology.

With this background information, let's start reviewing the steps of the physical exam to be performed when a patient complains of acute abdominal pain. The first step is to acquire a complete patient history, which will guide the whole procedure and the interpretation of its findings. Remind yourself that conditions outside of the abdomen such as pulmonary, cardiac, rectal, and genital disorders, can just as easily lead to abdominal pain as conditions inside the abdomen.

After taking the history, request the patient to put on a gown. While the patient is changing, wash your hands thoroughly. Upon re-entering the room, review the patient's chart to check their vital signs. To start the exam, request the patient to lie down. Observe the position the patient occupies, as patients with peritonitis may prefer to lie still with flexed hips and knees.

Once the patient is comfortable, place a drape over the patient's lower body to cover the area below the pubic symphysis, and raise the gown to just below the breasts. Begin with inspection; note abdominal distension, skin color, bulges, scars, peristalsis or signs of poor perfusion such as mottling and visible pulsation.

After this initial visual inspection, ask the patient to point to the painful area. Then, instruct him or her to cough on purpose… If the patient is unable to do so, gently bump the examination table. Both these maneuvers help to localize the pain of peritonitis.

Next, auscultate the left lower quadrant, while applying light pressure. Absence of bowel sounds indicates an ileus, while high pitch sounds may suggest impending mechanical obstruction. For particularly anxious patients, palpating the four quadrants with graduated pressure using the diaphragm of the stethoscope can be a useful technique. Take note of the patient's face for signs of discomfort and at the same time feel the abdominal wall for rigidity.

Following auscultation, lightly percuss over the four quadrants. This can localize peritoneal pain and distinguish it from visceral pain. Continue with a moderate percussion stroke in the four quadrants, assessing for abnormal tympany suggesting free air or gas-filled bowel, or dullness suggesting fluid or mass. For patient with true peritoneal pain, this would not be performed because it is too painful.

Following percussion, begin with palpation. Place the open right hand gently on the abdomen with fingers slightly spread. Initially, use a light rocking motion as the patient breathes, feeling for abdominal wall rigidity. Feel each quadrant in this way, beginning farthest from the site of pain. Distracting the patient with conversation can serve to minimize voluntary guarding. Palpate again using moderate pressure with the finger pads, in a clockwise fashion. At the end, palpate the aorta, which is at the middle of the clock face. During the exam, you may be able to identify abnormal bulges due to abdominal wall hernia. If present, auscultate over the bulge and try to reduce it using your finger pads.

In selected patients, particularly those with lower quadrant pain or suspicion of gastrointestinal bleed, perform a rectal examination. In addition, if a male patient complains of lower abdominal pain, perform a testicular exam, and for female patients perform a pelvic exam.

After these general steps, in some cases, you might have to perform some special maneuvers if a specific pathology is suspected. If the patient is experiencing pain in the right upper quadrant, you should test for Murphy's sign-a maneuver used to detect presence of acute cholecystitis. Palpate the patient in the right mid-clavicular line, just below the liver edge. Ask the patient to take a deep breath, while applying deep pressure. Pain accompanied by cessation of inspiration suggests acute cholecystitis.

For right lower quadrant pain, assess for Rovsing's sign. Deeply palpate the left lower quadrant. While doing so, if the patient refers to pain in right lower quadrant, then one can suspect acute appendicitis. Another maneuver for the right lower quadrant pain is called the obturator sign. To perform this, passively flex the patient's right hip and knee to a 90° angle and internally rotate the hip. Pain in the right lower quadrant upon this movement may suggest acute appendicitis or a pelvic abscess.

Next, perform the test for psoas sign. Request the patient to flex their right thigh while you provide resistance. If this elicits lower abdominal pain, then one can suspect retrocecal appendicitis or psoas abscess. Alternatively, you can instruct the patient to occupy left lateral decubitus position, and while standing behind the patient, extend their thigh to unmask lower abdominal pain.

In order to diagnose abdominal wall pain, perform the Carnett test. While in supine position, ask the patient to identify the point of maximum pain, and palpate there with moderate pressure to elicit tenderness. Then, ask the patient to raise their shoulders off the bed as if they were doing a sit-up. This action contracts the abdominal wall muscles. Increased patient pain suggests abdominal wall pathology, while attenuated pain suggests intraperitoneal pathology.

Also, assess for splenomegaly in patients with left upper quadrant pain or signs of portal hypertension. And assess for ascites in patients with a suggestive history. These maneuvers are covered in detail in another video focusing on abdominal percussion. Lastly, if the patient is complaining of the lower abdominal or groin pain, you should assess for groin hernias. Symptomatic hernias can present with pain, an irreducible bulge, and signs of intestinal obstruction such as abdominal distension and vomiting.

To assess the groin hernia, it is best to request the patient to stand up. If the patient is unable to stand you may conduct the following steps while the patient is in the supine position. However, keep in mind, easily reducible hernias may be missed in supine position. Put gloves on and ask the patient to lift the front of their gown. Start by inspecting the areas of the inguinal and femoral canals. Before proceeding identify certain landmarks of this region…"Doctor's dialogue explaining the different landmarks"

After those surface landmarks are identified, ask the patient to turn his or her head to the side and cough. Observe for new bulging or increased size of an existing bulge. Next, using the finger pads of the right hand to examine the right side, palpate over the femoral canal and ask the patient to cough or bear down again to assess for femoral hernias. Once complete, palpate over the right inguinal canal. Again, ask the patient to cough or simply bear down as you feel for bulges. An expanding bulge felt toward the midpoint of the inguinal ligament is likely an indirect hernia, while a bulge felt near the pubic tubercle is more likely a direct hernia. In addition, auscultate over any bulges, noting if there are any bowel sounds.

Next, palpate the right external inguinal ring and distal inguinal canal. To do this, place your right index fingerpad onto the scrotum, just above the right testicle. Apply pressure and investigate the scrotum by following the spermatic cord superiorly and in the direction of the inguinal canal until the fingertip is just past the external inguinal ring. Then ask the patient to cough or bear down. A bulge felt at the fingertip may represent an indirect hernia, while a bulge felt on the side of the finger may represent a direct hernia. When the right side is complete, repeat the process on the left side, using your left hand. If a hernia is identified, attempt to gently reduce it, while the patient is in the supine or Trendelenburg position. Please avoid forceful reduction. At the end of the exam, discuss your findings with the patient.

You have just watched a JoVE video documenting the physical examination of a patient suffering from acute abdominal pain. You should now understand the systematic sequence of steps that a physician should follow in order to deduce the differential diagnosis of this type of pain. As always, thanks for watching!

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