Lennart Knaack

2.9k total citations · 1 hit paper
20 papers, 2.0k citations indexed

About

Lennart Knaack is a scholar working on Physiology, Endocrine and Autonomic Systems and Cognitive Neuroscience. According to data from OpenAlex, Lennart Knaack has authored 20 papers receiving a total of 2.0k indexed citations (citations by other indexed papers that have themselves been cited), including 17 papers in Physiology, 10 papers in Endocrine and Autonomic Systems and 9 papers in Cognitive Neuroscience. Recurrent topics in Lennart Knaack's work include Obstructive Sleep Apnea Research (17 papers), Neuroscience of respiration and sleep (10 papers) and Sleep and Wakefulness Research (8 papers). Lennart Knaack is often cited by papers focused on Obstructive Sleep Apnea Research (17 papers), Neuroscience of respiration and sleep (10 papers) and Sleep and Wakefulness Research (8 papers). Lennart Knaack collaborates with scholars based in Germany, United States and Belgium. Lennart Knaack's co-authors include Paul Van de Heyning, Joachim T. Maurer, Kingman P. Strohl, David L. Steward, Ryan J. Soose, Patrick J. Strollo, Nico de Vries, Oleg Froymovich, Neil T. Feldman and Tapan Padhya and has published in prestigious journals such as New England Journal of Medicine, American Journal of Respiratory and Critical Care Medicine and SLEEP.

In The Last Decade

Lennart Knaack

18 papers receiving 1.9k citations

Hit Papers

align trajectories

What are hit papers?

Hit papers significantly outperform the citation benchmark for their cohort. A paper qualifies if it has ≥500 total citations, achieves ≥1.5× the top-1% citation threshold for papers in the same subfield and year (this is the minimum needed to enter the top 1%, not the average within it), or reaches the top citation threshold in at least one of its specific research topics.

Upper-Airway Stimulation for Obstructive Sleep Apnea

2014 793 citations Patrick J. Strollo, Ryan J. Soose et al. New England Journal of Medicine profile →

Peers — A (Enhanced Table)

Peers by citation overlap · career bar shows stage (early→late) cites · hero ref

Name	h						Papers	Cites
Lennart Knaack Germany	11	1.8k	1.5k	584	514	295	20	2.0k
B. Tucker Woodson United States	24	2.6k 1.4×	1.9k 1.3×	1.0k 1.8×	518 1.0×	569 1.9×	62	2.8k
Jason R. Cornelius United States	8	1.2k 0.6×	952 0.6×	358 0.6×	441 0.9×	227 0.8×	10	1.5k
Michael Stanchina United States	18	1.5k 0.8×	1.2k 0.8×	726 1.2×	456 0.9×	144 0.5×	23	1.8k
Ruth N. Kingshott United Kingdom	21	2.0k 1.1×	1.6k 1.1×	746 1.3×	682 1.3×	198 0.7×	38	2.3k
Luigi Taranto‐Montemurro United States	29	2.6k 1.4×	2.0k 1.4×	1000 1.7×	930 1.8×	145 0.5×	89	2.9k
Alan R. Schwartz United States	7	1.4k 0.8×	1.2k 0.8×	561 1.0×	313 0.6×	162 0.5×	7	1.6k
D. J. Tangel United States	13	1.3k 0.7×	1.1k 0.8×	514 0.9×	399 0.8×	171 0.6×	16	1.6k
Bethany Staley United States	22	1.5k 0.8×	1.0k 0.7×	520 0.9×	594 1.2×	137 0.5×	40	1.9k
Julian P. Saboisky Australia	22	970 0.5×	894 0.6×	240 0.4×	480 0.9×	189 0.6×	35	1.3k
Alex Clerk United States	15	1.3k 0.7×	1.1k 0.7×	617 1.1×	404 0.8×	80 0.3×	20	1.6k

Countries citing papers authored by Lennart Knaack

Since Specialization

Citations

This map shows the geographic impact of Lennart Knaack's research. It shows the number of citations coming from papers published by authors working in each country. You can also color the map by specialization and compare the number of citations received by Lennart Knaack with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Lennart Knaack more than expected).

Fields of papers citing papers by Lennart Knaack

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Lennart Knaack. Nodes represent research fields, and links connect fields that are likely to share authors. Colored nodes show fields that tend to cite the papers produced by Lennart Knaack. The network helps show where Lennart Knaack may publish in the future.

Co-authorship network of co-authors of Lennart Knaack

This figure shows the co-authorship network connecting the top 25 collaborators of Lennart Knaack. A scholar is included among the top collaborators of Lennart Knaack based on the total number of citations received by their joint publications. Widths of edges represent the number of papers authors have co-authored together. Node borders signify the number of papers an author published with Lennart Knaack. Lennart Knaack is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

All Works

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20 of 20 papers shown

Knaack, Lennart, et al.. (2022). Sex differences in polysomnographic findings in patients with obstructive sleep apnea. Sleep Medicine. 101. 429–436. 14 indexed citations

Knaack, Lennart, et al.. (2019). Rheumatologische Erkrankungen und Schlaf – Schlafmedizinische Aspekte der Diagnostik und Therapie – Eine literaturbasierte Übersicht. Laryngo-Rhino-Otologie. 98(11). 776–788. 2 indexed citations

Knaack, Lennart, et al.. (2018). Rheumatologische Erkrankungen und Schlaf – Schlafmedizinische Aspekte der Diagnostik und Therapie – Eine literaturbasierte Übersicht. Aktuelle Rheumatologie. 43(4). 277–288. 1 indexed citations

Strollo, Patrick J., Ryan J. Soose, Joachim T. Maurer, et al.. (2014). Upper-Airway Stimulation for Obstructive Sleep Apnea. Survey of Anesthesiology. 58(4). 205–206. 368 indexed citations

Strollo, Patrick J., Ryan J. Soose, Joachim T. Maurer, et al.. (2014). Upper-Airway Stimulation for Obstructive Sleep Apnea. New England Journal of Medicine. 370(2). 139–149. 793 indexed citations breakdown →

Heyning, Paul Van de, M. Safwan Badr, Jonathan Z. Baskin, et al.. (2012). Implanted upper airway stimulation device for obstructive sleep apnea. The Laryngoscope. 122(7). 1626–1633. 188 indexed citations

Strohl, Kingman P., Safwan Badr, Arie Oliven, et al.. (2012). 12-Month Follow-Up Of Upper Airway Stimulation For Obstructive Sleep Apnea. A3850–A3850.

Badr, M. Safwan, Arie Oliven, Joachim T. Maurer, et al.. (2011). Predictors Of Response For Upper Airway Stimulation In Obstructive Sleep Apnea. A2727–A2727. 3 indexed citations

Knaack, Lennart, et al.. (2008). Obliteration großer Arterien als Spätfolge strahleninduzierter Vaskulopathien. DMW - Deutsche Medizinische Wochenschrift. 122(20). 655–658.

10.

Stoohs, Riccardo, et al.. (2007). Differences in clinical features of upper airway resistance syndrome, primary snoring, and obstructive sleep apnea/hypopnea syndrome. Sleep Medicine. 9(2). 121–128. 46 indexed citations

11.

Stoohs, Riccardo, et al.. (2005). Non-invasive Estimation of Esophageal Pressure Based on Intercostal EMG Monitoring. PubMed. 4. 3867–3869. 6 indexed citations

12.

Knaack, Lennart, et al.. (2005). Comparison of Diaphragmatic EMG and Oesophageal Pressure in Obstructed and Unobstructed Breathing during Sleep. Korrelation von diaphragmalem EMG und Osophagusdruckmessung bei obstruierter und unobstruierter Atmung im Schlaf. Somnologie - Schlafforschung und Schlafmedizin. 9(3). 159–165. 5 indexed citations

13.

Stoohs, Riccardo, et al.. (2005). Comparison of Pleural Pressure and Transcutaneous Diaphragmatic Electromyogram in Obstructive Sleep Apnea Syndrome. SLEEP. 28(3). 321–9. 26 indexed citations

14.

Schwartz, Alan R., Marc Bennett, Philip L. Smith, et al.. (2001). Therapeutic Electrical Stimulation of the Hypoglossal Nerve in Obstructive Sleep Apnea. Archives of Otolaryngology - Head and Neck Surgery. 127(10). 1216–1216. 207 indexed citations

15.

Penzel, Thomas, et al.. (2001). Effect of Sleep Position and Sleep Stage on the Collapsibility of the Upper Airways in Patients with Sleep Apnea EFFECT OF SLEEP POSITION AND SLEEP STAGE. 12 indexed citations

16.

Penzel, Thomas, et al.. (2001). Effect of Sleep Position and Sleep Stage on the Collapsibility of the Upper Airways in Patients with Sleep Apnea. SLEEP. 24(1). 90–95. 136 indexed citations

17.

Knaack, Lennart, et al.. (2000). Association between blood pressure reduction with antihypertensive treatment and sleep apnea activity. American Journal of Hypertension. 13(12). 1280–1287. 30 indexed citations

18.

Grote, Ludger, T Ploch, J. Heitmann, et al.. (1999). Sleep-related Breathing Disorder Is an Independent Risk Factor for Systemic Hypertension. American Journal of Respiratory and Critical Care Medicine. 160(6). 1875–1882. 161 indexed citations

19.

Knaack, Lennart & T. Podszus. (1998). Electric stimulation of the upper airway muscle. Current Opinion in Pulmonary Medicine. 4(6). 370–375. 5 indexed citations

20.

Heitmann, J., Ludger Grote, Lennart Knaack, et al.. (1998). Cardiovascular effects of mibefradil in hypertensive patients with obstructive sleep apnea. European Journal of Clinical Pharmacology. 54(9-10). 691–696. 10 indexed citations

Rankless uses publication and citation data sourced from OpenAlex, an open and comprehensive bibliographic database. While OpenAlex provides broad and valuable coverage of the global research landscape, it—like all bibliographic datasets—has inherent limitations. These include incomplete records, variations in author disambiguation, differences in journal indexing, and delays in data updates. As a result, some metrics and network relationships displayed in Rankless may not fully capture the entirety of a scholar's output or impact.

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