lumb-, lumbo- +

(Latin: loin; by extension, the lower back)

The lower part of the back on either side of the backbone between the hipbones and the ribs.
ascending lumbar vein, vena lumbalis ascendens
Paired, vertical vein of the posterior abdominal wall, adjacent and parallel to the vertebral column, posterior to the origin of the psoas major muscle (bodies of vertebrae and intervertebral disks from the twelfth thoracic to the fifth lumbar); it connects the common iliac (dorsal bone of the pelvis), iliolumbar, and lumbar veins in the paravertebral line, the right vein joining the right subcostal vein to form the azygos vein, the left vein uniting with the left subcostal (below the ribs); vein to form the hemiazygos vein (merger of the left ascending lumbar vein with the left subcostal vein).
iliolumbar vein, vena iliolumbalis
Accompanying the artery of the same name, anastomosing (joining two tubular organs) with the lumbar and deep circumflex iliac veins, and emptying into the internal iliac vein (one of three veins draining the pelvic area).
ischemic lumbago
Pain in the lower back and buttock(s) due to vascular insufficiency, as in terminal aortic occlusion.
lumbago
1. A painful condition of the lower back, as one resulting from muscle strain or a slipped disk.
2. Pain in the loins, the parts of the sides of the back between the thorax and the pelvis.
lumbal
Near, the loins; as, the lumbar arteries.
lumbar
Pertaining to the loins, the parts of the sides of the back between the thorax and the pelvis.
lumbar palpation (s) (noun), lumbar palpations (pl)
Palpation of a ptotic or enlarged kidney with one hand while the other hand is placed under the lumbar region, the subject being examined in the dorsal decubitus (reclining) position.
lumbar puncture (s), lumbar punctures (pl); spinal tap (s), spinal taps (pl) (noun forms)
A lumbar puncture, or "LP", is a spinal tap which is a procedure whereby spinal fluid is removed from the spinal canal for the purpose of diagnostic testing.

It is particularly helpful in the diagnosis of inflammatory diseases of the central nervous system; especially, infections, such as meningitis. It can also provide clues to the diagnosis of stroke, spinal cord tumor, and cancer in the central nervous system.

A lumbar puncture is so-called because the needle goes into the lumbar portion of the back. Other names for a lumbar puncture (an LP) include spinal puncture, thecal puncture, and rachiocentesis.

A lumbar puncture can also be done for therapeutic purposes, namely as a way of administering antibiotics, cancer drugs, or anesthetic agents into the spinal canal. Spinal fluid is sometimes removed by lumbar puncture for the purpose of decreasing spinal fluid pressure in patients with uncommon conditions; such as, normal-pressure hydrocephalus and benign intracranial hypertension.

After local anesthesia is injected into the small of the back (the lumbar area), a needle is inserted in between the nearby bony building blocks (vertebrae) into the spinal canal. The needle is usually placed between the 3rd and 4th lumbar vertebrae. Spinal fluid pressure can then be measured and cerebrospinal fluid (CSF) removed for testing.

The cerebrospinal fluid circulates around the brain and spinal cord (the central nervous system). This "water bath" acts as a support of buoyancy for the brain and spinal cord. The support of the cerebrospinal fluid helps to protect the brain from injury.

Spinal fluid obtained from the lumbar puncture can be used to diagnose many important diseases such as bleeding around the brain; increased pressure from hydrocephalus; inflammation of the brain, spinal cord, or adjacent tissues (encephalitis, meningitis); tumors of brain or spinal cord, etc. Sometimes spinal fluid can indicate diseases of the immune system, such as multiple sclerosis.

When spinal fluid is removed during a lumbar puncture, the risks include headache, brain herniation, bleeding, and infection. Each of these complications are uncommon with the exception of headache, which can appear from hours to up to a day after lumbar puncture.

Headaches occur less frequently when the patient remains lying flat one to three hours after the procedure. The benefits of the lumbar puncture depend upon the exact situation but a lumbar puncture can provide lifesaving information.

lumbar veins, venae lumbales
Five in number, these veins accompany the lumbar arteries, drain the posterior body wall and the lumbar vertebral venous plexuses, and terminate anteriorly as follows: the first and second in the ascending lumbar vein, the third and fourth in the inferior vena cava, and the fifth in the iliolumbar vein; all communicate via the ascending lumbar veins.
lumbar vertebrae, vertebrae lumbales (pl) (noun)
The bones, usually five in number, located in the lumbar region of the back which is near, or situated in the part of the back and sides between the lowest ribs and the pelvis.
lumbarization
A condition in which the first segment of the sacrum is not fused with the second, so that there is one additional articulated vertebra and the sacrum consists of only four segments.
lumboabdominal
Relating to the sides and front of the abdomen.
lumbocolostomy
The operation of forming a permanent opening into the colon by an incision through the lumbar region.
lumbocolotomy
An incision into the colon through the loin.
lumbocostal
1. A reference to the loin and the ribs.
2. Relating to the lumbar vertebrae and the ribs.

Denoting a ligament connecting the first lumbar vertebra with the neck of the twelfth rib.

Word families with similar applications: "back, backside" word units: dorso- (back, on the back); nuch- (nape of the neck); pygo- (rump, rear end, back side).