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Abdominal Trauma: Dealing with the Damage

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Abdominal Trauma: Dealing with the Damage Abdominal trauma: Dealing with the damage Hidden in the abdomen, life-threatening injuries can elude detection. Find out how to evaluate your patient’s condition and prevent further harm. By Cynthia Blank-Reid, RN, CEN, MSN Often involving multiple injuries, abdominal trauma can 0.9% sodium chloride or lactated Ringer’s solution, ac- lead to hemorrhage, hypovolemic shock, and death. Yet cording to facility protocol. even a serious, life-threatening abdominal injury may not • Control the patient’s pain without sedating him, so you cause obvious signs and symptoms, especially in cases of can continue to assess his injuries and ask him questions. blunt trauma. Generally, I.V. analgesics such as morphine can adequately To detect ominous changes in a patient’s condition, manage pain without sedation. you need to perform frequent, ongoing assessments and • Insert an indwelling urinary catheter, unless you suspect interpret your findings correctly. Key responses to decrease a urinary tract injury. For example, bloody urine or a mortality and morbidity include aggressive resuscitation prostate gland found to be in a high position during a rec- efforts, adequate volume replacement, early diagnosis of tal exam could indicate damage to the urinary tract. If the injuries, and surgical intervention if warranted. patient is to have a rectal examination, delay catheter inser- O tion until afterward. Setting priorities • Draw blood specimens stat for baseline lab values. (Ap- As always, your primary priorities are to maintain the pa- propriate tests are listed later in this article.) tient’s airway, breathing, and circulation. Next, perform a • Insert a gastric tube to decompress the patient’s stomach, rapid neurologic examination and assess him head to toe prevent aspiration, and minimize leakage of gastric con- to identify obvious injuries and signs of prolonged expo- tents and contamination of the abdominal cavity. This also sure to heat or cold. Ask the patient (or his family, emer- gives you access to gastric contents to test for blood. gency personnel, or bystanders) about his history— • Administer tetanus prophylaxis and antibiotics as or- allergies, medications, preexisting medical conditions, dered. when he last ate, and events immediately preceding or re- lated to his injury. Assessing abdominal injuries If your patient sustained blunt trauma, as in a motor Blunt injuries suffered during an MVC can be especially vehicle crash (MVC), keep his neck and spine immobilized difficult to detect. A penetrating abdominal injury, such as until X-rays rule out a spinal injury. If his viscera are pro- a stab wound, causes more obvious damage that com- truding, cover them with a sterile dressing moistened with monly involves hollow organs such as the small bowel. (To 0.9% sodium chloride solution to prevent drying. review the various types of trauma, see Forces behind ab- The following interventions are routine for a patient dominal injury.) with abdominal trauma: If your patient is stable, perform a complete assess- • Insert two large-bore intravenous (I.V.) lines to infuse ment using inspection, auscultation, percussion, and pal- ED Insider 4 Spring 2007 Forces behind abdominal injury Blunt trauma, a force to the abdomen that doesn’t leave an open wound, commonly occurs with motor vehicle crashes (MVCs) or falls. Compression and shearing are examples. Compression is the result of a direct blow, such as being thrust against Shearing is common during rapid deceleration a steering wheel or seat, or with pressure from a seat belt. in an MVC as a portion of the tissue continues to move forward while another portion remains stationary. Here, the liver has torn away from the portal vein. Penetrating trauma causes an open wound, such as from a gunshot or stabbing. The solid organs—diaphragm, spleen, liver, pancreas, and kidneys—can bleed profusely when injured. The hollow organs—stomach, gallbladder, large intestine, small intestine, and bladder—generally don’t bleed significantly but damage to them is more likely to cause peritonitis. A gunshot can damage multiple organs because of high A stab wound is typically more localized and may be less bullet velocity or fragmenting. The patient needs surgery damaging. to repair the injured tissues and remove bullet fragments. Spring 2007 5 ED Insider pation. If he’s unstable, you may have to rely on inspection and auscultation alone. An inside view of trauma Inspection. Look for and document obvious abnor- The following diagnostic methods are used to evaluate malities, including distension, contusions, abrasions, lacer- and classify abdominal trauma: ations, penetrating wounds, and asymmetry. If the patient Ultrasound is a common tool in EDs because it’s was in an MVC, look for a contusion or abrasion across his portable, noninvasive, and can be used during resuscita- lower abdomen, known as the “seat belt sign.” Areas of tion. Focused abdominal sonography for trauma (FAST) is purple discoloration should make you suspicious. Ecchy- close to 100% specific and 98% accurate in evaluating mosis around the umbilicus (Cullen’s sign) or flanks blunt abdominal trauma. It can detect 100 ml or more of (Grey-Turner’s sign) may indicate retroperitoneal hemor- fluid or blood in the pericardium, abdomen, or pelvis and rhage, but these signs may not appear for hours or days. lets you visualize the spleen and liver. Interpreting the Auscultation. If resuscitation efforts aren’t under way, results may be difficult when obesity, subcutaneous emphysema, or diaphragm or bowel injuries are involved. auscultate your patient’s baseline bowel sounds and listen Abdominal computed tomography (CT) scan can reveal for abdominal bruits. Always auscultate before percussion specific injury sites, the degree of injury and bleeding, and palpation because those procedures can change the and many retroperitoneal injuries that don’t show on an frequency of bowel sounds. Listen to all four quadrants of ultrasound. The patient must be hemodynamically stable his abdomen and his thorax. and cooperative so he can be moved from the ED and lie The absence of bowel sounds could be an early sign of quietly for the test. A CT scan is only marginally sensitive intraperitoneal damage. Bowel perforation and the spread for detecting injuries to the diaphragm, pancreas, and of blood, bacteria, and chemical irritants can cause dimin- hollow organs and may pose additional risks if used with ished or absent bowel sounds. Bowel sounds in the chest contrast media. may signal a ruptured diaphragm with herniation of the Diagnostic peritoneal lavage (DPL) usually is per- small bowel into the thoracic cavity. Abdominal bruits formed in the ED on patients who are hemodynamically unstable. A peritoneal dialysis catheter is inserted (vascular sounds due to turbulent blood flow that resemble through a small incision just below the umbilicus and a systolic heart murmurs) might signal an arterial injury or liter of warmed lactated Ringer’s or 0.9% sodium chloride aneurysm. solution is infused. Although highly sensitive for bleeding, Before you percuss and palpate your patient’s ab- DPL doesn’t indicate the source. If you remove the fluid domen, ask him to point to painful areas and be sure to ex- and it appears bloody or you can’t read a paper through amine them last. If his pain is severe, skip percussion and it, consider the results positive. False negatives are possi- palpation; diagnostic studies such as ultrasound and com- ble if the patient has adhesions or retroperitoneal hemor- puted tomography (CT) studies are necessary to evaluate rhage. his abdomen. Video-assisted diagnostic laparoscopy has helped Percussion. In a normal abdomen, percussion elicits reduce the number of laparotomies performed to evaluate dull sounds over solid organs and fluid-filled structures abdominal trauma. The clinician inserts a tiny camera through a small incision in the abdomen to evaluate the (such as a full bladder) and tympany over air-filled areas organs. Misplacing the trocar, however, could cause an (such as the stomach). The following findings are abnor- injury. mal: • Pain with light percussion suggests peritoneal inflamma- tion. mind that these signs and symptoms might not be present • Fixed dullness in the left flank and shifting dullness in the if he has competing pain from another injury, a retroperi- right flank while the patient is lying on his left side (Bal- toneal hematoma, spinal cord injury, or decreased level of lance’s sign) signal blood around the spleen or spleen in- consciousness or if he’s under the influence of drugs or al- jury. cohol. Generalized discomfort during palpation may signal • Dullness over regions that normally contain gas may in- peritonitis. An abdominal mass might be a collection of dicate accumulated blood or fluid. blood or fluid. (See “Assessing the Abdomen” in the May • Loss of dullness over solid organs indicates the presence issue of Nursing2003 for more on assessment techniques.) of “free air,” which signals bowel perforation. Your patient also may need an internal examination. A Palpation. Begin gently palpating your patient’s ab- rectal examination can help pinpoint injury to the urinary domen in an area where he hasn’t complained of pain. Pal- tract or pelvis. A vaginal examination can reveal a vaginal pate one quadrant at a time for involuntary guarding, injury or the presence of a foreign body, such as bone from tenderness, rigidity, spasm, and localized pain. Keep in a pelvic fracture. ED Insider 6 Spring 2007 Signs of internal injuries bowel. Deceleration with shearing may tear the small Certain telltale signs can help you sort out the many inter- bowel, generally in relatively fixed or looped areas. nal injuries that can occur with abdominal trauma. For ex- Blunt forces cause most bladder injuries. The bladder ample, a victim of an MVC can sustain a lap belt injury rises into the abdominal cavity when full, so it’s more sus- that deserves special attention.
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