Low Back Pain and Pelvic Floor Disorders

Contents

Definition/Description

Low back pain (LBP) is a condition of localized pain to the lumbar spine with or without symptoms to the distal extremities whose etiology is commonly unknown.[1] Pelvic floor disorders (PFD) occur when the muscles that comprise the pelvic floor fail to properly contract, which can adversely causeurinary incontinence, pelvic organ prolapse, fecal incontinence, or other sensory and emptying abnormalities of the lower urinary and GI tracts.[2] Current evidence shows that individuals with low back pain have a significant decrease in pelvic floor function compared to individuals without low back pain.[3]

Epidemiology /Etiology

Low back pain (LBP) is one of the most common musculoskeletal conditions; approximately 70-80% of the population will experience at least one episode of LBP during his/her lifetime. Trauma, disease and even poor postural habits are some of the myriad causes of LBP, however, only about 15% of cases can be attributed to a specific cause. Studies show a poor correlation between the pathology and associated pain and disability.[3]

Over 25% of all women and more than a third over the age of 65 experience PFD. The true prevalence of PFD is underestimated for several reasons: heterogeneity in study populations, lack of standardized definitions, and under-reported symptoms due to the sensitive nature. Even though PFD is a physiological problem, the psychosocial impact can be much more detrimental to the patient’s quality of life. Chronic health problems associated with PFD are estimated to increase by 50% over the next 30 years due to the increasing numbers of women reaching age 65.[4] PFD does not typically have one specific cause. The major risk factors are: pregnancy/childbirth, age, hormonal changes, obesity, lower UTI, and pelvic surgery. The development of PFD most likely involves anatomical, physiological, genetic, reproductive and lifestyle components.[1][4]

A longitudinal study on younger, middle-age, and older women reported that women with pre-existing incontinence, gastrointestinal problems, and breathing disorders were more likely to develop LBP than women without such problems. [5][6]

Anatomy

Anatomy of the Pelvic Floor - copyright and courtesy of Primal Pictures Ltd.  www.primalpictures.com
Anatomy of the Pelvic Floor - copyright and courtesy of Primal Pictures Ltd. www.primalpictures.com

Lumbopelvic Stability System

Bone and ligament structures, muscle compression forces and nervous system control all contribute to lumbopelvic stability. The bone and ligament structures include the lumbar vertebrae and supporting ligaments, the pelvis, symphysis pubis and sacroiliac joints. This arrangement transfers weight from the upper body through the lumbosacral spine and across the pelvis to the femoral heads. The diaphragm, transversus abdominis, PFM and multifidus work synergistically to influence posture through intra-abdominal pressure regulation and thoracolumbar fascial tension. The nervous system evaluates the requirements of lumbopelvic control, determines the current status of the region and enacts strategies to meet those functional demands.[7]

The pelvic floor forms the inferior border of the abdomino-pelvic cavity.[4] It supports the abdomino-pelvic organs and the PFM are the only transverse load-bearing muscle group in the body. These muscles function as a unit instead of individually contracting. They play an important role in maintaining and increasing intra-abdominal pressure during functional tasks such as lifting, sneezing, coughing, and laughing to prevent urinary and fecal incontinence. The PFM, along with the deep abdominals and multifidus, use a feed-forward mechanism to stabilize the trunk and control intra-abdominal pressure in response to trunk perturbations.[3][8]

Characteristics/Clinical Presentation

Some characteristics of patients who present with LBP along with pelvic floor disorders: 

  • Women of middle to older age
  • Vaginal delivery (risk increases with multiple deliveries)[2]
  • Obesity[4]
  • Lumbopelvic pain
  • Incontinence

Many women with pelvic core neuromuscular system (PCNS) dysfunction present with a posterior pelvic tilt and decreased lumbar lordosis. Studies suggest that pain in the sacroiliac region may decrease motor control of the PFM.[3] Men can also have disorders of the pelvic floor, however due the anatomy of the male pelvis, it is less common. The male pelvis is more densely packed which allows for faster proprioceptive overflow and muscle recruitment.[9]

Differential Diagnosis

PFD and LBP are difficult to diagnose because they present many challenges due to poor association between pathophysiology, poor patient reported signs and symptoms, and anatomical evidence.[4]    

Examination

History 

Make sure to take a thorough history, clear any red flags, and ask the patient how signs/symptoms have affected his/her function. The following questions can be used to determine if the patient is experiencing any signs/symptoms of PFD.

  • How often do you urinate? (Normal – every 2-4 hours or 6-8 times a day)
  • Do you ever have urine leakage during activities such as coughing, sneezing, laughing, or exercise?
  • Do you ever have urine leakage associated with sudden strong urge?
  • Do you have trouble reaching the toilet in time?
  • Have you ever lost bowel control?[9]

Evaluation of LBP should begin with completion of the Oswestry Disability Index (ODI); based on the patient’s score a treatment based classification system or an impairment-based approach should be used to determine the best intervention.

The Physical Exam:

  • Observation of posture
  • Palpation
  • Neurological screen
  • Lumbar and hip AROM
  • Joint mobility assessment of the lumbar spine
  • Clear the hip for involvement (Scour Test, FABER)
  • Assess the sacroiliac joint for involvement (Posterior Shear Test, Gaenslen's Test)

The majority of this patient profile (LBP and PFD) will most likely benefit from stabilization interventions. Based on the patient’s primary complaints, it may or may not be necessary to proceed with a full pelvic floor examination.

A full pelvic floor exam should include:

  • Vaginal palpation - scored qualitatively either as correct or incorrect muscle contraction
  • Transabdominal ultrasound to assess the quality of voluntary and involuntary PFM and TrA muscle activation
  • Grading of PFM strength should be done using a perineometer and/or needle EMG to provide quantitative data about PFM contractions [3][8][10]

Medical Management

Pharmacological Management

Pharmacotherapy addresses the incontinence issues instead of targeting the overlying issue of PFD. The aim of these medications is to increase urethral closure pressure by targeting striated and smooth muscles of the urethra.[11] Some patients with LBP may choose to use pain medications or corticosteroid injections to relieve symptoms, however, these therapies do not address PFD nor the underlying problem of LBP.

Surgical Management

Surgery is indicated for women with LBP and PFD who have not benefited from conservative treatments such as physical therapy and have symptoms that significantly impact their daily life.

Surgical Interventions to address PFD:

  • Pubovaginal Sling Procedure
  • Implantation of artificial urinary sphincter
  • Midurethral sling procedure[12]

Physical Therapy Management

The pelvic floor can be facilitated by co-activating the abdominals and vice-versa. The abdominals contract in response to a pelvic floor contraction command and the PFM contract in response to a "hollowing or bracing" abdominal command.[8]

Exercise Progression to Address PFD/LBP[13]
Stage Process Goal Dosing

Diaphragmatic Breathing

The pt is seated with upright posture, one hand on chest, other on stomach (for self awareness); the pt expands his/her stomach while breathing in. 

To minimize ribcage elevation and increase intra-abdominal pressure. This creates a slight  stretch on abdominal muscles,  enhancing the contractile force and promoting a stronger PFM contraction.

consistent and correct breathing pattern through out daily activities

Tonic Activation

The pt places his/her fingers medial to ASIS for tactile feedback. The pt activates the TrA, which influences the PFM to co-contract.

To promote  a gentle and prolonged muscle hold of the PFM through the TrA co-contraction mechanism

5reps 5xday; gradually increase  to 30-40 sec holds 

Muscle Strengthening

The pt, in supine, performs the abdominal drawing in maneuver (ADIM) and maintains a strong hold while pulling up the PFM as far as possible as if to stop the flow of urine.

To strengthen the PFM to decrease urinary leakage and strengthen abdominal muscles to promote spinal stability

patient should hold for 3-5sec; count out loud

Functional Expiratory Patterns

The pt sits upright, and initiates a sustained nose blow. The pt should self evaluate PFM activation during expiration.

To retrain the PFM to activate in response to functional stresses (ie - nose blowing, coughing, sneezing)

repeat 5 times

Impact Activities

Progress the pt to his/her functional high impact activity while maintaining  abdominal and PFM contraction. (ie - running, exercise, lifting objects)

To transfer newly learned activation patterns into functional activities, once the pt achieves coughing/sneezing without loss

specific to each patient 


Current evidence supports the preceding exercise protocol; each exercise protocol has the common goal of regaining neuromuscular control of the pelvic floor and deep abdominal muscles in a functional matter.[14] There is also strong evidence for PFM training as conservative treatment for stress urinary incontinence.[7]


Lumbar Stabilization Exercises[15]
Transversus Abdominis

Abdominal bracing

Bracing with heel slides

Bracing with leg lifts

Bracing with bridging

Bracing in standing

8s hold x 20reps

4s hold x 20reps

4s hold x 20reps

8s hold x 30reps

8s hold x 30reps

Multifidus

Quadruped arm lifts with bracing

Quadruped leg lifts with bracing

Quadruped alt. arm/leg lifts with bracing

8s hold x 30reps

8s hold x 30reps

8s hold x 30reps

Oblique Abdominals

Side planks with knees flexed

Side planks with knees extended

8s hold x 30reps

8s hold x 30reps









Treatment for this patient should also include education on healthy lifestyle habits to promote optimal functioning of the lumbopelvic stability system. Examples of these habits include good posture, maintenance of a healthy body weight, proper diet, routine exercise, and refraining from smoking.

Key Research

Eliasson et al. (2008). Urinary Incontinence in Women with Low Back Pain

The purpose of this study was to explore the occurrence of urinary incontinence (UI) in women with LBP and to compare this group with a reference group with similar demographics. The study used previously collected original data for the reference group. Two hundred women with LBP completed a validated questionnaire; subject inclusion criteria included LBP, female, not pregnant, and age between 17 - 45 years old. Study results found 78% of women with LBP reported UI. Compared to the reference group, the prevalence of UI and signs of PFD were significantly increased in the LBP group (p<.001).

Arab et al. (2010). Assessment of Pelvic Floor Muscle Function in Women with and without Low Back Pain Using Transabdominal Ultrasound

The purpose of this study was to investigate the PFM function in women with and without LBP using transabdominal ultrasound. A cross-sectional design was used to compare 40 nonpregnant women between the ages of 20 and 50 years old (20 with LBP; 20 without LBP); subject inclusion criteria for the LBP group included LBP, 6 weeks of on/off back pain and had experienced at least 3 episodes each lasting at least a week. Each participant underwent transabdominal ultrasound normalized to their calculated BMI; PFM function differs according to each individuals BMI. Baseline was established as the base of the bladder before contraction, and the change in distance of the base of bladder from pre and post contraction was used to determine significance of findings. Study results found a significant difference (p = .04) in the transabdominal ultrasound measurements of PFM function btw subjects with LBP and those without LBP. Participants with LBP displayed a pattern of decreased pelvic floor function when measured with transabdominal ultrasound.

Resources

Interactive Atlas of the Female Pelvis

Presentations

http://www.youtube.com/watch?v=w08iCzxnQBU
Pelvic Physiotherapy - to Kegel or Not?

This presentation was created by Carolyn Vandyken, a physiotherapist who specializes in the treatment of male and female pelvic dysfunction. She also provides education and mentorship to physiotherapists who are similarly interested in treating these dysfunctions. In the presentation, Carolyn reviews pelvic anatomy, the history of Kegel exercises and what the evidence tells us about when Kegels are and aren't appropriate for our patients.

View the presentation

http://www.youtube.com/watch?v=XOLRQzsa68U
Pelvic Floor Dysfunction and LBP: Diagnosis and Management

This presentation, created by Rico Buentello, Christine Castillo, Martini Castaneda, and Dylan Cooke; Texas State DPT Class.

View the presentation

https://http://www.youtube.com/watch?v=po4z_pdVuzQ
Relationship Between LBP and Disorders of the Pelvic Floor

This presentation, created by Ashley Aikman, Delesa Monroe, Ashley Trotter, Michael Landin; Texas State Class of 2014, Evidence-based Practice projects for PT7539 Ortho Spine course.

Relationship Between LBP and Disorders of the Pelvic Floor / View the presentation

Clinical Bottom Line

Transabdominal ultrasound has proven that the PFM and trunk musculature co-contract to provide stability to the lumbar spine and pelvis. Lack of neuromuscular control in the PFM can be associated with trunk instability, which results in LBP.[3][5][6][7][9][16][17] It is important for the physical therapist to consider pelvic floor dysfunction when evaluating and treating patients with LBP. Although recent research has made many gains in relating LBP and PFD, much more progress is needed to definitively establish the relationship between the two conditions and identify successful intervention techniques.

Recent Related Research (from Pubmed)

References

  1. 1.0 1.1 Eliasson K, Elfving B, Nordgren B, Mattsson E. Urinary incontinence in women with low back pain. Manual Therapy. June 2008;13(3):206-212.
  2. 2.0 2.1 Nygaard I, Barber M, Brody D, et al. Prevalence of symptomatic pelvic floor disorders in US women. JAMA: Journal of the American Medical Association. September 17, 2008;300(11):1311-1316.
  3. 3.0 3.1 3.2 3.3 3.4 3.5 Arab A, Behbahani R, Lorestani L, Azari A. Assessment of pelvic floor muscle function in women with and without low back pain using transabdominal ultrasound. Manual Therapy. June 2010;15(3):235-239.
  4. 4.0 4.1 4.2 4.3 4.4 Davis, Kathy. Pelvic floor dysfunction: causes and assessment. Practice Nursing. July 2010;21(7):340-346.
  5. 5.0 5.1 Smith M, Russell A, Hodges P. Do incontinence, breathing difficulties, and gastrointestinal symptoms increase the risk of future back pain?. Journal of Pain. August 2009;10(8):876-886.
  6. 6.0 6.1 Smith M, Russell A, Hodges P. Do incontinence, breathing difficulties, and gastrointestinal symptoms increase the risk of future back pain? Journal of Pain. August 2009;10(8):876-886.
  7. 7.0 7.1 7.2 Grewar H, McLean L. The integrated continence system: a manual therapy approach to the treatment of stress urinary incontinence. Manual Therapy. October 2008;13(5):375-386.
  8. 8.0 8.1 8.2 Mohseni-Bandpei M, Rahmani N, Behtash H, Karimloo M. The effect of pelvic floor muscle exercise on women with chronic non-specific low back pain. Journal of Bodywork &amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp; Movement Therapies. 2011;15(1):75-81.
  9. 9.0 9.1 9.2 Christie C, Colosi R. Paving the way for a healthy pelvic floor. IDEA Fitness Journal. May 2009;6(5):42-49.
  10. Bo K, Sherburn M. Evaluation of female pelvic-floor muscle function and strength. Physical Therapy. March 2005;85(3):269-282.
  11. Hashim H, Abrams P. Pharmacological management of women with mixed urinary incontinence. March 2006;66(5):591-606.
  12. McKertich K. Urinary incontinence - Procedural and surgical treatments for women. Australian Family Physician. March 2008;37(3):122-131.
  13. Sapsford R. Rehabilitation of pelvic floor muscles utilizing trunk stabilization. Manual Therapy. February 2004;9(1):3-12.
  14. O'Sullivan P, Beales D. Changes in pelvic floor and diaphragm kinematics and respiratory patterns in subjects with sacroiliac joint pain following a motor learning intervention: a case series. Manual Therapy. August 2007;12(3):209-218.
  15. Hicks G, Fritz J, Delitto A, McGill S. Preliminary development of a clinical prediction rule for determining which patients with low back pain will respond to a stabilization exercise program. Archives of Physical Medicine &amp;amp;amp;amp;amp;amp;amp;amp;amp; Rehabilitation. September 2005;86(9):1753-1762.
  16. Pool-Goudzwaard A, Slieker ten Hove M, Stoeckart R, et al. Relations between pregnancy-related low back pain, pelvic floor activity and pelvic floor dysfunction. International Urogynecology Journal And Pelvic Floor Dysfunction. November 2005;16(6):468-474.
  17. Smith M, Russell A, Hodges P. Disorders of breathing and continence have a stronger association with back pain than obesity and physical activity. Australian Journal of Physiotherapy. March 2006;52(1):11-16.