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C-SPINE
POSITIONING OF C-SPINE XRAY EXAMS
| Question | Answer |
|---|---|
| Where do you center for an AP Open Mouth Odontoid? | Perpendicular to the IR, enters open mouth. |
| How much do you angle for anterior obliques of a C-spine? | 15-20 degrees caudal. |
| What anatomy is seen on a Lateral C-spine? | Squared vertebral bodies, spinous processes, intervertebral joints, & zygapophyseal joints C2-T7. |
| What position is appropriate for a Swimmers Lateral of the C-Spine? | The patient is lateral with the arm closest to the IR raised over the head to drop the opposite shoulder lower and move it out of view. |
| Where do you center for flexion extension laterals of the C-Spine? | The CR is perpendicular to the IR, it enters C4 and passes through the mastoid tip. |
| What anatomy is shown on an AP Fuchs Odontoid? | The Odontoid process within the Foramen Magnum. |
| What intervertebral foramina are best demonstrated by an RPO position of the C-Spine? | The Left intervertebral Foramina are seen best in this position. |
| What intervertebral foramina are best demonstrated by an LAO of the C-Spine? | An LAO position would best demonstrate the Left intervertebral foramina. |
| What is the correct position for an RAO/LAO of the C-Spine? | Body rotated 45 degrees/ breast and shoulder are against the IR, the head is lateral. |
| What angle is used for an AP Axial C-Spine? | 15-20 Cephalad. |
| What anatomy is demonstrated on an AP Axial of the C-Spine? | Vertebral bodies & intervertebral joints of C3-T1. |
| Where do you center for a Swimmers Lateral of the C-Spine? | The beam is Horizontal, and Perpendicular to IR; enters C7/T1 at level of vertebra prominens. |
| Where should the CR enter for an AP Fuchs Odontoid? | CR is perpendicular to IR, enters just distal to the tip of the chin. |
| Where should the CR enter for a Cross-Table Lateral C-Spine? | Perpendicular to the IR, enters C4, passed through the masoid tip (coronal plane). |
| What anatomy is visualized on a Swimmers Lateral C-Spine? | A lateral view of C7/T1. |
| What position should the patient be in for an AP Axial of the C-Spine? | The head is positioned until the line from the occlusal plane to the mastoid tip is perpendicular to the IR. |
| How much do you angle for posterior obliques of a C-spine? | 15-20 degrees cephalad. |
| What intervertebral foramina are best demonstrated by an LPO position of the C-Spine? | The Right intervertebral Foramina are seen best in this position. |
| What intervertebral foramina are best demonstrated by an RAO of the C-Spine? | This position would best demonstrate the Right intervertebral foramina. |
| Where should you center for an AP Axial C-Spine? | To inferior margin of thyroid cartilage (C4). |
| What anatomy is demonstrated on an RAO of the C-Spine? | The Right intervertebral foramina are best demonstrated in this position. |
| What anatomy is demonstrated on an LAO of the C-Spine? | Tbe Left intervertebral foramina are best demonstrated in this position. |
| What is the proper position for a Lateral C-Spine? | Patient is erect with arms by sides; chin slightly elevated and head is lateral. |
| What anatomy is demonstrated on an AP Open Mouth Odontoid? | Odontoid Process, lateral masses (C1) & zygapophyseal joints C1/C2. |
| What is the proper patient position for an AP Fuchs Odontoid? | Chin elevated until tip & mastoid process are vertical. |
| What anatomy is demonstrated on Flexion & Extension Laterals ofthe C-Spine? | Same as Lateral & to demonstrate range of motion & ligament stability ("whiplash" injuries). |
| What is the proper position for an AP Open Mouth Odontoid? | Head positioned until line from lower margin of upper incisors to mastoid tip is perpendicular to IR when mouth is open. |
| What anatomy is demonstrated on a Cross-Table Lateral of the C-Spine? | The same as a lateral & articular pillars (This is a trauma view). |
| What is the proper patient position for a cross-table lateral? | Patient is Supine with arms by sides; chin is slightly elevated & head lateral. |
| What is the proper patient position for Flexion and Extension Laterals? | Paient is erect with arms by sides; chin is hyperextended (head tilted back); chin is hyperflexed (head bent forward). |