Anterior Shoulder Dislocation
Medgeeks with Andrew Reid
Medgeeks
4.8 • 997 Ratings
🗓️ 23 October 2017
⏱️ 12 minutes
🧾️ Download transcript
Summary
Today, we're going to talk about anterior shoulder dislocations. You're going to learn:
1. Shoulder anatomy
2. Patient presentation
3. Etiology
4. What to look out for on the physical exam
5. The required imaging studies
6. How to reduce the shoulder
Thursday we'll share part 2 of this lecture. In that lecture we'll discuss how to sedate your patients for those who can't tolerate the pain associated with reduction.
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Transcript
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| 0:00.0 | What's up guys today we're going to talk about shoulder dislocations. We're going to talk about how these patients will present what causes this injury what to look out for on physical exam what imaging studies do we need to order and finally I'm going to teach you how to put the shoulder back in place. But before we do, let's quickly |
| 0:13.7 | go over some anatomy of the shoulder. The shoulder is a naturally very unstable joint. This is because |
| 0:18.7 | the glenoid cavity is shallow and it's purposely like this to allow a wide range of motion. |
| 0:23.5 | Furthermore, only a small part of the humoral head articulates with the glenoid in any position. |
| 0:28.1 | Then you have the glenoid labrum, which is a fibrocardolagina structure that surrounds the surrounds the Glenoid fossa and inserts into the edge of the |
| 0:34.8 | joint capsule. |
| 0:35.8 | You also have your Glenohumoral ligaments, which help to strengthen the anterior |
| 0:39.3 | aspect of the Glenoid capsule and the Corrico-humoral ligament which strengthens the superior portion. |
| 0:44.6 | Then you have your four rotator cuff muscles which provide additional support to the |
| 0:48.8 | shoulder joint helping to prevent dislocations. You can remember these muscles by the mnemonic sits, that's S I T S, where the first |
| 0:56.8 | S stands for super sponatus, I stands for M frusbinatus, T stands for T stands for T |
| 1:02.3 | Terry's minor, and the second T stands for T-S stands for subscapularis. |
| 1:05.8 | Finally, you have the axillary nerve which innervates the deltoid and the terry's minor |
| 1:10.0 | muscles. Furthermore, it is the most common nerve injured in anterior |
| 1:13.8 | shoulder dislocations. So now we know the basic anatomy of the shoulder, what |
| 1:17.5 | structures aid in a stability, and why it's naturally a very unstable joint. |
| 1:21.4 | Now let's talk about the most common types of shoulder |
| 1:23.7 | dislocations and the mechanism behind this injury. The most common type of |
| 1:27.2 | shoulder dislocations are by far going to be anterior shoulder dislocations. |
| 1:31.4 | I'll say that again. The most common type are anterior |
| 1:34.8 | shoulder dislocations which occur approximately 95 to 97 percent of the time. |
| 1:39.4 | posterior dislocations occur about 2 to 4 percent of the time and inferior dislocations occur 0.5% of the time. |
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