All posts by TheTraumaPro

Pancreatic Injury Part 1 – Grading

The pancreas is a weird and mysterious organ. It’s considered a solid organ, but it doesn’t follow any of the usual rules. Today, I’ll review the grading system for injuries to this organ. Then over the next few days, I’ll review pancreatic injury management in adults and children.

The AAST has developed quite a few organ injury grading schemes over the years (32 to be exact). These are actually important to know, because they help us accomplish several things:

  • Objectively describe the degree of injury
  • Choose management strategies
  • Develop research cohorts so meaningful studies can be constructed

There are 5 grades that follow the usual AAST schema (numbered I-V). Unfortunately, I have not been able to find any quality diagrams, so you’ll just have to use your imagination.

image

  • Grade I: Minor contusion or laceration of the parenchyma without duct involvement
  • Grade II: Major contusion or laceration of the parenchyma without duct involvement
  • Grade III: Distal duct laceration or transection. Distal means to the left of the superior mesenteric vein
  • Grade IV: Proximal transection or parenchymal injury not involving the ampulla (note that this was corrected after publication of the original scale in 1990, which omitted the word not)
  • Grade V: Massive disruption of the pancreatic head

Tomorrow I’ll delve into diagnosis and management options in adults.

Related posts:

Reference: Pancreatic organ injury scale. J Trauma 30:1427–1429, 1990.

Trauma Activation Patients Hanging Out In Your ED Too Long?

One of the long-held beliefs in trauma care relates to the so-called “golden hour.” Patients who receive definitive care promptly do better, we are told. In most trauma centers, the bulk of this early care takes place in the emergency department. However, for a variety of reasons, throughput in the ED can be slow. Could extended periods of time spent in the ED after patient arrival have an impact on survival?

Wake Forest looked at their experience with nearly 4,000 trauma activation patients who were not taken to the OR immediately and who stayed in the ED for up to 5 hours. They looked at the impact of ED dwell time on in-hospital mortality, length of stay and ventilator days.

Overall mortality was 7%, and the average time in the ED was 3 hours and 15 minutes. The investigators set a reasonable but arbitrary threshold of 2 hours to try to get trauma activation patients out of the ED. When they looked at their numbers, they found that mortality increased (7.8% vs 4.3%) and that hospital and ICU lengths of stay were longer in the longer ED stay group. Hospital mortality increased with each hour spent in the ED, and 8.3% of patients staying between 4 and 5 hours dying. ED length of stay was an independent predictor for mortality even after correcting for ISS, RTS and age. The most common cause of death was late complications from infection.

Why is this happening? Patients staying longer in the ED between 2 and 5 hours were more badly injured but not more physiologically abnormal. This suggests that diagnostic studies or consultations were being performed. The authors speculated that the knowledge, experience and protocols used in the inpatient trauma unit were not in place in the ED, contributing to this effect.

Bottom line: This is an interesting retrospective study. It reflects the experience of only one hospital and the results could reflect specific issues found only at Wake Forest. However, shorter ED times are generally better for other reasons as well (throughput, patient satisfaction, etc). I would encourage all trauma centers to examine the flow and delivery of care for major trauma patients in the ED and to attempt to streamline those processes so the patients can move on to the inpatient trauma areas or ICU as efficiently as possible.

Reference: Emergency department length of stay is an independent predictor of hospital mortality in trauma activation patients. J Trauma 70(6):1317-1325, 2011.

Bystander CPR For People Not In Cardiac Arrest

CPR has increased the survival rate of patients suffering cardiac arrest, and early bystander CPR has been shown to double or triple survival. The sad truth is that CPR is not frequently performed by the general public. The American Heart Association has attempted to simplify CPR to the point that even untrained bystanders can administer chest compressions without a pulse check and without rescue breathing.

Bystander CPR

But what happens if that well-intentioned bystander starts CPR in someone who has not arrested? How often does this happen? Can the patient be injured?

The Medical College of Wisconsin reviewed the charts of all patients who received bystander CPR in Milwaukee County over a six year period. There were 672 incidents of bystander CPR. Of those cases, 77 (12%) were not in arrest when assessed by EMS personnel, and the researchers focused on those patients.

EMS response time averaged 5 minutes, and was greater than 10 minutes in only 2 cases. Average patient age was 43(!). The male/female ratio was just about 50:50, and the majority of the incidents took place in the home or residence.

Hospital records were available for further analysis in 72 of the patients. A quarter were sent home, a quarter admitted to a ward bed, and half were admitted to an ICU. Only 12 (17%) had a cardiac-related discharge diagnosis. The next most common discharge diagnoses were near-drowning, respiratory failure and drug overdose. Younger patients (<19) were usually near-drowning victims, and older patients (>54) were most commonly diagnosed with syncope. Five patients did not survive. Only one CPR injury was identified, which was charted as rhabdomyolysis “secondary to having received CPR” (a weak injury diagnosis, in my opinion).

Bottom line: The potential benefit of bystander CPR outweighs the risk of injury or performing it on a victim who is not in arrest. This study shows that, although these patients may not need CPR, they are generally very ill. Given the rapid EMS response times and the younger average age of the victims, no real injuries occurred. The new American Heart Association recommendations are beneficial and should be distributed widely.

Reference: The frequency and consequences of cardiopulmonary resuscitation performed by bystanders on patients who are not in cardiac arrest. Prehosp Emerg Care 15:282-287, 2011.